Merge remote-tracking branch 'origin/5.15' into dev

 Conflicts:
	tests/auto/sql/kernel/qsqlquery/tst_qsqlquery.cpp

Change-Id: I6b82507bf9a80a374c40393e72f4843f1557de89

101 files changed, 1234 insertions, 507 deletions

diff --git a/examples/widgets/doc/src/shapedclock.qdoc b/examples/widgets/doc/src/shapedclock.qdoc
index 2e5d8b1496..732820cdc8 100644
--- a/examples/widgets/doc/src/shapedclock.qdoc
+++ b/examples/widgets/doc/src/shapedclock.qdoc
@@ -29,16 +29,18 @@
     \example widgets/shapedclock
     \title Shaped Clock Example
     \ingroup examples-widgets
-    \brief The Shaped Clock example shows how to apply a widget mask to a top-level
-    widget to produce a shaped window.
+    \brief The Shaped Clock example shows how to apply a translucent background
+    and a widget mask to a top-level widget to produce a shaped window.
 
     \borderedimage shapedclock-example.png
 
-    Widget masks are used to customize the shapes of top-level widgets by restricting
-    the available area for painting. On some window systems, setting certain window flags
-    will cause the window decoration (title bar, window frame, buttons) to be disabled,
-    allowing specially-shaped windows to be created. In this example, we use this feature
-    to create a circular window containing an analog clock.
+    Widget masks are used to customize the shapes of top-level widgets by
+    restricting the area available for painting and mouse input. Using a
+    translucent background facilitates partially transparent windows and smooth
+    edges. On most window systems, setting certain window flags will cause the
+    window decoration (title bar, window frame, buttons) to be disabled,
+    allowing specially-shaped windows to be created. In this example, we use
+    this feature to create a circular window containing an analog clock.
 
     Since this example's window does not provide a \uicontrol File menu or a close
     button, we provide a context menu with an \uicontrol Exit entry so that the example
@@ -52,8 +54,10 @@
 
     \snippet widgets/shapedclock/shapedclock.h 0
 
-    The \l{QWidget::paintEvent()}{paintEvent()} implementation is the same as that found
-    in the \c AnalogClock class. We implement \l{QWidget::sizeHint()}{sizeHint()}
+    The \l{QWidget::paintEvent()}{paintEvent()} implementation is the same as
+    that found in the \c AnalogClock class, with one important exception: we
+    now must also draw background (the clock face) ourselves, since the widget
+    background is just transparent. We implement \l{QWidget::sizeHint()}{sizeHint()}
     so that we don't have to resize the widget explicitly. We also provide an event
     handler for resize events. This allows us to update the mask if the clock is resized.
 
@@ -70,9 +74,11 @@
 
     \snippet widgets/shapedclock/shapedclock.cpp 0
 
-    We inform the window manager that the widget is not to be decorated with a window
-    frame by setting the Qt::FramelessWindowHint flag on the widget. As a result, we need
-    to provide a way for the user to move the clock around the screen.
+    We request a transparent window by setting the Qt::WA_TranslucentBackground
+    widget attribute. We inform the window manager that the widget is not to be
+    decorated with a window frame by setting the Qt::FramelessWindowHint flag
+    on the widget. As a result, we need to provide a way for the user to move
+    the clock around the screen.
 
     Mouse button events are delivered to the \c mousePressEvent() handler:
 
@@ -94,14 +100,20 @@
     widget is moved to the point given by subtracting the \c dragPosition from the current
     cursor position in global coordinates. If we drag the widget, we also accept the event.
 
-    The \c paintEvent() function is given for completeness. See the
-    \l{Analog Clock Example}{Analog Clock} example for a description of the process used
-    to render the clock.
+    The \c paintEvent() function is mainly the same as described in the
+    \l{Analog Clock Example}{Analog Clock} example. The one addition is that we
+    use QPainter::drawEllipse() to draw a round clock face with the current
+    palette's default background color. We make the clock face a bit smaller
+    than the widget mask, so that the anti-aliased, semi-transparent pixels on
+    the edge are not clipped away by the widget mask. This gives the shaped
+    window smooth edges on the screen.
 
     \snippet widgets/shapedclock/shapedclock.cpp 3
 
-    In the \c resizeEvent() handler, we re-use some of the code from the \c paintEvent()
-    to determine the region of the widget that is visible to the user:
+    In the \c resizeEvent() handler, we re-use some of the code from the \c
+    paintEvent() to determine the region of the widget that is visible to the
+    user. This tells the system the area where mouse clicks should go to us,
+    and not to whatever window is behind us:
 
     \snippet widgets/shapedclock/shapedclock.cpp 4
 
@@ -121,6 +133,12 @@
 
     \section1 Notes on Widget Masks
 
+    Widget masks are used to hint to the window system that the application
+    does not want mouse events for areas outside the mask. On most systems,
+    they also result in coarse visual clipping. To get smooth window edges, one
+    should use translucent background and anti-aliased painting, as shown in
+    this example.
+
     Since QRegion allows arbitrarily complex regions to be created, widget masks can be
     made to suit the most unconventionally-shaped windows, and even allow widgets to be
     displayed with holes in them.
diff --git a/examples/widgets/widgets/shapedclock/shapedclock.cpp b/examples/widgets/widgets/shapedclock/shapedclock.cpp
index 3c78f4da89..673d1a218f 100644
--- a/examples/widgets/widgets/shapedclock/shapedclock.cpp
+++ b/examples/widgets/widgets/shapedclock/shapedclock.cpp
@@ -61,6 +61,7 @@
 ShapedClock::ShapedClock(QWidget *parent)
     : QWidget(parent, Qt::FramelessWindowHint | Qt::WindowSystemMenuHint)
 {
+    setAttribute(Qt::WA_TranslucentBackground);
     QTimer *timer = new QTimer(this);
     connect(timer, &QTimer::timeout, this, QOverload<>::of(&ShapedClock::update));
     timer->start(1000);
@@ -123,6 +124,10 @@ void ShapedClock::paintEvent(QPaintEvent *)
     painter.scale(side / 200.0, side / 200.0);
 
     painter.setPen(Qt::NoPen);
+    painter.setBrush(palette().window());
+    painter.drawEllipse(QPoint(0, 0), 98, 98);
+
+    painter.setPen(Qt::NoPen);
     painter.setBrush(hourColor);
 
     painter.save();
@@ -168,6 +173,6 @@ void ShapedClock::resizeEvent(QResizeEvent * /* event */)
 //! [5]
 QSize ShapedClock::sizeHint() const
 {
-    return QSize(100, 100);
+    return QSize(200, 200);
 }
 //! [5]
diff --git a/mkspecs/features/wasm/wasm.prf b/mkspecs/features/wasm/wasm.prf
index 25413d7470..5773e58010 100644
--- a/mkspecs/features/wasm/wasm.prf
+++ b/mkspecs/features/wasm/wasm.prf
@@ -71,7 +71,7 @@ contains(TEMPLATE, .*app) {
     # replacing the app name placeholder with the actual app name.
     apphtml.name = application main html file
     apphtml.output = $$DESTDIR/$$TARGET_HTML
-    apphtml.commands = sed -e s/@APPNAME@/$$TARGET_BASE/g $$WASM_PLUGIN_PATH/wasm_shell.html > $$DESTDIR/$$TARGET_HTML
+    apphtml.commands = $$QMAKE_STREAM_EDITOR -e s/@APPNAME@/$$TARGET_BASE/g $$WASM_PLUGIN_PATH/wasm_shell.html > $$DESTDIR/$$TARGET_HTML
     apphtml.input = $$WASM_PLUGIN_PATH/wasm_shell.html
     apphtml.depends = $$apphtml.input
     QMAKE_EXTRA_COMPILERS += apphtml
diff --git a/mkspecs/wasm-emscripten/qmake.conf b/mkspecs/wasm-emscripten/qmake.conf
index c69ed9af79..919dcfb214 100644
--- a/mkspecs/wasm-emscripten/qmake.conf
+++ b/mkspecs/wasm-emscripten/qmake.conf
@@ -25,7 +25,7 @@ EMTERP_FLAGS = \
     -s ASSERTIONS=1 \
     --profiling-funcs
 
-EMCC_COMMON_LFLAGS = \
+EMCC_COMMON_LFLAGS += \
     -s WASM=1 \
     -s FULL_ES2=1 \
     -s FULL_ES3=1 \
diff --git a/qmake/main.cpp b/qmake/main.cpp
index dd1cca9633..86f91031df 100644
--- a/qmake/main.cpp
+++ b/qmake/main.cpp
@@ -154,7 +154,7 @@ static int doSed(int argc, char **argv)
         FILE *f;
         if (!strcmp(inFile, "-")) {
             f = stdin;
-        } else if (!(f = fopen(inFile, "r"))) {
+        } else if (!(f = fopen(inFile, "rb"))) {
             perror(inFile);
             return 1;
         }
diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index 7cfbe1273f..fedf08301f 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -493,6 +493,39 @@
 #endif
 
 /*
+ * SG10's SD-6 feature detection and some useful extensions from Clang and GCC
+ * https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations
+ * http://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros
+ * Not using wrapper macros, per http://eel.is/c++draft/cpp.cond#7.sentence-2
+ */
+#ifndef __has_builtin
+#  define __has_builtin(x)             0
+#endif
+#ifndef __has_feature
+#  define __has_feature(x)             0
+#endif
+#ifndef __has_attribute
+#  define __has_attribute(x)           0
+#endif
+#ifndef __has_cpp_attribute
+#  define __has_cpp_attribute(x)       0
+#endif
+#ifndef __has_include
+#  define __has_include(x)             0
+#endif
+#ifndef __has_include_next
+#  define __has_include_next(x)        0
+#endif
+
+// Kept around until all submodules have transitioned
+#define QT_HAS_BUILTIN(x)        __has_builtin(x)
+#define QT_HAS_FEATURE(x)        __has_feature(x)
+#define QT_HAS_ATTRIBUTE(x)      __has_attribute(x)
+#define QT_HAS_CPP_ATTRIBUTE(x)  __has_cpp_attribute(x)
+#define QT_HAS_INCLUDE(x)        __has_include(x)
+#define QT_HAS_INCLUDE_NEXT(x)   __has_include_next(x)
+
+/*
  * C++11 support
  *
  *  Paper           Macro                               SD-6 macro
@@ -1019,37 +1052,6 @@
 #endif
 
 /*
- * SG10's SD-6 feature detection and some useful extensions from Clang and GCC
- * https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations
- * http://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros
- */
-#ifdef __has_builtin
-#  define QT_HAS_BUILTIN(x)             __has_builtin(x)
-#else
-#  define QT_HAS_BUILTIN(x)             0
-#endif
-#ifdef __has_attribute
-#  define QT_HAS_ATTRIBUTE(x)           __has_attribute(x)
-#else
-#  define QT_HAS_ATTRIBUTE(x)           0
-#endif
-#ifdef __has_cpp_attribute
-#  define QT_HAS_CPP_ATTRIBUTE(x)       __has_cpp_attribute(x)
-#else
-#  define QT_HAS_CPP_ATTRIBUTE(x)       0
-#endif
-#ifdef __has_include
-#  define QT_HAS_INCLUDE(x)             __has_include(x)
-#else
-#  define QT_HAS_INCLUDE(x)             0
-#endif
-#ifdef __has_include_next
-#  define QT_HAS_INCLUDE_NEXT(x)        __has_include_next(x)
-#else
-#  define QT_HAS_INCLUDE_NEXT(x)        0
-#endif
-
-/*
  * C++11 keywords and expressions
  */
 #ifdef Q_COMPILER_NULLPTR
@@ -1123,7 +1125,7 @@
 # define Q_DECL_ALIGN(n)   alignas(n)
 #endif
 
-#if QT_HAS_CPP_ATTRIBUTE(nodiscard) && !defined(Q_CC_CLANG)         // P0188R1
+#if __has_cpp_attribute(nodiscard) && !defined(Q_CC_CLANG)         // P0188R1
 // Can't use [[nodiscard]] with Clang, see https://bugs.llvm.org/show_bug.cgi?id=33518
 #  undef Q_REQUIRED_RESULT
 #  define Q_REQUIRED_RESULT [[nodiscard]]
@@ -1225,11 +1227,6 @@
 #ifndef QT_MAKE_CHECKED_ARRAY_ITERATOR
 #  define QT_MAKE_CHECKED_ARRAY_ITERATOR(x, N) (x)
 #endif
-#ifdef __has_feature
-#  define QT_HAS_FEATURE(x)             __has_feature(x)
-#else
-#  define QT_HAS_FEATURE(x)             0
-#endif
 
 /*
  * Warning/diagnostic handling
@@ -1320,11 +1317,11 @@
     } while (false)
 
 #if defined(__cplusplus)
-#if QT_HAS_CPP_ATTRIBUTE(clang::fallthrough)
+#if __has_cpp_attribute(clang::fallthrough)
 #    define Q_FALLTHROUGH() [[clang::fallthrough]]
-#elif QT_HAS_CPP_ATTRIBUTE(gnu::fallthrough)
+#elif __has_cpp_attribute(gnu::fallthrough)
 #    define Q_FALLTHROUGH() [[gnu::fallthrough]]
-#elif QT_HAS_CPP_ATTRIBUTE(fallthrough)
+#elif __has_cpp_attribute(fallthrough)
 #  define Q_FALLTHROUGH() [[fallthrough]]
 #endif
 #endif
diff --git a/src/corelib/global/qconfig-bootstrapped.h b/src/corelib/global/qconfig-bootstrapped.h
index c58dc56c42..2e6c3fbb20 100644
--- a/src/corelib/global/qconfig-bootstrapped.h
+++ b/src/corelib/global/qconfig-bootstrapped.h
@@ -77,13 +77,13 @@
 #define QT_FEATURE_binaryjson -1
 #define QT_FEATURE_cborstream -1
 #define QT_CRYPTOGRAPHICHASH_ONLY_SHA1
-#define QT_FEATURE_cxx11_random (QT_HAS_INCLUDE(<random>) ? 1 : -1)
+#define QT_FEATURE_cxx11_random (__has_include(<random>) ? 1 : -1)
 #define QT_NO_DATASTREAM
 #define QT_FEATURE_datestring 1
 #define QT_FEATURE_datetimeparser -1
 #define QT_FEATURE_easingcurve -1
 #define QT_FEATURE_etw -1
-#define QT_FEATURE_getauxval (QT_HAS_INCLUDE(<sys/auxv.h>) ? 1 : -1)
+#define QT_FEATURE_getauxval (__has_include(<sys/auxv.h>) ? 1 : -1)
 #define QT_FEATURE_getentropy -1
 #define QT_NO_GEOM_VARIANT
 #define QT_FEATURE_hijricalendar -1
diff --git a/src/corelib/global/qendian.h b/src/corelib/global/qendian.h
index 5cd9d3160b..257efbbdbe 100644
--- a/src/corelib/global/qendian.h
+++ b/src/corelib/global/qendian.h
@@ -66,7 +66,7 @@ template <typename T> Q_ALWAYS_INLINE void qToUnaligned(const T src, void *dest)
     // Using sizeof(T) inside memcpy function produces internal compiler error with
     // MSVC2008/ARM in tst_endian -> use extra indirection to resolve size of T.
     const size_t size = sizeof(T);
-#if QT_HAS_BUILTIN(__builtin_memcpy)
+#if __has_builtin(__builtin_memcpy)
     __builtin_memcpy
 #else
     memcpy
@@ -78,7 +78,7 @@ template <typename T> Q_ALWAYS_INLINE T qFromUnaligned(const void *src)
 {
     T dest;
     const size_t size = sizeof(T);
-#if QT_HAS_BUILTIN(__builtin_memcpy)
+#if __has_builtin(__builtin_memcpy)
     __builtin_memcpy
 #else
     memcpy
diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index 554c24356b..c2c91df756 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -92,7 +92,7 @@
 #  include <sys/systeminfo.h>
 #endif
 
-#if defined(Q_OS_DARWIN) && QT_HAS_INCLUDE(<IOKit/IOKitLib.h>)
+#if defined(Q_OS_DARWIN) && __has_include(<IOKit/IOKitLib.h>)
 #  include <IOKit/IOKitLib.h>
 #  include <private/qcore_mac_p.h>
 #endif
@@ -3067,7 +3067,7 @@ enum {
 */
 QByteArray QSysInfo::machineUniqueId()
 {
-#if defined(Q_OS_DARWIN) && QT_HAS_INCLUDE(<IOKit/IOKitLib.h>)
+#if defined(Q_OS_DARWIN) && __has_include(<IOKit/IOKitLib.h>)
     char uuid[UuidStringLen + 1];
     io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));
     QCFString stringRef = (CFStringRef)IORegistryEntryCreateCFProperty(service, CFSTR(kIOPlatformUUIDKey), kCFAllocatorDefault, 0);
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 4dc63cae5e..80433ebeff 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -717,7 +717,7 @@ inline void qt_noop(void) {}
 
 #if !defined(QT_NO_EXCEPTIONS)
 #  if !defined(Q_MOC_RUN)
-#    if (defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !QT_HAS_FEATURE(cxx_exceptions)) || \
+#    if (defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !__has_feature(cxx_exceptions)) || \
         (defined(Q_CC_GNU) && !defined(__EXCEPTIONS))
 #      define QT_NO_EXCEPTIONS
 #    endif
diff --git a/src/corelib/global/qglobal_p.h b/src/corelib/global/qglobal_p.h
index 58bc8b7bf3..5ab84fa8be 100644
--- a/src/corelib/global/qglobal_p.h
+++ b/src/corelib/global/qglobal_p.h
@@ -74,7 +74,7 @@ Q_CORE_EXPORT time_t qMkTime(struct tm *when);
 
 QT_END_NAMESPACE
 
-#if !QT_HAS_BUILTIN(__builtin_available)
+#if !__has_builtin(__builtin_available)
 #include <initializer_list>
 #include <QtCore/qoperatingsystemversion.h>
 #include <QtCore/qversionnumber.h>
@@ -142,7 +142,7 @@ QT_END_NAMESPACE
     QT_BUILTIN_AVAILABLE1, \
     QT_BUILTIN_AVAILABLE0, )
 #define __builtin_available(...) QT_BUILTIN_AVAILABLE_CHOOSER(__VA_ARGS__)(__VA_ARGS__)
-#endif // !QT_HAS_BUILTIN(__builtin_available)
+#endif // !__has_builtin(__builtin_available)
 #endif // defined(__cplusplus)
 
 #endif // QGLOBAL_P_H
diff --git a/src/corelib/global/qlogging.cpp b/src/corelib/global/qlogging.cpp
index e011645605..ca4d8dbd11 100644
--- a/src/corelib/global/qlogging.cpp
+++ b/src/corelib/global/qlogging.cpp
@@ -70,7 +70,7 @@
 #if QT_CONFIG(slog2)
 #include <sys/slog2.h>
 #endif
-#if QT_HAS_INCLUDE(<paths.h>)
+#if __has_include(<paths.h>)
 #include <paths.h>
 #endif
 
@@ -106,7 +106,7 @@
 #    if __UCLIBC_HAS_BACKTRACE__
 #      define QLOGGING_HAVE_BACKTRACE
 #    endif
-#  elif (defined(__GLIBC__) && defined(__GLIBCXX__)) || (QT_HAS_INCLUDE(<cxxabi.h>) && QT_HAS_INCLUDE(<execinfo.h>))
+#  elif (defined(__GLIBC__) && defined(__GLIBCXX__)) || (__has_include(<cxxabi.h>) && __has_include(<execinfo.h>))
 #    define QLOGGING_HAVE_BACKTRACE
 #  endif
 #endif
@@ -116,7 +116,7 @@ extern char *__progname;
 #endif
 
 #ifndef QT_BOOTSTRAPPED
-#if defined(Q_OS_LINUX) && (defined(__GLIBC__) || QT_HAS_INCLUDE(<sys/syscall.h>))
+#if defined(Q_OS_LINUX) && (defined(__GLIBC__) || __has_include(<sys/syscall.h>))
 #  include <sys/syscall.h>
 
 # if defined(Q_OS_ANDROID) && !defined(SYS_gettid)
@@ -1276,7 +1276,7 @@ void QMessagePattern::setPattern(const QString &pattern)
 #if defined(QLOGGING_HAVE_BACKTRACE) && !defined(QT_BOOTSTRAPPED)
 // make sure the function has "Message" in the name so the function is removed
 
-#if ((defined(Q_CC_GNU) && defined(QT_COMPILER_SUPPORTS_SIMD_ALWAYS)) || QT_HAS_ATTRIBUTE(optimize)) \
+#if ((defined(Q_CC_GNU) && defined(QT_COMPILER_SUPPORTS_SIMD_ALWAYS)) || __has_attribute(optimize)) \
     && !defined(Q_CC_INTEL) && !defined(Q_CC_CLANG)
 // force skipping the frame pointer, to save the backtrace() function some work
 __attribute__((optimize("omit-frame-pointer")))
diff --git a/src/corelib/global/qnumeric_p.h b/src/corelib/global/qnumeric_p.h
index c006296b3d..376da66e31 100644
--- a/src/corelib/global/qnumeric_p.h
+++ b/src/corelib/global/qnumeric_p.h
@@ -253,7 +253,7 @@ QT_WARNING_POP
 // size_t. Implementations for 8- and 16-bit types will work but may not be as
 // efficient. Implementations for 64-bit may be missing on 32-bit platforms.
 
-#if (defined(Q_CC_GNU) && (Q_CC_GNU >= 500) || (defined(Q_CC_INTEL) && !defined(Q_OS_WIN))) || QT_HAS_BUILTIN(__builtin_add_overflow)
+#if (defined(Q_CC_GNU) && (Q_CC_GNU >= 500) || (defined(Q_CC_INTEL) && !defined(Q_OS_WIN))) || __has_builtin(__builtin_add_overflow)
 // GCC 5, ICC 18, and Clang 3.8 have builtins to detect overflows
 
 template <typename T> inline
diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index 2e81f93bcf..3bbebc7fe9 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -55,7 +55,7 @@
 #include <stdio.h>
 #include <errno.h>
 
-#if QT_HAS_INCLUDE(<paths.h>)
+#if __has_include(<paths.h>)
 # include <paths.h>
 #endif
 #ifndef _PATH_TMP           // from <paths.h>
diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp
index ad2e7fb6b8..816026a36c 100644
--- a/src/corelib/io/qprocess.cpp
+++ b/src/corelib/io/qprocess.cpp
@@ -100,7 +100,7 @@ QT_END_NAMESPACE
 #include <private/qcore_unix_p.h>
 #endif
 
-#if QT_HAS_INCLUDE(<paths.h>)
+#if __has_include(<paths.h>)
 #include <paths.h>
 #endif
 
diff --git a/src/corelib/io/qstandardpaths.cpp b/src/corelib/io/qstandardpaths.cpp
index b62dc24b47..a5128a868b 100644
--- a/src/corelib/io/qstandardpaths.cpp
+++ b/src/corelib/io/qstandardpaths.cpp
@@ -48,7 +48,7 @@
 #include <qcoreapplication.h>
 #endif
 
-#if QT_HAS_INCLUDE(<paths.h>)
+#if __has_include(<paths.h>)
 #include <paths.h>
 #endif
 
diff --git a/src/corelib/io/qstorageinfo_unix.cpp b/src/corelib/io/qstorageinfo_unix.cpp
index 1e72241e68..37b8a60c37 100644
--- a/src/corelib/io/qstorageinfo_unix.cpp
+++ b/src/corelib/io/qstorageinfo_unix.cpp
@@ -108,7 +108,7 @@
 #  endif // QT_LARGEFILE_SUPPORT
 #endif // Q_OS_BSD4
 
-#if QT_HAS_INCLUDE(<paths.h>)
+#if __has_include(<paths.h>)
 #  include <paths.h>
 #endif
 #ifndef _PATH_MOUNTED
diff --git a/src/corelib/kernel/qdeadlinetimer.h b/src/corelib/kernel/qdeadlinetimer.h
index 9dd92481d2..99e09eb31f 100644
--- a/src/corelib/kernel/qdeadlinetimer.h
+++ b/src/corelib/kernel/qdeadlinetimer.h
@@ -52,7 +52,7 @@
 
 #include <limits>
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 #  include <chrono>
 #endif
 
@@ -120,7 +120,7 @@ public:
     QDeadlineTimer &operator-=(qint64 msecs)
     { *this = *this + (-msecs); return *this; }
 
-#if QT_HAS_INCLUDE(<chrono>) || defined(Q_CLANG_QDOC)
+#if __has_include(<chrono>) || defined(Q_CLANG_QDOC)
     template <class Clock, class Duration>
     QDeadlineTimer(std::chrono::time_point<Clock, Duration> deadline_,
                    Qt::TimerType type_ = Qt::CoarseTimer) : t2(0)
diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index ca5275a3ac..8d9cc3ab83 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -55,7 +55,7 @@
 
 #include <QtCore/qobject_impl.h>
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 #  include <chrono>
 #endif
 
@@ -154,7 +154,7 @@ public:
     void moveToThread(QThread *thread);
 
     int startTimer(int interval, Qt::TimerType timerType = Qt::CoarseTimer);
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     Q_ALWAYS_INLINE
     int startTimer(std::chrono::milliseconds time, Qt::TimerType timerType = Qt::CoarseTimer)
     {
diff --git a/src/corelib/kernel/qtimer.h b/src/corelib/kernel/qtimer.h
index eb7185c12d..6bbfd741d9 100644
--- a/src/corelib/kernel/qtimer.h
+++ b/src/corelib/kernel/qtimer.h
@@ -47,7 +47,7 @@
 #include <QtCore/qbasictimer.h> // conceptual inheritance
 #include <QtCore/qobject.h>
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 #  include <chrono>
 #endif
 
@@ -177,7 +177,7 @@ Q_SIGNALS:
     void timeout(QPrivateSignal);
 
 public:
-#if QT_HAS_INCLUDE(<chrono>) || defined(Q_QDOC)
+#if __has_include(<chrono>) || defined(Q_QDOC)
     void setInterval(std::chrono::milliseconds value)
     {
         setInterval(int(value.count()));
@@ -223,7 +223,7 @@ private:
     static void singleShotImpl(int msec, Qt::TimerType timerType,
                                const QObject *receiver, QtPrivate::QSlotObjectBase *slotObj);
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     static Qt::TimerType defaultTypeFor(std::chrono::milliseconds interval)
     { return defaultTypeFor(int(interval.count())); }
 
diff --git a/src/corelib/kernel/qvariant.h b/src/corelib/kernel/qvariant.h
index 0457b6fbad..24c7bd44dd 100644
--- a/src/corelib/kernel/qvariant.h
+++ b/src/corelib/kernel/qvariant.h
@@ -53,7 +53,7 @@
 #include <QtCore/qbytearraylist.h>
 #endif
 
-#if QT_HAS_INCLUDE(<variant>) && __cplusplus >= 201703L
+#if __has_include(<variant>) && __cplusplus >= 201703L
 #include <variant>
 #elif defined(Q_CLANG_QDOC)
 namespace std { template<typename...> struct variant; }
@@ -372,7 +372,7 @@ class Q_CORE_EXPORT QVariant
     static inline QVariant fromValue(const T &value)
     { return QVariant(qMetaTypeId<T>(), &value, QTypeInfo<T>::isPointer); }
 
-#if (QT_HAS_INCLUDE(<variant>) && __cplusplus >= 201703L) || defined(Q_CLANG_QDOC)
+#if (__has_include(<variant>) && __cplusplus >= 201703L) || defined(Q_CLANG_QDOC)
     template<typename... Types>
     static inline QVariant fromStdVariant(const std::variant<Types...> &value)
     {
@@ -538,7 +538,7 @@ inline QVariant QVariant::fromValue(const QVariant &value)
     return value;
 }
 
-#if QT_HAS_INCLUDE(<variant>) && __cplusplus >= 201703L
+#if __has_include(<variant>) && __cplusplus >= 201703L
 template<>
 inline QVariant QVariant::fromValue(const std::monostate &)
 {
diff --git a/src/corelib/serialization/qcborarray.h b/src/corelib/serialization/qcborarray.h
index e06544f245..fe06b8630f 100644
--- a/src/corelib/serialization/qcborarray.h
+++ b/src/corelib/serialization/qcborarray.h
@@ -214,7 +214,7 @@ public:
     bool contains(const QCborValue &value) const;
 
     int compare(const QCborArray &other) const noexcept Q_DECL_PURE_FUNCTION;
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
     std::strong_ordering operator<=>(const QCborArray &other) const
     {
         int c = compare(other);
diff --git a/src/corelib/serialization/qcbormap.h b/src/corelib/serialization/qcbormap.h
index 4aea901eef..6636ce776a 100644
--- a/src/corelib/serialization/qcbormap.h
+++ b/src/corelib/serialization/qcbormap.h
@@ -245,7 +245,7 @@ public:
     { const_iterator it = find(key); return it != end(); }
 
     int compare(const QCborMap &other) const noexcept Q_DECL_PURE_FUNCTION;
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
     std::strong_ordering operator<=>(const QCborMap &other) const
     {
         int c = compare(other);
diff --git a/src/corelib/serialization/qcborvalue.h b/src/corelib/serialization/qcborvalue.h
index 9c613dfcfb..071213e83a 100644
--- a/src/corelib/serialization/qcborvalue.h
+++ b/src/corelib/serialization/qcborvalue.h
@@ -59,7 +59,7 @@
 #  undef False
 #endif
 
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
 #  include <compare>
 #endif
 
@@ -265,7 +265,7 @@ public:
     QCborValueRef operator[](const QString & key);
 
     int compare(const QCborValue &other) const;
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
     std::strong_ordering operator<=>(const QCborValue &other) const
     {
         int c = compare(other);
@@ -421,7 +421,7 @@ public:
 
     int compare(const QCborValue &other) const
     { return concrete().compare(other); }
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
     std::strong_ordering operator<=>(const QCborValue &other) const
     {
         int c = compare(other);
diff --git a/src/corelib/serialization/qcborvalue_p.h b/src/corelib/serialization/qcborvalue_p.h
index b5d3de74fe..53ba81fa18 100644
--- a/src/corelib/serialization/qcborvalue_p.h
+++ b/src/corelib/serialization/qcborvalue_p.h
@@ -196,8 +196,7 @@ public:
         if (value.container)
             return replaceAt_complex(e, value, disp);
 
-        e.value = value.value_helper();
-        e.type = value.type();
+        e = { value.value_helper(), value.type() };
         if (value.isContainer())
             e.container = nullptr;
     }
diff --git a/src/corelib/text/qbytearray.cpp b/src/corelib/text/qbytearray.cpp
index 83182dbd93..23296896b2 100644
--- a/src/corelib/text/qbytearray.cpp
+++ b/src/corelib/text/qbytearray.cpp
@@ -334,7 +334,7 @@ int qstricmp(const char *str1, const char *str2)
         return int(Incomplete);
     };
 
-#if defined(__SSE4_1__) && !(defined(__SANITIZE_ADDRESS__) || QT_HAS_FEATURE(address_sanitizer))
+#if defined(__SSE4_1__) && !(defined(__SANITIZE_ADDRESS__) || __has_feature(address_sanitizer))
     enum { PageSize = 4096, PageMask = PageSize - 1 };
     const __m128i zero = _mm_setzero_si128();
     forever {
diff --git a/src/corelib/text/qbytearray.h b/src/corelib/text/qbytearray.h
index fa87ebf058..863898f7e2 100644
--- a/src/corelib/text/qbytearray.h
+++ b/src/corelib/text/qbytearray.h
@@ -243,7 +243,7 @@ public:
     void chop(int n);
 
 #if defined(Q_COMPILER_REF_QUALIFIERS) && !defined(QT_COMPILING_QSTRING_COMPAT_CPP) && !defined(Q_CLANG_QDOC)
-#  if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !QT_HAS_CPP_ATTRIBUTE(nodiscard)
+#  if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !__has_cpp_attribute(nodiscard)
     // required due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61941
 #    pragma push_macro("Q_REQUIRED_RESULT")
 #    undef Q_REQUIRED_RESULT
diff --git a/src/corelib/text/qstring.cpp b/src/corelib/text/qstring.cpp
index 0f313e21ed..e8ce637453 100644
--- a/src/corelib/text/qstring.cpp
+++ b/src/corelib/text/qstring.cpp
@@ -146,6 +146,9 @@ qsizetype qFindStringBoyerMoore(QStringView haystack, qsizetype from, QStringVie
 static inline qsizetype qFindChar(QStringView str, QChar ch, qsizetype from, Qt::CaseSensitivity cs) noexcept;
 template <typename Haystack>
 static inline qsizetype qLastIndexOf(Haystack haystack, QChar needle, qsizetype from, Qt::CaseSensitivity cs) noexcept;
+template <>
+inline qsizetype qLastIndexOf(QString haystack, QChar needle,
+                              qsizetype from, Qt::CaseSensitivity cs) noexcept = delete; // unwanted, would detach
 static inline qsizetype qt_string_count(QStringView haystack, QStringView needle, Qt::CaseSensitivity cs);
 static inline qsizetype qt_string_count(QStringView haystack, QChar needle, Qt::CaseSensitivity cs);
 
@@ -3813,7 +3816,7 @@ int QString::indexOf(const QStringRef &str, int from, Qt::CaseSensitivity cs) co
 int QString::lastIndexOf(const QString &str, int from, Qt::CaseSensitivity cs) const
 {
     // ### Qt6: qsizetype
-    return int(QtPrivate::lastIndexOf(*this, from, str, cs));
+    return int(QtPrivate::lastIndexOf(QStringView(*this), from, str, cs));
 }
 
 #endif // QT_STRINGVIEW_LEVEL < 2
@@ -3852,7 +3855,7 @@ int QString::lastIndexOf(QLatin1String str, int from, Qt::CaseSensitivity cs) co
 int QString::lastIndexOf(QChar ch, int from, Qt::CaseSensitivity cs) const
 {
     // ### Qt6: qsizetype
-    return int(qLastIndexOf(*this, ch, from, cs));
+    return int(qLastIndexOf(QStringView(*this), ch, from, cs));
 }
 
 #if QT_STRINGVIEW_LEVEL < 2
diff --git a/src/corelib/text/qstring.h b/src/corelib/text/qstring.h
index 27dc99b2e5..391e4788f2 100644
--- a/src/corelib/text/qstring.h
+++ b/src/corelib/text/qstring.h
@@ -485,7 +485,7 @@ public:
     Q_REQUIRED_RESULT QString rightJustified(int width, QChar fill = QLatin1Char(' '), bool trunc = false) const;
 
 #if defined(Q_COMPILER_REF_QUALIFIERS) && !defined(QT_COMPILING_QSTRING_COMPAT_CPP) && !defined(Q_CLANG_QDOC)
-#  if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !QT_HAS_CPP_ATTRIBUTE(nodiscard)
+#  if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !__has_cpp_attribute(nodiscard)
     // required due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61941
 #    pragma push_macro("Q_REQUIRED_RESULT")
 #    undef Q_REQUIRED_RESULT
diff --git a/src/corelib/thread/qfutex_p.h b/src/corelib/thread/qfutex_p.h
index 7bec4554b7..f287b752d7 100644
--- a/src/corelib/thread/qfutex_p.h
+++ b/src/corelib/thread/qfutex_p.h
@@ -81,7 +81,7 @@ QT_END_NAMESPACE
 // if not defined in linux/futex.h
 #  define FUTEX_PRIVATE_FLAG        128         // added in v2.6.22
 
-#  if QT_HAS_FEATURE(thread_sanitizer) || defined(__SANITIZE_THREAD__)
+#  if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)
 #    include <sanitizer/tsan_interface.h>
 inline void _q_tsan_acquire(void *addr, void *addr2)
 {
@@ -98,7 +98,7 @@ inline void _q_tsan_release(void *addr, void *addr2)
 #  else
 inline void _q_tsan_acquire(void *, void *) {}
 inline void _q_tsan_release(void *, void *) {}
-#  endif // QT_HAS_FEATURE(thread_sanitizer) || defined(__SANITIZE_THREAD__)
+#  endif // __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)
 
 QT_BEGIN_NAMESPACE
 namespace QtLinuxFutex {
diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h
index c693ff65d8..93c4bf23e8 100644
--- a/src/corelib/thread/qmutex.h
+++ b/src/corelib/thread/qmutex.h
@@ -44,7 +44,7 @@
 #include <QtCore/qatomic.h>
 #include <new>
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 #  include <chrono>
 #  include <limits>
 #endif
@@ -147,7 +147,7 @@ public:
     // Lockable concept
     bool try_lock() QT_MUTEX_LOCK_NOEXCEPT { return tryLock(); }
 
-#if QT_HAS_INCLUDE(<chrono>) || defined(Q_CLANG_QDOC)
+#if __has_include(<chrono>) || defined(Q_CLANG_QDOC)
     // TimedLockable concept
     template <class Rep, class Period>
     bool try_lock_for(std::chrono::duration<Rep, Period> duration)
@@ -175,7 +175,7 @@ private:
     friend class QRecursiveMutex;
     friend class ::tst_QMutex;
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     template<class Rep, class Period>
     static int convertToMilliseconds(std::chrono::duration<Rep, Period> duration)
     {
@@ -213,7 +213,7 @@ public:
     using QMutex::tryLock;
     using QMutex::unlock;
     using QMutex::try_lock;
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     using QMutex::try_lock_for;
     using QMutex::try_lock_until;
 #endif
@@ -295,7 +295,7 @@ public:
     inline void unlock() noexcept {}
     inline bool isRecursive() const noexcept { return true; }
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     template <class Rep, class Period>
     inline bool try_lock_for(std::chrono::duration<Rep, Period> duration) noexcept
     {
diff --git a/src/corelib/time/qdatetime.cpp b/src/corelib/time/qdatetime.cpp
index 979b8c9aeb..d2d09ceee6 100644
--- a/src/corelib/time/qdatetime.cpp
+++ b/src/corelib/time/qdatetime.cpp
@@ -127,7 +127,7 @@ static const char qt_shortMonthNames[][4] = {
     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
 };
 
-static int qt_monthNumberFromShortName(QStringRef shortName)
+static int qt_monthNumberFromShortName(QStringView shortName)
 {
     for (unsigned int i = 0; i < sizeof(qt_shortMonthNames) / sizeof(qt_shortMonthNames[0]); ++i) {
         if (shortName == QLatin1String(qt_shortMonthNames[i], 3))
@@ -136,9 +136,9 @@ static int qt_monthNumberFromShortName(QStringRef shortName)
     return -1;
 }
 static int qt_monthNumberFromShortName(const QString &shortName)
-{ return qt_monthNumberFromShortName(QStringRef(&shortName)); }
+{ return qt_monthNumberFromShortName(QStringView(shortName)); }
 
-static int fromShortMonthName(const QStringRef &monthName, int year)
+static int fromShortMonthName(QStringView monthName, int year)
 {
     // Assume that English monthnames are the default
     int month = qt_monthNumberFromShortName(monthName);
@@ -207,7 +207,7 @@ static QString toOffsetString(Qt::DateFormat format, int offset)
 
 #if QT_CONFIG(datestring)
 // Parse offset in [+-]HH[[:]mm] format
-static int fromOffsetString(const QStringRef &offsetString, bool *valid) noexcept
+static int fromOffsetString(QStringView offsetString, bool *valid) noexcept
 {
     *valid = false;
 
@@ -228,22 +228,23 @@ static int fromOffsetString(const QStringRef &offsetString, bool *valid) noexcep
         return 0;
 
     // Split the hour and minute parts
-    const QStringRef time = offsetString.mid(1);
-    int hhLen = time.indexOf(QLatin1Char(':'));
-    int mmIndex;
+    const QStringView time = offsetString.mid(1);
+    qsizetype hhLen = time.indexOf(QLatin1Char(':'));
+    qsizetype mmIndex;
     if (hhLen == -1)
         mmIndex = hhLen = 2; // [+-]HHmm or [+-]HH format
     else
         mmIndex = hhLen + 1;
 
-    const QStringRef hhRef = time.left(hhLen);
+    const QLocale C = QLocale::c();
+    const QStringView hhRef = time.left(qMin(hhLen, time.size()));
     bool ok = false;
-    const int hour = hhRef.toInt(&ok);
+    const int hour = C.toInt(hhRef, &ok);
     if (!ok)
         return 0;
 
-    const QStringRef mmRef = time.mid(mmIndex);
-    const int minute = mmRef.isEmpty() ? 0 : mmRef.toInt(&ok);
+    const QStringView mmRef = time.mid(qMin(mmIndex, time.size()));
+    const int minute = mmRef.isEmpty() ? 0 : C.toInt(mmRef, &ok);
     if (!ok || minute < 0 || minute > 59)
         return 0;
 
@@ -2324,7 +2325,7 @@ int QTime::msecsTo(const QTime &t) const
 
 #if QT_CONFIG(datestring)
 
-static QTime fromIsoTimeString(const QStringRef &string, Qt::DateFormat format, bool *isMidnight24)
+static QTime fromIsoTimeString(QStringView string, Qt::DateFormat format, bool *isMidnight24)
 {
     if (isMidnight24)
         *isMidnight24 = false;
@@ -2333,11 +2334,12 @@ static QTime fromIsoTimeString(const QStringRef &string, Qt::DateFormat format,
     if (size < 5)
         return QTime();
 
+    const QLocale C(QLocale::c());
     bool ok = false;
-    int hour = string.mid(0, 2).toInt(&ok);
+    int hour = C.toInt(string.mid(0, 2), &ok);
     if (!ok)
         return QTime();
-    const int minute = string.mid(3, 2).toInt(&ok);
+    const int minute = C.toInt(string.mid(3, 2), &ok);
     if (!ok)
         return QTime();
     int second = 0;
@@ -2358,11 +2360,11 @@ static QTime fromIsoTimeString(const QStringRef &string, Qt::DateFormat format,
         // seconds is 4. E.g. 12:34,99999 will expand to 12:34:59.9994. The milliseconds
         // will then be rounded up AND clamped to 999.
 
-        const QStringRef minuteFractionStr = string.mid(6, 5);
-        const long minuteFractionInt = minuteFractionStr.toLong(&ok);
+        const QStringView minuteFractionStr = string.mid(6, qMin(qsizetype(5), string.size() - 6));
+        const long minuteFractionInt = C.toLong(minuteFractionStr, &ok);
         if (!ok)
             return QTime();
-        const float minuteFraction = double(minuteFractionInt) / (std::pow(double(10), minuteFractionStr.count()));
+        const float minuteFraction = double(minuteFractionInt) / (std::pow(double(10), minuteFractionStr.size()));
 
         const float secondWithMs = minuteFraction * 60;
         const float secondNoMs = std::floor(secondWithMs);
@@ -2371,15 +2373,20 @@ static QTime fromIsoTimeString(const QStringRef &string, Qt::DateFormat format,
         msec = qMin(qRound(secondFraction * 1000.0), 999);
     } else {
         // HH:mm:ss or HH:mm:ss.zzz
-        second = string.mid(6, 2).toInt(&ok);
+        second = C.toInt(string.mid(6, qMin(qsizetype(2), string.size() - 6)), &ok);
         if (!ok)
             return QTime();
         if (size > 8 && (string.at(8) == QLatin1Char(',') || string.at(8) == QLatin1Char('.'))) {
-            const QStringRef msecStr(string.mid(9, 4));
-            int msecInt = msecStr.isEmpty() ? 0 : msecStr.toInt(&ok);
+            QStringView msecStr(string.mid(9, qMin(qsizetype(4), string.size() - 9)));
+            // toInt() ignores leading spaces, so catch them before calling it
+            if (!msecStr.isEmpty() && !msecStr.at(0).isDigit())
+                return QTime();
+            // We do, however, want to ignore *trailing* spaces.
+            msecStr = msecStr.trimmed();
+            int msecInt = msecStr.isEmpty() ? 0 : C.toInt(msecStr, &ok);
             if (!ok)
                 return QTime();
-            const double secondFraction(msecInt / (std::pow(double(10), msecStr.count())));
+            const double secondFraction(msecInt / (std::pow(double(10), msecStr.size())));
             msec = qMin(qRound(secondFraction * 1000.0), 999);
         }
     }
@@ -2428,7 +2435,7 @@ QTime QTime::fromString(const QString &string, Qt::DateFormat format)
     case Qt::ISODateWithMs:
     case Qt::TextDate:
     default:
-        return fromIsoTimeString(QStringRef(&string), format, nullptr);
+        return fromIsoTimeString(QStringView(string), format, nullptr);
     }
 }
 
@@ -3410,6 +3417,7 @@ inline qint64 QDateTimePrivate::zoneMSecsToEpochMSecs(qint64 zoneMSecs, const QT
                                                       DaylightStatus hint,
                                                       QDate *zoneDate, QTime *zoneTime)
 {
+    Q_ASSERT(zone.isValid());
     // Get the effective data from QTimeZone
     QTimeZonePrivate::Data data = zone.d->dataForLocalTime(zoneMSecs, int(hint));
     // Docs state any time before 1970-01-01 will *not* have any DST applied
@@ -3799,8 +3807,9 @@ QTimeZone QDateTime::timeZone() const
     case Qt::OffsetFromUTC:
         return QTimeZone(d->m_offsetFromUtc);
     case Qt::TimeZone:
-        Q_ASSERT(d->m_timeZone.isValid());
-        return d->m_timeZone;
+        if (d->m_timeZone.isValid())
+            return d->m_timeZone;
+        break;
     case Qt::LocalTime:
         return QTimeZone::systemTimeZone();
     }
@@ -3884,6 +3893,7 @@ QString QDateTime::timeZoneAbbreviation() const
 #if !QT_CONFIG(timezone)
         break;
 #else
+        Q_ASSERT(d->m_timeZone.isValid());
         return d->m_timeZone.d->abbreviation(toMSecsSinceEpoch());
 #endif // timezone
     case Qt::LocalTime:  {
@@ -3920,6 +3930,7 @@ bool QDateTime::isDaylightTime() const
 #if !QT_CONFIG(timezone)
         break;
 #else
+        Q_ASSERT(d->m_timeZone.isValid());
         return d->m_timeZone.d->isDaylightTime(toMSecsSinceEpoch());
 #endif // timezone
     case Qt::LocalTime: {
@@ -4044,6 +4055,10 @@ void QDateTime::setTimeZone(const QTimeZone &toZone)
 */
 qint64 QDateTime::toMSecsSinceEpoch() const
 {
+    // Note: QDateTimeParser relies on this producing a useful result, even when
+    // !isValid(), at least when the invalidity is a time in a fall-back (that
+    // we'll have adjusted to lie outside it, but marked invalid because it's
+    // not what was asked for). Other things may be doing similar.
     switch (getSpec(d)) {
     case Qt::UTC:
         return getMSecs(d);
@@ -4058,12 +4073,13 @@ qint64 QDateTime::toMSecsSinceEpoch() const
     }
 
     case Qt::TimeZone:
-#if !QT_CONFIG(timezone)
-        return 0;
-#else
-        return QDateTimePrivate::zoneMSecsToEpochMSecs(d->m_msecs, d->m_timeZone,
-                                                       extractDaylightStatus(getStatus(d)));
+#if QT_CONFIG(timezone)
+        if (d->m_timeZone.isValid()) {
+            return QDateTimePrivate::zoneMSecsToEpochMSecs(d->m_msecs, d->m_timeZone,
+                                                           extractDaylightStatus(getStatus(d)));
+        }
 #endif
+        return 0;
     }
     Q_UNREACHABLE();
     return 0;
@@ -4158,9 +4174,11 @@ void QDateTime::setMSecsSinceEpoch(qint64 msecs)
     case Qt::TimeZone:
         Q_ASSERT(!d.isShort());
 #if QT_CONFIG(timezone)
+        d.detach();
+        if (!d->m_timeZone.isValid())
+            break;
         // Docs state any LocalTime before 1970-01-01 will *not* have any DST applied
         // but all affected times afterwards will have DST applied.
-        d.detach();
         if (msecs >= 0) {
             status = mergeDaylightStatus(status,
                                          d->m_timeZone.d->isDaylightTime(msecs)
@@ -4433,7 +4451,7 @@ static inline void massageAdjustedDateTime(const QDateTimeData &d, QDate *date,
         QDateTimePrivate::DaylightStatus status = QDateTimePrivate::UnknownDaylightTime;
         localMSecsToEpochMSecs(timeToMSecs(*date, *time), &status, date, time);
 #if QT_CONFIG(timezone)
-    } else if (spec == Qt::TimeZone) {
+    } else if (spec == Qt::TimeZone && d->m_timeZone.isValid()) {
         QDateTimePrivate::zoneMSecsToEpochMSecs(timeToMSecs(*date, *time),
                                                 d->m_timeZone,
                                                 QDateTimePrivate::UnknownDaylightTime,
@@ -5094,7 +5112,8 @@ QDateTime QDateTime::fromMSecsSinceEpoch(qint64 msecs, const QTimeZone &timeZone
 {
     QDateTime dt;
     dt.setTimeZone(timeZone);
-    dt.setMSecsSinceEpoch(msecs);
+    if (timeZone.isValid())
+        dt.setMSecsSinceEpoch(msecs);
     return dt;
 }
 
@@ -5197,16 +5216,17 @@ QDateTime QDateTime::fromString(const QString &string, Qt::DateFormat format)
         if (!date.isValid())
             return QDateTime();
         if (size == 10)
-            return QDateTime(date);
+            return date.startOfDay();
 
         Qt::TimeSpec spec = Qt::LocalTime;
-        QStringRef isoString(&string);
-        isoString = isoString.mid(10); // trim "yyyy-MM-dd"
+        QStringView isoString = QStringView(string).mid(10); // trim "yyyy-MM-dd"
 
-        // Must be left with T and at least one digit for the hour:
+        // Must be left with T (or space) and at least one digit for the hour:
         if (isoString.size() < 2
-            || !(isoString.startsWith(QLatin1Char('T'))
-                 // FIXME: QSql relies on QVariant::toDateTime() accepting a space here:
+            || !(isoString.startsWith(QLatin1Char('T'), Qt::CaseInsensitive)
+                 // RFC 3339 (section 5.6) allows a space here.  (It actually
+                 // allows any separator one considers more readable, merely
+                 // giving space as an example - but let's not go wild !)
                  || isoString.startsWith(QLatin1Char(' ')))) {
             return QDateTime();
         }
@@ -5214,7 +5234,7 @@ QDateTime QDateTime::fromString(const QString &string, Qt::DateFormat format)
 
         int offset = 0;
         // Check end of string for Time Zone definition, either Z for UTC or [+-]HH:mm for Offset
-        if (isoString.endsWith(QLatin1Char('Z'))) {
+        if (isoString.endsWith(QLatin1Char('Z'), Qt::CaseInsensitive)) {
             spec = Qt::UTC;
             isoString.chop(1); // trim 'Z'
         } else {
@@ -5345,7 +5365,7 @@ QDateTime QDateTime::fromString(const QString &string, Qt::DateFormat format)
         if (parts.count() == 5)
             return QDateTime(date, time, Qt::LocalTime);
 
-        QStringRef tz = parts.at(5);
+        QStringView tz = parts.at(5);
         if (!tz.startsWith(QLatin1String("GMT"), Qt::CaseInsensitive))
             return QDateTime();
         tz = tz.mid(3);
diff --git a/src/corelib/time/qdatetimeparser.cpp b/src/corelib/time/qdatetimeparser.cpp
index a487534528..fa0884c827 100644
--- a/src/corelib/time/qdatetimeparser.cpp
+++ b/src/corelib/time/qdatetimeparser.cpp
@@ -1363,7 +1363,7 @@ QDateTimeParser::scanString(const QDateTime &defaultValue,
     // given date (which might be a spring-forward, skipping an hour).
     if (parserType == QVariant::DateTime && !(isSet & HourSectionMask) && !when.isValid()) {
         qint64 msecs = when.toMSecsSinceEpoch();
-        // Fortunately, that gets a useful answer ...
+        // Fortunately, that gets a useful answer, even though when is invalid ...
         const QDateTime replace =
 #if QT_CONFIG(timezone)
             tspec == Qt::TimeZone
diff --git a/src/corelib/time/qtimezoneprivate.cpp b/src/corelib/time/qtimezoneprivate.cpp
index 7d6ef0a404..facdf6661d 100644
--- a/src/corelib/time/qtimezoneprivate.cpp
+++ b/src/corelib/time/qtimezoneprivate.cpp
@@ -381,18 +381,15 @@ QTimeZonePrivate::Data QTimeZonePrivate::dataForLocalTime(qint64 forLocalMSecs,
                   On the first pass, the case we consider is what hint told us to expect
                   (except when hint was -1 and didn't actually tell us what to expect),
                   so it's likely right.  We only get a second pass if the first failed,
-                  by which time the second case, that we're trying, is likely right.  If
-                  an overwhelming majority of calls have hint == -1, the Q_LIKELY here
-                  shall be wrong half the time; otherwise, its errors shall be rarer
-                  than that.
+                  by which time the second case, that we're trying, is likely right.
                 */
                 if (nextFirst ? i == 0 : i) {
                     Q_ASSERT(nextStart != invalidMSecs());
-                    if (Q_LIKELY(nextStart <= nextTran.atMSecsSinceEpoch))
+                    if (nextStart <= nextTran.atMSecsSinceEpoch)
                         return nextTran;
                 } else {
                     // If next is invalid, nextFirst is false, to route us here first:
-                    if (nextStart == invalidMSecs() || Q_LIKELY(nextStart > tran.atMSecsSinceEpoch))
+                    if (nextStart == invalidMSecs() || nextStart > tran.atMSecsSinceEpoch)
                         return tran;
                 }
             }
@@ -421,7 +418,7 @@ QTimeZonePrivate::Data QTimeZonePrivate::dataForLocalTime(qint64 forLocalMSecs,
 
     int early = offsetFromUtc(recent);
     int late = offsetFromUtc(imminent);
-    if (Q_LIKELY(early == late)) { // > 99% of the time
+    if (early == late) { // > 99% of the time
         utcEpochMSecs = forLocalMSecs - early * 1000;
     } else {
         // Close to a DST transition: early > late is near a fall-back,
@@ -433,7 +430,7 @@ QTimeZonePrivate::Data QTimeZonePrivate::dataForLocalTime(qint64 forLocalMSecs,
         const qint64 forStd = forLocalMSecs - offsetInStd * 1000;
         // Best guess at the answer:
         const qint64 hinted = hint > 0 ? forDst : forStd;
-        if (Q_LIKELY(offsetFromUtc(hinted) == (hint > 0 ? offsetInDst : offsetInStd))) {
+        if (offsetFromUtc(hinted) == (hint > 0 ? offsetInDst : offsetInStd)) {
             utcEpochMSecs = hinted;
         } else if (hint <= 0 && offsetFromUtc(forDst) == offsetInDst) {
             utcEpochMSecs = forDst;
diff --git a/src/corelib/tools/qalgorithms.h b/src/corelib/tools/qalgorithms.h
index b01ce0db58..aa79e0d4a9 100644
--- a/src/corelib/tools/qalgorithms.h
+++ b/src/corelib/tools/qalgorithms.h
@@ -535,7 +535,7 @@ QT_DEPRECATED_X("Use std::binary_search") Q_OUTOFLINE_TEMPLATE RandomAccessItera
 #  define QT_HAS_BUILTIN_CTZS
 Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_ctzs(quint16 v) noexcept
 {
-#  if QT_HAS_BUILTIN(__builtin_ctzs)
+#  if __has_builtin(__builtin_ctzs)
     return __builtin_ctzs(v);
 #  else
     return __builtin_ctz(v);
@@ -544,7 +544,7 @@ Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_ctzs(quint16 v) noexcept
 #define QT_HAS_BUILTIN_CLZS
 Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_clzs(quint16 v) noexcept
 {
-#  if QT_HAS_BUILTIN(__builtin_clzs)
+#  if __has_builtin(__builtin_clzs)
     return __builtin_clzs(v);
 #  else
     return __builtin_clz(v) - 16U;
diff --git a/src/corelib/tools/qscopeguard.h b/src/corelib/tools/qscopeguard.h
index 45c3f93da4..40d2747b1d 100644
--- a/src/corelib/tools/qscopeguard.h
+++ b/src/corelib/tools/qscopeguard.h
@@ -51,7 +51,7 @@ template <typename F> QScopeGuard<F> qScopeGuard(F f);
 
 template <typename F>
 class
-#if QT_HAS_CPP_ATTRIBUTE(nodiscard)
+#if __has_cpp_attribute(nodiscard)
 // Q_REQUIRED_RESULT can be defined as __warn_unused_result__ or as [[nodiscard]]
 // but the 1st one has some limitations for example can be placed only on functions.
 Q_REQUIRED_RESULT
@@ -91,7 +91,7 @@ private:
 
 
 template <typename F>
-#if QT_HAS_CPP_ATTRIBUTE(nodiscard)
+#if __has_cpp_attribute(nodiscard)
 Q_REQUIRED_RESULT
 #endif
 QScopeGuard<F> qScopeGuard(F f)
diff --git a/src/gui/kernel/qplatformcursor.cpp b/src/gui/kernel/qplatformcursor.cpp
index 12065078c1..5a438a54a2 100644
--- a/src/gui/kernel/qplatformcursor.cpp
+++ b/src/gui/kernel/qplatformcursor.cpp
@@ -131,6 +131,14 @@ void QPlatformCursor::setPos(const QPoint &pos)
     QWindowSystemInterface::handleMouseEvent(nullptr, pos, pos, Qt::NoButton, Qt::NoButton, QEvent::MouseMove);
 }
 
+/*!
+    Returns the size of the cursor, in native pixels.
+*/
+QSize QPlatformCursor::size() const
+{
+    return QSize(16, 16);
+}
+
 // End of display and pointer event handling code
 // Beginning of built-in cursor graphics
 // from src/gui/embedded/QGraphicsSystemCursorImage_qws.cpp
diff --git a/src/gui/kernel/qplatformcursor.h b/src/gui/kernel/qplatformcursor.h
index f36a73c861..f3871d8780 100644
--- a/src/gui/kernel/qplatformcursor.h
+++ b/src/gui/kernel/qplatformcursor.h
@@ -96,6 +96,7 @@ public:
 #endif // QT_NO_CURSOR
     virtual QPoint pos() const;
     virtual void setPos(const QPoint &pos);
+    virtual QSize size() const;
 
     static Capabilities capabilities() { return m_capabilities; }
     static void setCapabilities(Capabilities c) { m_capabilities = c; }
diff --git a/src/gui/painting/qcolorspace.cpp b/src/gui/painting/qcolorspace.cpp
index 937bb505c9..9631fdb416 100644
--- a/src/gui/painting/qcolorspace.cpp
+++ b/src/gui/painting/qcolorspace.cpp
@@ -784,10 +784,12 @@ QDebug operator<<(QDebug dbg, const QColorSpace &colorSpace)
     QDebugStateSaver saver(dbg);
     dbg.nospace();
     dbg << "QColorSpace(";
-    if (colorSpace.d_ptr->namedColorSpace)
-        dbg << colorSpace.d_ptr->namedColorSpace << ", ";
-    dbg << colorSpace.primaries() << ", " << colorSpace.transferFunction();
-    dbg << ", gamma=" << colorSpace.gamma();
+    if (colorSpace.d_ptr) {
+        if (colorSpace.d_ptr->namedColorSpace)
+            dbg << colorSpace.d_ptr->namedColorSpace << ", ";
+        dbg << colorSpace.primaries() << ", " << colorSpace.transferFunction();
+        dbg << ", gamma=" << colorSpace.gamma();
+    }
     dbg << ')';
     return dbg;
 }
diff --git a/src/gui/rhi/qrhigles2.cpp b/src/gui/rhi/qrhigles2.cpp
index 563d59b318..3fb2ec38a7 100644
--- a/src/gui/rhi/qrhigles2.cpp
+++ b/src/gui/rhi/qrhigles2.cpp
@@ -2428,7 +2428,15 @@ void QRhiGles2::bindShaderResources(QRhiGraphicsPipeline *maybeGraphicsPs, QRhiC
                         f->glUniformMatrix2fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(src));
                         break;
                     case QShaderDescription::Mat3:
-                        f->glUniformMatrix3fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(src));
+                    {
+                        // 4 floats per column (or row, if row-major)
+                        float mat[9];
+                        const float *srcMat = reinterpret_cast<const float *>(src);
+                        memcpy(mat, srcMat, 3 * sizeof(float));
+                        memcpy(mat + 3, srcMat + 4, 3 * sizeof(float));
+                        memcpy(mat + 6, srcMat + 8, 3 * sizeof(float));
+                        f->glUniformMatrix3fv(uniform.glslLocation, 1, GL_FALSE, mat);
+                    }
                         break;
                     case QShaderDescription::Mat4:
                         f->glUniformMatrix4fv(uniform.glslLocation, 1, GL_FALSE, reinterpret_cast<const float *>(src));
@@ -2919,21 +2927,64 @@ bool QRhiGles2::linkProgram(GLuint program)
     return true;
 }
 
-void QRhiGles2::gatherUniforms(GLuint program, const QShaderDescription::UniformBlock &ub,
+void QRhiGles2::registerUniformIfActive(const QShaderDescription::BlockVariable &var,
+                                        const QByteArray &namePrefix,
+                                        int binding,
+                                        int baseOffset,
+                                        GLuint program,
+                                        QVector<QGles2UniformDescription> *dst)
+{
+    if (var.type == QShaderDescription::Struct) {
+        qWarning("Nested structs are not supported at the moment. '%s' ignored.",
+                 qPrintable(var.name));
+        return;
+    }
+    QGles2UniformDescription uniform;
+    uniform.type = var.type;
+    const QByteArray name = namePrefix + var.name.toUtf8();
+    uniform.glslLocation = f->glGetUniformLocation(program, name.constData());
+    if (uniform.glslLocation >= 0) {
+        uniform.binding = binding;
+        uniform.offset = uint(baseOffset + var.offset);
+        uniform.size = var.size;
+        dst->append(uniform);
+    }
+}
+
+void QRhiGles2::gatherUniforms(GLuint program,
+                               const QShaderDescription::UniformBlock &ub,
                                QVector<QGles2UniformDescription> *dst)
 {
-    const QByteArray prefix = ub.structName.toUtf8() + '.';
+    QByteArray prefix = ub.structName.toUtf8() + '.';
     for (const QShaderDescription::BlockVariable &blockMember : ub.members) {
-        // ### no array support for now
-        QGles2UniformDescription uniform;
-        uniform.type = blockMember.type;
-        const QByteArray name = prefix + blockMember.name.toUtf8();
-        uniform.glslLocation = f->glGetUniformLocation(program, name.constData());
-        if (uniform.glslLocation >= 0) {
-            uniform.binding = ub.binding;
-            uniform.offset = uint(blockMember.offset);
-            uniform.size = blockMember.size;
-            dst->append(uniform);
+        if (blockMember.type == QShaderDescription::Struct) {
+            prefix += blockMember.name.toUtf8();
+            const int baseOffset = blockMember.offset;
+            if (blockMember.arrayDims.isEmpty()) {
+                for (const QShaderDescription::BlockVariable &structMember : blockMember.structMembers)
+                    registerUniformIfActive(structMember, prefix, ub.binding, baseOffset, program, dst);
+            } else {
+                if (blockMember.arrayDims.count() > 1) {
+                    qWarning("Array of struct '%s' has more than one dimension. Only the first dimension is used.",
+                             qPrintable(blockMember.name));
+                }
+                const int dim = blockMember.arrayDims.first();
+                const int elemSize = blockMember.size / dim;
+                int elemOffset = baseOffset;
+                for (int di = 0; di < dim; ++di) {
+                    const QByteArray arrayPrefix = prefix + '[' + QByteArray::number(di) + ']' + '.';
+                    for (const QShaderDescription::BlockVariable &structMember : blockMember.structMembers)
+                        registerUniformIfActive(structMember, arrayPrefix, ub.binding, elemOffset, program, dst);
+                    elemOffset += elemSize;
+                }
+            }
+        } else {
+            if (!blockMember.arrayDims.isEmpty()) {
+                qWarning("Arrays are only supported for structs at the moment. '%s' ignored.",
+                         qPrintable(blockMember.name));
+                continue;
+            }
+            registerUniformIfActive(blockMember, prefix, ub.binding, 0, program, dst);
         }
     }
 }
diff --git a/src/gui/rhi/qrhigles2_p_p.h b/src/gui/rhi/qrhigles2_p_p.h
index 0283fadb4e..4a98011d3d 100644
--- a/src/gui/rhi/qrhigles2_p_p.h
+++ b/src/gui/rhi/qrhigles2_p_p.h
@@ -706,7 +706,14 @@ public:
     QByteArray shaderSource(const QRhiShaderStage &shaderStage, int *glslVersion);
     bool compileShader(GLuint program, const QRhiShaderStage &shaderStage, int *glslVersion);
     bool linkProgram(GLuint program);
-    void gatherUniforms(GLuint program, const QShaderDescription::UniformBlock &ub,
+    void registerUniformIfActive(const QShaderDescription::BlockVariable &var,
+                                 const QByteArray &namePrefix,
+                                 int binding,
+                                 int baseOffset,
+                                 GLuint program,
+                                 QVector<QGles2UniformDescription> *dst);
+    void gatherUniforms(GLuint program,
+                        const QShaderDescription::UniformBlock &ub,
                         QVector<QGles2UniformDescription> *dst);
     void gatherSamplers(GLuint program, const QShaderDescription::InOutVariable &v,
                         QVector<QGles2SamplerDescription> *dst);
diff --git a/src/gui/rhi/qrhimetal.mm b/src/gui/rhi/qrhimetal.mm
index 555ed5e79f..3aa68db585 100644
--- a/src/gui/rhi/qrhimetal.mm
+++ b/src/gui/rhi/qrhimetal.mm
@@ -3215,7 +3215,10 @@ id<MTLLibrary> QRhiMetalData::createMetalLib(const QShader &shader, QShader::Var
     [opts release];
     // src is autoreleased
 
-    if (err) {
+    // if lib is null and err is non-null, we had errors (fail)
+    // if lib is non-null and err is non-null, we had warnings (success)
+    // if lib is non-null and err is null, there were no errors or warnings (success)
+    if (!lib) {
         const QString msg = QString::fromNSString(err.localizedDescription);
         *error = msg;
         return nil;
diff --git a/src/gui/text/qtextcursor.cpp b/src/gui/text/qtextcursor.cpp
index b69b94d4e7..fa323ef4bd 100644
--- a/src/gui/text/qtextcursor.cpp
+++ b/src/gui/text/qtextcursor.cpp
@@ -2261,6 +2261,7 @@ void QTextCursor::insertFragment(const QTextDocumentFragment &fragment)
     d->remove();
     fragment.d->insert(*this);
     d->priv->endEditBlock();
+    d->setX();
 
     if (fragment.d && fragment.d->doc)
         d->priv->mergeCachedResources(fragment.d->doc->docHandle());
diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index 3382ec0b69..1d27cc30eb 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -347,7 +347,19 @@ QTextDocument *QTextDocument::clone(QObject *parent) const
 {
     Q_D(const QTextDocument);
     QTextDocument *doc = new QTextDocument(parent);
-    QTextCursor(doc).insertFragment(QTextDocumentFragment(this));
+    if (isEmpty()) {
+        const QTextCursor thisCursor(const_cast<QTextDocument *>(this));
+
+        const auto blockFormat = thisCursor.blockFormat();
+        if (blockFormat.isValid() && !blockFormat.isEmpty())
+            QTextCursor(doc).setBlockFormat(blockFormat);
+
+        const auto blockCharFormat = thisCursor.blockCharFormat();
+        if (blockCharFormat.isValid() && !blockCharFormat.isEmpty())
+            QTextCursor(doc).setBlockCharFormat(blockCharFormat);
+    } else {
+        QTextCursor(doc).insertFragment(QTextDocumentFragment(this));
+    }
     doc->rootFrame()->setFrameFormat(rootFrame()->frameFormat());
     QTextDocumentPrivate *priv = doc->d_func();
     priv->title = d->title;
diff --git a/src/plugins/platforms/cocoa/qcocoaclipboard.mm b/src/plugins/platforms/cocoa/qcocoaclipboard.mm
index a35c153084..141940cc50 100644
--- a/src/plugins/platforms/cocoa/qcocoaclipboard.mm
+++ b/src/plugins/platforms/cocoa/qcocoaclipboard.mm
@@ -67,7 +67,7 @@ void QCocoaClipboard::setMimeData(QMimeData *data, QClipboard::Mode mode)
         }
 
         pasteBoard->sync();
-        pasteBoard->setMimeData(data);
+        pasteBoard->setMimeData(data, QMacPasteboard::LazyRequest);
         emitChanged(mode);
     }
 }
diff --git a/src/plugins/platforms/cocoa/qcocoacursor.h b/src/plugins/platforms/cocoa/qcocoacursor.h
index 58b9ef2151..5b008eff35 100644
--- a/src/plugins/platforms/cocoa/qcocoacursor.h
+++ b/src/plugins/platforms/cocoa/qcocoacursor.h
@@ -56,6 +56,9 @@ public:
     void changeCursor(QCursor *cursor, QWindow *window) override;
     QPoint pos() const override;
     void setPos(const QPoint &position) override;
+
+    QSize size() const override;
+
 private:
     QHash<Qt::CursorShape, NSCursor *> m_cursors;
     NSCursor *convertCursor(QCursor *cursor);
diff --git a/src/plugins/platforms/cocoa/qcocoacursor.mm b/src/plugins/platforms/cocoa/qcocoacursor.mm
index 87a57c78c8..e0d623fc4c 100644
--- a/src/plugins/platforms/cocoa/qcocoacursor.mm
+++ b/src/plugins/platforms/cocoa/qcocoacursor.mm
@@ -85,6 +85,31 @@ void QCocoaCursor::setPos(const QPoint &position)
     CFRelease(e);
 }
 
+
+QSize QCocoaCursor::size() const
+{
+    NSCursor *cocoaCursor = NSCursor.currentSystemCursor;
+    if (!cocoaCursor)
+        return QPlatformCursor::size();
+    NSImage *cursorImage = cocoaCursor.image;
+    if (!cursorImage)
+        return QPlatformCursor::size();
+
+    QSizeF size = QSizeF::fromCGSize(cursorImage.size);
+    NSUserDefaults *defaults = NSUserDefaults.standardUserDefaults;
+    NSDictionary *accessSettings = [defaults persistentDomainForName:@"com.apple.universalaccess"];
+    if (accessSettings == nil)
+        return size.toSize();
+
+    float sizeScale = [accessSettings[@"mouseDriverCursorSize"] floatValue];
+    if (sizeScale > 0) {
+        size.rwidth() *= sizeScale;
+        size.rheight() *= sizeScale;
+    }
+
+    return size.toSize();
+}
+
 NSCursor *QCocoaCursor::convertCursor(QCursor *cursor)
 {
     if (!cursor)
diff --git a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
index 69587a24be..b8d2532b8e 100644
--- a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
+++ b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.h
@@ -186,6 +186,7 @@ public:
     QAtomicInt serialNumber;
     int lastSerial;
     bool interrupt;
+    bool propagateInterrupt = false;
 
     static void postedEventsSourceCallback(void *info);
     static void waitingObserverCallback(CFRunLoopObserverRef observer,
diff --git a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
index 110c82bf1f..94b9e62eab 100644
--- a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
+++ b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
@@ -84,13 +84,12 @@
 #include "private/qthread_p.h"
 #include "private/qguiapplication_p.h"
 #include <qdebug.h>
+#include <qscopeguard.h>
 
 #include <AppKit/AppKit.h>
 
 QT_BEGIN_NAMESPACE
 
-QT_USE_NAMESPACE
-
 static inline CFRunLoopRef mainRunLoop()
 {
     return CFRunLoopGetMain();
@@ -348,6 +347,16 @@ static inline void qt_mac_waitForMoreEvents(NSString *runLoopMode = NSDefaultRun
 bool QCocoaEventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags)
 {
     Q_D(QCocoaEventDispatcher);
+
+    // In rare rather corner cases a user's application messes with
+    // QEventLoop::exec()/exit() and QCoreApplication::processEvents(),
+    // we have to undo what bool blocker normally does.
+    d->propagateInterrupt = false;
+    const auto boolBlockerUndo = qScopeGuard([d](){
+        if (d->propagateInterrupt)
+            d->interrupt = true;
+        d->propagateInterrupt = false;
+    });
     QBoolBlocker interruptBlocker(d->interrupt, false);
 
     bool interruptLater = false;
@@ -496,7 +505,16 @@ bool QCocoaEventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags)
 
             if ((d->processEventsFlags & QEventLoop::EventLoopExec) == 0) {
                 // When called "manually", always process posted events and timers
+                bool oldInterrupt = d->interrupt;
                 d->processPostedEvents();
+                if (!oldInterrupt && d->interrupt && !d->currentModalSession()) {
+                    // We had direct processEvent call, coming not from QEventLoop::exec().
+                    // One of the posted events triggered an application to interrupt the loop.
+                    // But bool blocker will reset d->interrupt to false, so the real event
+                    // loop will never notice it was interrupted. Now we'll have to fix it by
+                    // enforcing the value of d->interrupt.
+                    d->propagateInterrupt = true;
+                }
                 retVal = d->processTimers() || retVal;
             }
 
diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.h b/src/plugins/platforms/cocoa/qcocoaglcontext.h
index 4210a4ed3f..238067568b 100644
--- a/src/plugins/platforms/cocoa/qcocoaglcontext.h
+++ b/src/plugins/platforms/cocoa/qcocoaglcontext.h
@@ -86,6 +86,10 @@ private:
     QSurfaceFormat m_format;
     QVarLengthArray<QMacNotificationObserver, 3> m_updateObservers;
     QAtomicInt m_needsUpdate = false;
+
+#ifndef QT_NO_DEBUG_STREAM
+    friend QDebug operator<<(QDebug debug, const QCocoaGLContext *screen);
+#endif
 };
 
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.mm b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
index b312e033cd..6db4bdb9fd 100644
--- a/src/plugins/platforms/cocoa/qcocoaglcontext.mm
+++ b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
@@ -158,6 +158,8 @@ void QCocoaGLContext::initialize()
     [m_context setValues:&order forParameter:NSOpenGLCPSurfaceOrder];
 
     updateSurfaceFormat();
+
+    qCDebug(lcQpaOpenGLContext).verbosity(3) << "Created" << this << "based on requested" << context()->format();
 }
 
 NSOpenGLPixelFormat *QCocoaGLContext::pixelFormatForSurfaceFormat(const QSurfaceFormat &format)
@@ -355,7 +357,7 @@ QCocoaGLContext::~QCocoaGLContext()
 
 bool QCocoaGLContext::makeCurrent(QPlatformSurface *surface)
 {
-    qCDebug(lcQpaOpenGLContext) << "Making" << m_context << "current"
+    qCDebug(lcQpaOpenGLContext) << "Making" << this << "current"
         << "in" << QThread::currentThread() << "for" << surface;
 
     Q_ASSERT(surface->surface()->supportsOpenGL());
@@ -555,4 +557,20 @@ QFunctionPointer QCocoaGLContext::getProcAddress(const char *procName)
     return (QFunctionPointer)dlsym(RTLD_DEFAULT, procName);
 }
 
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug debug, const QCocoaGLContext *context)
+{
+    QDebugStateSaver saver(debug);
+    debug.nospace();
+    debug << "QCocoaGLContext(" << (const void *)context;
+    if (context) {
+        if (debug.verbosity() > QDebug::DefaultVerbosity)
+            debug << ", " << context->format();
+        debug << ", " << context->nativeContext();
+    }
+    debug << ')';
+    return debug;
+}
+#endif // !QT_NO_DEBUG_STREAM
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index 643eac1e92..ad232d6d80 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -559,7 +559,10 @@ void QCocoaWindow::setWindowFlags(Qt::WindowFlags flags)
     Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));
     if ((type & Qt::Popup) != Qt::Popup && (type & Qt::Dialog) != Qt::Dialog) {
         NSWindowCollectionBehavior behavior = m_view.window.collectionBehavior;
-        if ((flags & Qt::WindowFullscreenButtonHint) || m_view.window.qt_fullScreen) {
+        const bool enableFullScreen = m_view.window.qt_fullScreen
+                                    || !(flags & Qt::CustomizeWindowHint)
+                                    || (flags & Qt::WindowFullscreenButtonHint);
+        if (enableFullScreen) {
             behavior |= NSWindowCollectionBehaviorFullScreenPrimary;
             behavior &= ~NSWindowCollectionBehaviorFullScreenAuxiliary;
         } else {
diff --git a/src/plugins/platforms/cocoa/qmacclipboard.mm b/src/plugins/platforms/cocoa/qmacclipboard.mm
index 358a6b49fd..654647b35a 100644
--- a/src/plugins/platforms/cocoa/qmacclipboard.mm
+++ b/src/plugins/platforms/cocoa/qmacclipboard.mm
@@ -138,8 +138,12 @@ QMacPasteboard::QMacPasteboard(CFStringRef name, uchar mt)
 
 QMacPasteboard::~QMacPasteboard()
 {
-    // commit all promises for paste after exit close
-    resolvingBeforeDestruction = true;
+    /*
+        Commit all promises for paste when shutting down,
+        unless we are the stack-allocated clipboard used by QCocoaDrag.
+    */
+    if (mime_type == QMacInternalPasteboardMime::MIME_DND)
+        resolvingBeforeDestruction = true;
     PasteboardResolvePromises(paste);
     if (paste)
         CFRelease(paste);
diff --git a/src/plugins/platforms/qnx/qqnxscreeneventthread.cpp b/src/plugins/platforms/qnx/qqnxscreeneventthread.cpp
index 1b5f3b4954..491c314488 100644
--- a/src/plugins/platforms/qnx/qqnxscreeneventthread.cpp
+++ b/src/plugins/platforms/qnx/qqnxscreeneventthread.cpp
@@ -60,6 +60,18 @@ static const int c_screenCode = _PULSE_CODE_MINAVAIL + 0;
 static const int c_armCode = _PULSE_CODE_MINAVAIL + 1;
 static const int c_quitCode = _PULSE_CODE_MINAVAIL + 2;
 
+#if !defined(screen_register_event)
+int screen_register_event(screen_context_t, struct sigevent *event)
+{
+    return MsgRegisterEvent(event, -1);
+}
+
+int screen_unregister_event(struct sigevent *event)
+{
+    return MsgUnregisterEvent(event);
+}
+#endif
+
 QQnxScreenEventThread::QQnxScreenEventThread(screen_context_t context)
     : QThread()
     , m_screenContext(context)
@@ -75,10 +87,14 @@ QQnxScreenEventThread::QQnxScreenEventThread(screen_context_t context)
         qFatal("QQnxScreenEventThread: Can't continue without a channel connection");
     }
 
-    struct sigevent screenEvent;
-    SIGEV_PULSE_INIT(&screenEvent, m_connectionId, SIGEV_PULSE_PRIO_INHERIT, c_screenCode, 0);
+    SIGEV_PULSE_INIT(&m_screenEvent, m_connectionId, SIGEV_PULSE_PRIO_INHERIT, c_screenCode, 0);
+    if (screen_register_event(m_screenContext, &m_screenEvent) == -1) {
+        ConnectDetach(m_connectionId);
+        ChannelDestroy(m_channelId);
+        qFatal("QQnxScreenEventThread: Can't continue without a registered event");
+    }
 
-    screen_notify(m_screenContext, SCREEN_NOTIFY_EVENT, nullptr, &screenEvent);
+    screen_notify(m_screenContext, SCREEN_NOTIFY_EVENT, nullptr, &m_screenEvent);
 }
 
 QQnxScreenEventThread::~QQnxScreenEventThread()
@@ -86,6 +102,8 @@ QQnxScreenEventThread::~QQnxScreenEventThread()
     // block until thread terminates
     shutdown();
 
+    screen_notify(m_screenContext, SCREEN_NOTIFY_EVENT, nullptr, nullptr);
+    screen_unregister_event(&m_screenEvent);
     ConnectDetach(m_connectionId);
     ChannelDestroy(m_channelId);
 }
diff --git a/src/plugins/platforms/qnx/qqnxscreeneventthread.h b/src/plugins/platforms/qnx/qqnxscreeneventthread.h
index 3c8d197545..e5b762369c 100644
--- a/src/plugins/platforms/qnx/qqnxscreeneventthread.h
+++ b/src/plugins/platforms/qnx/qqnxscreeneventthread.h
@@ -45,6 +45,7 @@
 #include <QtCore/QMutex>
 
 #include <screen/screen.h>
+#include <sys/siginfo.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -73,6 +74,7 @@ private:
 
     int m_channelId;
     int m_connectionId;
+    struct sigevent m_screenEvent;
     screen_context_t m_screenContext;
     bool m_emitNeededOnNextScreenPulse = true;
     int m_screenPulsesSinceLastArmPulse = 0;
diff --git a/src/plugins/platforms/wasm/qwasmscreen.cpp b/src/plugins/platforms/wasm/qwasmscreen.cpp
index 37f1ea832a..b6c9b9e377 100644
--- a/src/plugins/platforms/wasm/qwasmscreen.cpp
+++ b/src/plugins/platforms/wasm/qwasmscreen.cpp
@@ -54,6 +54,8 @@ QWasmScreen::QWasmScreen(const QString &canvasId)
     m_compositor = new QWasmCompositor(this);
     m_eventTranslator = new QWasmEventTranslator(this);
     updateQScreenAndCanvasRenderSize();
+    emscripten::val canvas = emscripten::val::global(m_canvasId.toUtf8().constData());
+    canvas.call<void>("focus");
 }
 
 QWasmScreen::~QWasmScreen()
diff --git a/src/plugins/platforms/windows/qwindowscursor.cpp b/src/plugins/platforms/windows/qwindowscursor.cpp
index 17e8cffb76..59457f1720 100644
--- a/src/plugins/platforms/windows/qwindowscursor.cpp
+++ b/src/plugins/platforms/windows/qwindowscursor.cpp
@@ -50,6 +50,7 @@
 #include <QtGui/qscreen.h>
 #include <QtGui/private/qguiapplication_p.h> // getPixmapCursor()
 #include <QtGui/private/qhighdpiscaling_p.h>
+#include <QtCore/private/qwinregistry_p.h>
 
 #include <QtCore/qdebug.h>
 #include <QtCore/qscopedpointer.h>
@@ -686,6 +687,30 @@ void QWindowsCursor::setPos(const QPoint &pos)
     SetCursorPos(pos.x() , pos.y());
 }
 
+/*
+    The standard size is 32x32, even though the cursor is actually just
+    16 pixels large. If a large cursor is set in the accessibility settings,
+    then the cursor increases with 8 pixels for each step.
+*/
+QSize QWindowsCursor::size() const
+{
+    const QPair<DWORD,bool> cursorSizeSetting =
+        QWinRegistryKey(HKEY_CURRENT_USER, LR"(Control Panel\Cursors)")
+                       .dwordValue(L"CursorBaseSize");
+    const int baseSize = screenCursorSize(m_screen).width() / 2;
+    if (!cursorSizeSetting.second)
+        return QSize(baseSize / 2, baseSize / 2);
+
+    // The registry values are dpi-independent, so we need to scale the result.
+    int cursorSizeValue = cursorSizeSetting.first * m_screen->logicalDpi().first
+                                                  / m_screen->logicalBaseDpi().first;
+
+    // map from registry value 32-256 to 0-14, and from there to pixels
+    cursorSizeValue = (cursorSizeValue - 2 * baseSize) / baseSize;
+    const int cursorSize = baseSize + cursorSizeValue * (baseSize / 2);
+    return QSize(cursorSize, cursorSize);
+}
+
 QPixmap QWindowsCursor::dragDefaultCursor(Qt::DropAction action) const
 {
     switch (action) {
diff --git a/src/plugins/platforms/windows/qwindowscursor.h b/src/plugins/platforms/windows/qwindowscursor.h
index b896f4c7a9..cf3635bd6b 100644
--- a/src/plugins/platforms/windows/qwindowscursor.h
+++ b/src/plugins/platforms/windows/qwindowscursor.h
@@ -113,6 +113,8 @@ public:
     QPoint pos() const override;
     void setPos(const QPoint &pos) override;
 
+    QSize size() const override;
+
     static HCURSOR createPixmapCursor(QPixmap pixmap, const QPoint &hotSpot, qreal scaleFactor = 1);
     static HCURSOR createPixmapCursor(const PixmapCursor &pc, qreal scaleFactor = 1) { return createPixmapCursor(pc.pixmap, pc.hotSpot, scaleFactor); }
     static PixmapCursor customCursor(Qt::CursorShape cursorShape, const QPlatformScreen *screen = nullptr);
diff --git a/src/plugins/platforms/windows/qwindowssystemtrayicon.cpp b/src/plugins/platforms/windows/qwindowssystemtrayicon.cpp
index f2dba4d06b..ab830e1461 100644
--- a/src/plugins/platforms/windows/qwindowssystemtrayicon.cpp
+++ b/src/plugins/platforms/windows/qwindowssystemtrayicon.cpp
@@ -57,11 +57,13 @@
 #include "qwindowsmenu.h"
 #include "qwindowsscreen.h"
 
+#include <QtGui/qguiapplication.h>
 #include <QtGui/qpixmap.h>
 #include <QtCore/qdebug.h>
 #include <QtCore/qrect.h>
 #include <QtCore/qvector.h>
 #include <QtCore/qsettings.h>
+#include <qpa/qwindowsysteminterface.h>
 
 #include <qt_windows.h>
 #include <commctrl.h>
@@ -134,9 +136,12 @@ static int indexOfHwnd(HWND hwnd)
 extern "C" LRESULT QT_WIN_CALLBACK qWindowsTrayIconWndProc(HWND hwnd, UINT message,
                                                            WPARAM wParam, LPARAM lParam)
 {
+    // QTBUG-79248: Trigger screen update if there are no other windows.
+    if (message == WM_DPICHANGED && QGuiApplication::topLevelWindows().isEmpty())
+        QWindowsContext::instance()->screenManager().handleScreenChanges();
     if (message == MYWM_TASKBARCREATED || message == MYWM_NOTIFYICON
         || message == WM_INITMENU || message == WM_INITMENUPOPUP
-        || message == WM_COMMAND) {
+        || message == WM_CLOSE || message == WM_COMMAND) {
         const int index = indexOfHwnd(hwnd);
         if (index >= 0) {
             MSG msg;
@@ -439,6 +444,9 @@ bool QWindowsSystemTrayIcon::winEvent(const MSG &message, long *result)
     case WM_INITMENUPOPUP:
         QWindowsPopupMenu::notifyAboutToShow(reinterpret_cast<HMENU>(message.wParam));
         break;
+    case WM_CLOSE:
+        QWindowSystemInterface::handleApplicationTermination<QWindowSystemInterface::SynchronousDelivery>();
+        break;
     case WM_COMMAND:
         QWindowsPopupMenu::notifyTriggered(LOWORD(message.wParam));
         break;
diff --git a/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp b/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
index e5a9f275ae..cc293b777c 100644
--- a/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
+++ b/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
@@ -289,7 +289,8 @@ HRESULT QWindowsUiaMainProvider::GetPatternProvider(PATTERNID idPattern, IUnknow
         break;
     case UIA_TogglePatternId:
         // Checkbox controls.
-        if (accessible->role() == QAccessible::CheckBox) {
+        if (accessible->role() == QAccessible::CheckBox
+                || (accessible->role() == QAccessible::MenuItem && accessible->state().checkable)) {
             *pRetVal = new QWindowsUiaToggleProvider(id());
         }
         break;
diff --git a/src/plugins/platforms/xcb/qxcbscreen.cpp b/src/plugins/platforms/xcb/qxcbscreen.cpp
index 8bcaa78122..cc84e836b4 100644
--- a/src/plugins/platforms/xcb/qxcbscreen.cpp
+++ b/src/plugins/platforms/xcb/qxcbscreen.cpp
@@ -41,6 +41,7 @@
 #include "qxcbwindow.h"
 #include "qxcbcursor.h"
 #include "qxcbimage.h"
+#include "qxcbintegration.h"
 #include "qnamespace.h"
 #include "qxcbxsettings.h"
 
@@ -49,6 +50,7 @@
 #include <QDebug>
 #include <QtAlgorithms>
 
+#include <qpa/qplatformservices.h>
 #include <qpa/qwindowsysteminterface.h>
 #include <private/qmath_p.h>
 #include <QtGui/private/qhighdpiscaling_p.h>
@@ -356,6 +358,15 @@ static QFontEngine::SubpixelAntialiasingType parseXftRgba(const QByteArray& stri
 
 void QXcbVirtualDesktop::readXResources()
 {
+    const QPlatformServices *services = QXcbIntegration::instance()->services();
+    bool useXftConf = false;
+    if (services) {
+        const QList<QByteArray> desktopEnv = services->desktopEnvironment().split(':');
+        useXftConf = desktopEnv.contains("GNOME") || desktopEnv.contains("UNITY") || desktopEnv.contains("XFCE");
+    }
+    if (!useXftConf)
+        return;
+
     int offset = 0;
     QByteArray resources;
     while (true) {
diff --git a/src/plugins/sqldrivers/psql/qsql_psql.cpp b/src/plugins/sqldrivers/psql/qsql_psql.cpp
index 68313b7ff0..3d8ed29b54 100644
--- a/src/plugins/sqldrivers/psql/qsql_psql.cpp
+++ b/src/plugins/sqldrivers/psql/qsql_psql.cpp
@@ -838,6 +838,7 @@ QSqlRecord QPSQLResult::record() const
         }
         int ptype = PQftype(d->result, i);
         f.setType(qDecodePSQLType(ptype));
+        f.setValue(QVariant(f.type())); // only set in setType() when it's invalid before
         int len = PQfsize(d->result, i);
         int precision = PQfmod(d->result, i);
 
diff --git a/src/testlib/doc/snippets/code/doc_src_cmakelists.txt b/src/testlib/doc/snippets/code/doc_src_cmakelists.txt
new file mode 100644
index 0000000000..96dbe1acee
--- /dev/null
+++ b/src/testlib/doc/snippets/code/doc_src_cmakelists.txt
@@ -0,0 +1,14 @@
+project(mytest LANGUAGES CXX)
+
+find_package(Qt5Test REQUIRED)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+
+enable_testing(true)
+
+add_executable(mytest tst_mytest.cpp)
+add_test(NAME mytest COMMAND mytest)
+
+target_link_libraries(mytest PRIVATE Qt5::Test)
diff --git a/src/testlib/doc/src/qttestlib-manual.qdoc b/src/testlib/doc/src/qttestlib-manual.qdoc
index 19d871d404..688cc2f2f6 100644
--- a/src/testlib/doc/src/qttestlib-manual.qdoc
+++ b/src/testlib/doc/src/qttestlib-manual.qdoc
@@ -83,6 +83,10 @@
          \li Custom types can easily be added to the test data and test output.
     \endtable
 
+    You can use a Qt Creator wizard to create a project that contains Qt tests
+    and build and run them directly from Qt Creator. For more information, see
+    \l {Running Autotests}.
+
     \section1 Creating a Test
 
     To create a test, subclass QObject and add one or more private slots to it. Each
@@ -133,6 +137,41 @@
     \if !defined(qtforpython)
     \section1 Building a Test
 
+    You can build an executable that contains one test class that typically
+    tests one class of production code. However, usually you would want to
+    test several classes in a project by running one command.
+
+    See \l {Chapter 1: Writing a Unit Test}{Writing a Unit Test} for a step by
+    step explanation.
+
+    \section2 Building with CMake and CTest
+
+    You can use \l {CMake and CTest} to create a test.
+    \l{https://cmake.org/cmake/help/latest/manual/ctest.1.html}{CTest} enables
+    you to include or exclude tests based on a regular expression that is
+    matched against the test name. You can further apply the \c LABELS property
+    to a test and CTest can then include or exclude tests based on those labels.
+    All labeled targets will be run when \c {test} target is called on the
+    command line.
+
+    There are several other advantages with CMake. For example, the result of
+    a test run can be published on a web server using CDash with virtually no
+    effort.
+
+    CTest scales to very different unit test frameworks, and works out of the
+    box with QTest.
+
+    The following is an example of a CMakeLists.txt file that specifies the
+    project name and the language used (here, \e mytest and C++), the Qt
+    modules required for building the test (Qt5Test), and the files that are
+    included in the test (\e tst_mytest.cpp).
+
+    \quotefile code/doc_src_cmakelists.txt
+
+    For more information about the options you have, see \l {Build with CMake}.
+
+    \section2 Building with qmake
+
     If you are using \c qmake as your build tool, just add the
     following to your project file:
 
@@ -146,14 +185,14 @@
     See the \l{Building a Testcase}{qmake manual} for
     more information about \c{make check}.
 
+    \section2 Building with Other Tools
+
     If you are using other build tools, make sure that you add the location
     of the Qt Test header files to your include path (usually \c{include/QtTest}
     under your Qt installation directory). If you are using a release build
     of Qt, link your test to the \c QtTest library. For debug builds, use
     \c{QtTest_debug}.
 
-    See \l {Chapter 1: Writing a Unit Test}{Writing a Unit Test} for a step by
-    step explanation.
     \endif
 
     \section1 Qt Test Command Line Arguments
diff --git a/src/widgets/accessible/qaccessiblemenu.cpp b/src/widgets/accessible/qaccessiblemenu.cpp
index 51ba0adaa6..99a9444ff1 100644
--- a/src/widgets/accessible/qaccessiblemenu.cpp
+++ b/src/widgets/accessible/qaccessiblemenu.cpp
@@ -299,6 +299,8 @@ QAccessible::State QAccessibleMenuItem::state() const
         s.disabled = true;
     if (m_action->isChecked())
         s.checked = true;
+    if (m_action->isCheckable())
+        s.checkable = true;
 
     return s;
 }
diff --git a/src/widgets/dialogs/qprogressdialog.cpp b/src/widgets/dialogs/qprogressdialog.cpp
index 42a24239a3..aaa4430c39 100644
--- a/src/widgets/dialogs/qprogressdialog.cpp
+++ b/src/widgets/dialogs/qprogressdialog.cpp
@@ -710,14 +710,17 @@ void QProgressDialog::setValue(int progress)
 QSize QProgressDialog::sizeHint() const
 {
     Q_D(const QProgressDialog);
-    QSize sh = d->label ? d->label->sizeHint() : QSize(0, 0);
-    QSize bh = d->bar->sizeHint();
-    int margin = style()->pixelMetric(QStyle::PM_DefaultTopLevelMargin);
-    int spacing = style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing);
-    int h = margin * 2 + bh.height() + sh.height() + spacing;
+    QSize labelSize = d->label ? d->label->sizeHint() : QSize(0, 0);
+    QSize barSize = d->bar->sizeHint();
+    int marginBottom = style()->pixelMetric(QStyle::PM_LayoutBottomMargin, 0, this);
+    int spacing = style()->pixelMetric(QStyle::PM_LayoutVerticalSpacing, 0, this);
+    int marginLeft = style()->pixelMetric(QStyle::PM_LayoutLeftMargin, 0, this);
+    int marginRight = style()->pixelMetric(QStyle::PM_LayoutRightMargin, 0, this);
+
+    int height = marginBottom * 2 + barSize.height() + labelSize.height() + spacing;
     if (d->cancel)
-        h += d->cancel->sizeHint().height() + spacing;
-    return QSize(qMax(200, sh.width() + 2 * margin), h);
+        height += d->cancel->sizeHint().height() + spacing;
+    return QSize(qMax(200, labelSize.width() + marginLeft + marginRight), height);
 }
 
 /*!\reimp
diff --git a/src/widgets/itemviews/qabstractitemview.cpp b/src/widgets/itemviews/qabstractitemview.cpp
index 67c01adea7..0e54cf235f 100644
--- a/src/widgets/itemviews/qabstractitemview.cpp
+++ b/src/widgets/itemviews/qabstractitemview.cpp
@@ -3074,9 +3074,10 @@ void QAbstractItemView::keyboardSearch(const QString &search)
 QSize QAbstractItemView::sizeHintForIndex(const QModelIndex &index) const
 {
     Q_D(const QAbstractItemView);
-    if (!d->isIndexValid(index) || !d->itemDelegate)
+    if (!d->isIndexValid(index))
         return QSize();
-    return d->delegateForIndex(index)->sizeHint(d->viewOptionsV1(), index);
+    const auto delegate = d->delegateForIndex(index);
+    return delegate ? delegate->sizeHint(d->viewOptionsV1(), index) : QSize();
 }
 
 /*!
@@ -3318,6 +3319,8 @@ void QAbstractItemView::update(const QModelIndex &index)
 
     The \a roles which have been changed can either be an empty container (meaning everything
     has changed), or a non-empty container with the subset of roles which have changed.
+
+    \note: Qt::ToolTipRole is not honored by dataChanged() in the views provided by Qt.
 */
 void QAbstractItemView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles)
 {
@@ -4451,7 +4454,9 @@ QItemViewPaintPairs QAbstractItemViewPrivate::draggablePaintPairs(const QModelIn
             rect |= current;
         }
     }
-    rect &= viewportRect;
+    QRect clipped = rect & viewportRect;
+    rect.setLeft(clipped.left());
+    rect.setRight(clipped.right());
     return ret;
 }
 
diff --git a/src/widgets/itemviews/qlistview.cpp b/src/widgets/itemviews/qlistview.cpp
index de32082b5a..ec01922746 100644
--- a/src/widgets/itemviews/qlistview.cpp
+++ b/src/widgets/itemviews/qlistview.cpp
@@ -664,7 +664,9 @@ QItemViewPaintPairs QListViewPrivate::draggablePaintPairs(const QModelIndexList
             rect |= current;
         }
     }
-    rect &= viewportRect;
+    QRect clipped = rect & viewportRect;
+    rect.setLeft(clipped.left());
+    rect.setRight(clipped.right());
     return ret;
 }
 
diff --git a/src/widgets/kernel/qtooltip.cpp b/src/widgets/kernel/qtooltip.cpp
index b290713440..33dd3e59b6 100644
--- a/src/widgets/kernel/qtooltip.cpp
+++ b/src/widgets/kernel/qtooltip.cpp
@@ -53,11 +53,14 @@
 #endif
 #include <qtextdocument.h>
 #include <qdebug.h>
+#include <qpa/qplatformscreen.h>
+#include <qpa/qplatformcursor.h>
 #include <private/qstylesheetstyle_p.h>
 
 #ifndef QT_NO_TOOLTIP
 #include <qlabel.h>
 #include <QtWidgets/private/qlabel_p.h>
+#include <QtGui/private/qhighdpiscaling_p.h>
 #include <qtooltip.h>
 
 QT_BEGIN_NAMESPACE
@@ -398,24 +401,34 @@ void QTipLabel::placeTip(const QPoint &pos, QWidget *w)
     }
 #endif //QT_NO_STYLE_STYLESHEET
 
-
-    QRect screen = QDesktopWidgetPrivate::screenGeometry(getTipScreen(pos, w));
-
     QPoint p = pos;
-    p += QPoint(2, 16);
-
-    if (p.x() + this->width() > screen.x() + screen.width())
+    int screenNumber = getTipScreen(pos, w);
+    QScreen *screen = QGuiApplication::screens().at(screenNumber);
+    if (screen) {
+        const QPlatformScreen *platformScreen = screen->handle();
+        const QSize cursorSize = QHighDpi::fromNativePixels(platformScreen->cursor()->size(),
+                                                            platformScreen);
+        QPoint offset(2, cursorSize.height());
+        // assuming an arrow shape, we can just move to the side for very large cursors
+        if (cursorSize.height() > 2 * this->height())
+            offset = QPoint(cursorSize.width() / 2, 0);
+
+        p += offset;
+
+        QRect screenRect = screen->geometry();
+        if (p.x() + this->width() > screenRect.x() + screenRect.width())
         p.rx() -= 4 + this->width();
-    if (p.y() + this->height() > screen.y() + screen.height())
+        if (p.y() + this->height() > screenRect.y() + screenRect.height())
         p.ry() -= 24 + this->height();
-    if (p.y() < screen.y())
-        p.setY(screen.y());
-    if (p.x() + this->width() > screen.x() + screen.width())
-        p.setX(screen.x() + screen.width() - this->width());
-    if (p.x() < screen.x())
-        p.setX(screen.x());
-    if (p.y() + this->height() > screen.y() + screen.height())
-        p.setY(screen.y() + screen.height() - this->height());
+        if (p.y() < screenRect.y())
+            p.setY(screenRect.y());
+        if (p.x() + this->width() > screenRect.x() + screenRect.width())
+            p.setX(screenRect.x() + screenRect.width() - this->width());
+        if (p.x() < screenRect.x())
+            p.setX(screenRect.x());
+        if (p.y() + this->height() > screenRect.y() + screenRect.height())
+            p.setY(screenRect.y() + screenRect.height() - this->height());
+    }
     this->move(p);
 }
 
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index f507745e1e..ecea94c66a 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -8621,6 +8621,23 @@ bool QWidget::event(QEvent *event)
         }
     }
     switch (event->type()) {
+    case QEvent::PlatformSurface: {
+        // Sync up QWidget's view of whether or not the widget has been created
+        switch (static_cast<QPlatformSurfaceEvent*>(event)->surfaceEventType()) {
+        case QPlatformSurfaceEvent::SurfaceCreated:
+            if (!testAttribute(Qt::WA_WState_Created))
+                create();
+            break;
+        case QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed:
+            if (testAttribute(Qt::WA_WState_Created)) {
+                // Child windows have already been destroyed by QWindow,
+                // so we skip them here.
+                destroy(false, false);
+            }
+            break;
+        }
+        break;
+    }
     case QEvent::MouseMove:
         mouseMoveEvent((QMouseEvent*)event);
         break;
diff --git a/src/widgets/styles/qcommonstyle.cpp b/src/widgets/styles/qcommonstyle.cpp
index 6b3e3679ae..03081658bb 100644
--- a/src/widgets/styles/qcommonstyle.cpp
+++ b/src/widgets/styles/qcommonstyle.cpp
@@ -1363,7 +1363,6 @@ void QCommonStyle::drawControl(ControlElement element, const QStyleOption *opt,
 
             if (!button->icon.isNull()) {
                 //Center both icon and text
-                QRect iconRect;
                 QIcon::Mode mode = button->state & State_Enabled ? QIcon::Normal : QIcon::Disabled;
                 if (mode == QIcon::Normal && button->state & State_HasFocus)
                     mode = QIcon::Active;
@@ -1372,28 +1371,29 @@ void QCommonStyle::drawControl(ControlElement element, const QStyleOption *opt,
                     state = QIcon::On;
 
                 QPixmap pixmap = button->icon.pixmap(qt_getWindow(widget), button->iconSize, mode, state);
-
                 int pixmapWidth = pixmap.width() / pixmap.devicePixelRatio();
                 int pixmapHeight = pixmap.height() / pixmap.devicePixelRatio();
                 int labelWidth = pixmapWidth;
                 int labelHeight = pixmapHeight;
                 int iconSpacing = 4;//### 4 is currently hardcoded in QPushButton::sizeHint()
-                int textWidth = button->fontMetrics.boundingRect(opt->rect, tf, button->text).width();
-                if (!button->text.isEmpty())
+                if (!button->text.isEmpty()) {
+                    int textWidth = button->fontMetrics.boundingRect(opt->rect, tf, button->text).width();
                     labelWidth += (textWidth + iconSpacing);
+                }
 
-                iconRect = QRect(textRect.x() + (textRect.width() - labelWidth) / 2,
-                                 textRect.y() + (textRect.height() - labelHeight) / 2,
-                                 pixmapWidth, pixmapHeight);
+                QRect iconRect = QRect(textRect.x() + (textRect.width() - labelWidth) / 2,
+                                       textRect.y() + (textRect.height() - labelHeight) / 2,
+                                       pixmapWidth, pixmapHeight);
 
                 iconRect = visualRect(button->direction, textRect, iconRect);
 
-                tf |= Qt::AlignLeft; //left align, we adjust the text-rect instead
-
-                if (button->direction == Qt::RightToLeft)
+                if (button->direction == Qt::RightToLeft) {
+                    tf |= Qt::AlignRight;
                     textRect.setRight(iconRect.left() - iconSpacing);
-                else
+                } else {
+                    tf |= Qt::AlignLeft; //left align, we adjust the text-rect instead
                     textRect.setLeft(iconRect.left() + iconRect.width() + iconSpacing);
+                }
 
                 if (button->state & (State_On | State_Sunken))
                     iconRect.translate(proxy()->pixelMetric(PM_ButtonShiftHorizontal, opt, widget),
diff --git a/src/widgets/styles/qfusionstyle.cpp b/src/widgets/styles/qfusionstyle.cpp
index a732d59e48..0c668913e9 100644
--- a/src/widgets/styles/qfusionstyle.cpp
+++ b/src/widgets/styles/qfusionstyle.cpp
@@ -1770,59 +1770,10 @@ void QFusionStyle::drawControl(ControlElement element, const QStyleOption *optio
         break;
     case CE_PushButtonLabel:
         if (const QStyleOptionButton *button = qstyleoption_cast<const QStyleOptionButton *>(option)) {
-            QRect ir = button->rect;
-            uint tf = Qt::AlignVCenter;
-            if (styleHint(SH_UnderlineShortcut, button, widget))
-                tf |= Qt::TextShowMnemonic;
-            else
-                tf |= Qt::TextHideMnemonic;
-
-            if (!button->icon.isNull()) {
-                //Center both icon and text
-                QPoint point;
-
-                QIcon::Mode mode = button->state & State_Enabled ? QIcon::Normal
-                                                                 : QIcon::Disabled;
-                if (mode == QIcon::Normal && button->state & State_HasFocus)
-                    mode = QIcon::Active;
-                QIcon::State state = QIcon::Off;
-                if (button->state & State_On)
-                    state = QIcon::On;
-
-                QPixmap pixmap = button->icon.pixmap(qt_getWindow(widget), button->iconSize, mode, state);
-                int w = pixmap.width() / pixmap.devicePixelRatio();
-                int h = pixmap.height() / pixmap.devicePixelRatio();
-
-                if (!button->text.isEmpty())
-                    w += button->fontMetrics.boundingRect(option->rect, tf, button->text).width() + 2;
-
-                point = QPoint(ir.x() + ir.width() / 2 - w / 2,
-                               ir.y() + ir.height() / 2 - h / 2);
-
-                w = pixmap.width() / pixmap.devicePixelRatio();
-
-                if (button->direction == Qt::RightToLeft)
-                    point.rx() += w;
-
-                painter->drawPixmap(visualPos(button->direction, button->rect, point), pixmap);
-
-                if (button->direction == Qt::RightToLeft)
-                    ir.translate(-point.x() - 2, 0);
-                else
-                    ir.translate(point.x() + w, 0);
-
-                // left-align text if there is
-                if (!button->text.isEmpty())
-                    tf |= Qt::AlignLeft;
-
-            } else {
-                tf |= Qt::AlignHCenter;
-            }
-
-            if (button->features & QStyleOptionButton::HasMenu)
-                ir = ir.adjusted(0, 0, -proxy()->pixelMetric(PM_MenuButtonIndicator, button, widget), 0);
-            proxy()->drawItemText(painter, ir, tf, button->palette, (button->state & State_Enabled),
-                                  button->text, QPalette::ButtonText);
+            QStyleOptionButton b(*button);
+            // no PM_ButtonShiftHorizontal and PM_ButtonShiftVertical for fusion style
+            b.state &= ~(State_On | State_Sunken);
+            QCommonStyle::drawControl(element, &b, painter, widget);
         }
         break;
     case CE_MenuBarEmptyArea:
diff --git a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
index c40bbbc96c..7e8c9a6050 100644
--- a/src/widgets/styles/qstylesheetstyle.cpp
+++ b/src/widgets/styles/qstylesheetstyle.cpp
@@ -3501,6 +3501,7 @@ void QStyleSheetStyle::drawControl(ControlElement ce, const QStyleOption *opt, Q
                 } else {
                     QWindowsStyle::drawControl(ce, &btnOpt, p, w);
                 }
+                rule.drawImage(p, rule.contentsRect(opt->rect));
                 if (!customMenu)
                     return;
             } else {
@@ -3730,6 +3731,7 @@ void QStyleSheetStyle::drawControl(ControlElement ce, const QStyleOption *opt, Q
                 bool dis = !(opt->state & QStyle::State_Enabled),
                      act = opt->state & QStyle::State_Selected;
 
+                int textRectOffset = m->maxIconWidth;
                 if (!mi.icon.isNull()) {
                     QIcon::Mode mode = dis ? QIcon::Disabled : QIcon::Normal;
                     if (act && !dis)
@@ -3755,19 +3757,21 @@ void QStyleSheetStyle::drawControl(ControlElement ce, const QStyleOption *opt, Q
                     p->drawPixmap(pmr.topLeft(), pixmap);
                 } else if (checkable) {
                     QRenderRule subSubRule = renderRule(w, opt, PseudoElement_MenuCheckMark);
+                    const QRect cmRect = positionRect(w, subRule, subSubRule, PseudoElement_MenuCheckMark, opt->rect, opt->direction);
                     if (subSubRule.hasDrawable() || checked) {
                         QStyleOptionMenuItem newMi = mi;
                         if (!dis)
                             newMi.state |= State_Enabled;
-                        if (act)
+                        if (mi.checked)
                             newMi.state |= State_On;
-                        newMi.rect = positionRect(w, subRule, subSubRule, PseudoElement_MenuCheckMark, opt->rect, opt->direction);
+                        newMi.rect = cmRect;
                         drawPrimitive(PE_IndicatorMenuCheckMark, &newMi, p, w);
                     }
+                    textRectOffset = std::max(textRectOffset, cmRect.width());
                 }
 
                 QRect textRect = subRule.contentsRect(opt->rect);
-                textRect.setLeft(textRect.left() + m->maxIconWidth);
+                textRect.setLeft(textRect.left() + textRectOffset);
                 textRect.setWidth(textRect.width() - mi.tabWidth);
                 const QRect vTextRect = visualRect(opt->direction, m->rect, textRect);
 
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index b0689d0b9e..3d6716666d 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -90,12 +90,10 @@ QT_BEGIN_NAMESPACE
   today's date, and restricted the valid date range to today plus or
   minus 365 days. We've set the order to month, day, year.
 
-  The minimum value for QDateTimeEdit is 14 September 1752. You can
-  change this by calling setMinimumDate(), taking into account that
-  the minimum value for QDate is 2 January 4713BC.
-
-  Other useful functions are setMaximumDate(), setMinimumTime()
-  and setMaximumTime().
+  The range of valid values for a QDateTimeEdit is controlled by the properties
+  \l minimumDateTime, \l maximumDateTime, and their respective date and time
+  components. By default, any date-time from the start of 100 CE to the end of
+  9999 CE is valid.
 
   \section1 Using a Pop-up Calendar Widget
 
@@ -223,10 +221,16 @@ QDateTimeEdit::~QDateTimeEdit()
   When setting this property the timespec of the QDateTimeEdit remains the same
   and the timespec of the new QDateTime is ignored.
 
-  By default, this property contains a date that refers to January 1,
-  2000 and a time of 00:00:00 and 0 milliseconds.
+  By default, this property is set to the start of 2000 CE. It can only be set
+  to a valid QDateTime value. If any operation causes this property to have an
+  invalid date-time as value, it is reset to the value of the \l minimumDateTime
+  property.
+
+  If the QDateTimeEdit has no date fields, setting this property sets the
+  widget's date-range to start and end on the date of the new value of this
+  property.
 
-  \sa date, time
+  \sa date, time, minimumDateTime, maximumDateTime
 */
 
 QDateTime QDateTimeEdit::dateTime() const
@@ -329,25 +333,23 @@ void QDateTimeEdit::setCalendar(QCalendar calendar)
 }
 
 /*!
-  \property QDateTimeEdit::minimumDateTime
   \since 4.4
+  \property QDateTimeEdit::minimumDateTime
 
   \brief the minimum datetime of the date time edit
 
-  When setting this property the \l maximumDateTime() is adjusted if
-  necessary to ensure that the range remains valid. If the datetime is
-  not a valid QDateTime object, this function does nothing.
-
-  The default minimumDateTime can be restored with
-  clearMinimumDateTime()
+  Changing this property implicitly updates the \l minimumDate and \l
+  minimumTime properties to the date and time parts of this property,
+  respectively. When setting this property, the \l maximumDateTime is adjusted,
+  if necessary, to ensure that the range remains valid. Otherwise, changing this
+  property preserves the \l minimumDateTime property.
 
-  By default, this property contains a date that refers to September 14,
-  1752 and a time of 00:00:00 and 0 milliseconds.
+  This property can only be set to a valid QDateTime value. The earliest
+  date-time that setMinimumDateTime() accepts is the start of 100 CE. The
+  property's default is the start of September 14, 1752 CE. This default can be
+  restored with clearMinimumDateTime().
 
-  \sa maximumDateTime(), minimumTime(), maximumTime(), minimumDate(),
-  maximumDate(), setDateTimeRange(), setDateRange(), setTimeRange(),
-  clearMaximumDateTime(), clearMinimumDate(),
-  clearMaximumDate(), clearMinimumTime(), clearMaximumTime()
+  \sa maximumDateTime, minimumTime, minimumDate, setDateTimeRange(), QDateTime::isValid()
 */
 
 QDateTime QDateTimeEdit::minimumDateTime() const
@@ -372,25 +374,23 @@ void QDateTimeEdit::setMinimumDateTime(const QDateTime &dt)
 }
 
 /*!
-  \property QDateTimeEdit::maximumDateTime
   \since 4.4
+  \property QDateTimeEdit::maximumDateTime
 
   \brief the maximum datetime of the date time edit
 
-  When setting this property the \l minimumDateTime() is adjusted if
-  necessary to ensure that the range remains valid. If the datetime is
-  not a valid QDateTime object, this function does nothing.
+  Changing this property implicitly updates the \l maximumDate and \l
+  maximumTime properties to the date and time parts of this property,
+  respectively. When setting this property, the \l minimumDateTime is adjusted,
+  if necessary, to ensure that the range remains valid. Otherwise, changing this
+  property preserves the \l minimumDateTime property.
 
-  The default maximumDateTime can be restored with
+  This property can only be set to a valid QDateTime value. The latest
+  date-time that setMaximumDateTime() accepts is the end of 9999 CE. This is the
+  default for this property. This default can be restored with
   clearMaximumDateTime().
 
-  By default, this property contains a date that refers to 31 December,
-  9999 and a time of 23:59:59 and 999 milliseconds.
-
-  \sa minimumDateTime(), minimumTime(), maximumTime(), minimumDate(),
-  maximumDate(), setDateTimeRange(), setDateRange(), setTimeRange(),
-  clearMinimumDateTime(), clearMinimumDate(),
-  clearMaximumDate(), clearMinimumTime(), clearMaximumTime()
+  \sa minimumDateTime, maximumTime, maximumDate(), setDateTimeRange(), QDateTime::isValid()
 */
 
 QDateTime QDateTimeEdit::maximumDateTime() const
@@ -414,11 +414,12 @@ void QDateTimeEdit::setMaximumDateTime(const QDateTime &dt)
     }
 }
 
-
 /*!
-  Convenience function to set minimum and maximum date time with one
-  function call.
   \since 4.4
+  \brief Set the range of allowed date-times for the date time edit.
+
+  This convenience function sets the \l minimumDateTime and \l maximumDateTime
+  properties.
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 1
 
@@ -426,21 +427,18 @@ void QDateTimeEdit::setMaximumDateTime(const QDateTime &dt)
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 2
 
-  If either \a min or \a max are not valid, this function does
-  nothing.
+  If either \a min or \a max is invalid, this function does nothing. If \a max
+  is less than \a min, \a min is used also as \a max.
 
-  \sa setMinimumDate(), maximumDate(), setMaximumDate(),
-  clearMinimumDate(), setMinimumTime(), maximumTime(),
-  setMaximumTime(), clearMinimumTime(), QDateTime::isValid()
+  \sa minimumDateTime, maximumDateTime, setDateRange(), setTimeRange(), QDateTime::isValid()
 */
 
 void QDateTimeEdit::setDateTimeRange(const QDateTime &min, const QDateTime &max)
 {
     Q_D(QDateTimeEdit);
+    // FIXME: does none of the range checks applied to setMin/setMax methods !
     const QDateTime minimum = min.toTimeSpec(d->spec);
-    QDateTime maximum = max.toTimeSpec(d->spec);
-    if (min > max)
-        maximum = minimum;
+    const QDateTime maximum = (min > max ? minimum : max.toTimeSpec(d->spec));
     d->setRange(minimum, maximum);
 }
 
@@ -449,15 +447,20 @@ void QDateTimeEdit::setDateTimeRange(const QDateTime &min, const QDateTime &max)
 
   \brief the minimum date of the date time edit
 
-  When setting this property the \l maximumDate is adjusted if
-  necessary, to ensure that the range remains valid. If the date is
-  not a valid QDate object, this function does nothing.
+  Changing this property updates the date of the \l minimumDateTime property
+  while preserving the \l minimumTime property. When setting this property,
+  the \l maximumDate is adjusted, if necessary, to ensure that the range remains
+  valid. When this happens, the \l maximumTime property is also adjusted if it
+  is less than the \l minimumTime property. Otherwise, changes to this property
+  preserve the \l maximumDateTime property.
 
-  By default, this property contains a date that refers to September 14, 1752.
-  The minimum date must be at least the first day in year 100, otherwise
-  setMinimumDate() has no effect.
+  This property can only be set to a valid QDate object describing a date on
+  which the current \l minimumTime property makes a valid QDateTime object. The
+  earliest date that setMinimumDate() accepts is the start of 100 CE. The
+  default for this property is September 14, 1752 CE. This default can be
+  restored with clearMinimumDateTime().
 
-  \sa minimumTime(), maximumTime(), setDateRange()
+  \sa maximumDate, minimumTime, minimumDateTime, setDateRange(), QDate::isValid()
 */
 
 QDate QDateTimeEdit::minimumDate() const
@@ -484,13 +487,20 @@ void QDateTimeEdit::clearMinimumDate()
 
   \brief the maximum date of the date time edit
 
-  When setting this property the \l minimumDate is adjusted if
-  necessary to ensure that the range remains valid. If the date is
-  not a valid QDate object, this function does nothing.
-
-  By default, this property contains a date that refers to December 31, 9999.
+  Changing this property updates the date of the \l maximumDateTime property
+  while preserving the \l maximumTime property. When setting this property, the
+  \l minimumDate is adjusted, if necessary, to ensure that the range remains
+  valid. When this happens, the \l minimumTime property is also adjusted if it
+  is greater than the \l maximumTime property. Otherwise, changes to this
+  property preserve the \l minimumDateTime property.
+
+  This property can only be set to a valid QDate object describing a date on
+  which the current \l maximumTime property makes a valid QDateTime object. The
+  latest date that setMaximumDate() accepts is the end of 9999 CE. This is the
+  default for this property. This default can be restored with
+  clearMaximumDateTime().
 
-  \sa minimumDate, minimumTime, maximumTime, setDateRange()
+  \sa minimumDate, maximumTime, maximumDateTime, setDateRange(), QDate::isValid()
 */
 
 QDate QDateTimeEdit::maximumDate() const
@@ -502,9 +512,8 @@ QDate QDateTimeEdit::maximumDate() const
 void QDateTimeEdit::setMaximumDate(const QDate &max)
 {
     Q_D(QDateTimeEdit);
-    if (max.isValid()) {
+    if (max.isValid())
         setMaximumDateTime(QDateTime(max, d->maximum.toTime(), d->spec));
-    }
 }
 
 void QDateTimeEdit::clearMaximumDate()
@@ -517,13 +526,18 @@ void QDateTimeEdit::clearMaximumDate()
 
   \brief the minimum time of the date time edit
 
-  When setting this property the \l maximumTime is adjusted if
-  necessary, to ensure that the range remains valid. If the time is
-  not a valid QTime object, this function does nothing.
+  Changing this property updates the time of the \l minimumDateTime property
+  while preserving the \l minimumDate and \l maximumDate properties. If those
+  date properties coincide, when setting this property, the \l maximumTime
+  property is adjusted, if necessary, to ensure that the range remains
+  valid. Otherwise, changing this property preserves the \l maximumDateTime
+  property.
 
-  By default, this property contains a time of 00:00:00 and 0 milliseconds.
+  This property can be set to any valid QTime value. By default, this property
+  contains a time of 00:00:00 and 0 milliseconds. This default can be restored
+  with clearMinimumTime().
 
-  \sa maximumTime, minimumDate, maximumDate, setTimeRange()
+  \sa maximumTime, minimumDate, minimumDateTime, setTimeRange(), QTime::isValid()
 */
 
 QTime QDateTimeEdit::minimumTime() const
@@ -551,13 +565,18 @@ void QDateTimeEdit::clearMinimumTime()
 
   \brief the maximum time of the date time edit
 
-  When setting this property, the \l minimumTime is adjusted if
-  necessary to ensure that the range remains valid. If the time is
-  not a valid QTime object, this function does nothing.
+  Changing this property updates the time of the \l maximumDateTime property
+  while preserving the \l minimumDate and \l maximumDate properties. If those
+  date properties coincide, when setting this property, the \l minimumTime
+  property is adjusted, if necessary, to ensure that the range remains
+  valid. Otherwise, changing this property preserves the \l minimumDateTime
+  property.
 
-  By default, this property contains a time of 23:59:59 and 999 milliseconds.
+  This property can be set to any valid QTime value. By default, this property
+  contains a time of 23:59:59 and 999 milliseconds. This default can be restored
+  with clearMaximumTime().
 
-  \sa minimumTime, minimumDate, maximumDate, setTimeRange()
+  \sa minimumTime, maximumDate, maximumDateTime, setTimeRange(), QTime::isValid()
 */
 QTime QDateTimeEdit::maximumTime() const
 {
@@ -580,8 +599,10 @@ void QDateTimeEdit::clearMaximumTime()
 }
 
 /*!
-  Convenience function to set minimum and maximum date with one
-  function call.
+  \brief Set the range of allowed dates for the date time edit.
+
+  This convenience function sets the \l minimumDate and \l maximumDate
+  properties.
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 3
 
@@ -589,12 +610,14 @@ void QDateTimeEdit::clearMaximumTime()
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 4
 
-  If either \a min or \a max are not valid, this function does
-  nothing.
+  If either \a min or \a max is invalid, this function does nothing. This
+  function preserves the \l minimumTime property. If \a max is less than \a min,
+  the new maximumDateTime property shall be the new minimumDateTime property. If
+  \a max is equal to \a min and the \l maximumTime property was less then the \l
+  minimumTime property, the \l maximumTime property is set to the \l minimumTime
+  property. Otherwise, this preserves the \l maximumTime property.
 
-  \sa setMinimumDate(), maximumDate(), setMaximumDate(),
-  clearMinimumDate(), setMinimumTime(), maximumTime(),
-  setMaximumTime(), clearMinimumTime(), QDate::isValid()
+  \sa minimumDate, maximumDate, setDateTimeRange(), QDate::isValid()
 */
 
 void QDateTimeEdit::setDateRange(const QDate &min, const QDate &max)
@@ -607,8 +630,16 @@ void QDateTimeEdit::setDateRange(const QDate &min, const QDate &max)
 }
 
 /*!
-  Convenience function to set minimum and maximum time with one
-  function call.
+  \brief Set the range of allowed times for the date time edit.
+
+  This convenience function sets the \l minimumTime and \l maximumTime
+  properties.
+
+  Note that these only constrain the date time edit's value on,
+  respectively, the \l minimumDate and \l maximumDate. When these date
+  properties do not coincide, times after \a maximumTime are allowed on dates
+  before \l maximumDate and times before \a minimumTime are allowed on dates
+  after \l minimumDate.
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 5
 
@@ -616,12 +647,11 @@ void QDateTimeEdit::setDateRange(const QDate &min, const QDate &max)
 
   \snippet code/src_gui_widgets_qdatetimeedit.cpp 6
 
-  If either \a min or \a max are not valid, this function does
-  nothing.
+  If either \a min or \a max is invalid, this function does nothing. This
+  function preserves the \l minimumDate and \l maximumDate properties. If those
+  properties coincide and max is \a less than \a min, \a min is used as \a max.
 
-  \sa setMinimumDate(), maximumDate(), setMaximumDate(),
-  clearMinimumDate(), setMinimumTime(), maximumTime(),
-  setMaximumTime(), clearMinimumTime(), QTime::isValid()
+  \sa minimumTime, maximumTime, setDateTimeRange(), QTime::isValid()
 */
 
 void QDateTimeEdit::setTimeRange(const QTime &min, const QTime &max)
@@ -865,7 +895,7 @@ QString QDateTimeEdit::sectionText(Section section) const
 
   Note that if you specify a two digit year, it will be interpreted
   to be in the century in which the date time edit was initialized.
-  The default century is the 21 (2000-2099).
+  The default century is the 21st (2000-2099).
 
   If you specify an invalid format the format will not be set.
 
diff --git a/src/widgets/widgets/qlineedit.cpp b/src/widgets/widgets/qlineedit.cpp
index 0d2568b85d..bd5e0b047e 100644
--- a/src/widgets/widgets/qlineedit.cpp
+++ b/src/widgets/widgets/qlineedit.cpp
@@ -1216,8 +1216,8 @@ QMargins QLineEdit::textMargins() const
     \row \li \c a \li ASCII alphabetic character permitted but not required.
     \row \li \c N \li ASCII alphanumeric character required. A-Z, a-z, 0-9.
     \row \li \c n \li ASCII alphanumeric character permitted but not required.
-    \row \li \c X \li Any character required.
-    \row \li \c x \li Any character permitted but not required.
+    \row \li \c X \li Any non-blank character required.
+    \row \li \c x \li Any non-blank character permitted but not required.
     \row \li \c 9 \li ASCII digit required. 0-9.
     \row \li \c 0 \li ASCII digit permitted but not required.
     \row \li \c D \li ASCII digit required. 1-9.
diff --git a/src/widgets/widgets/qmenu.cpp b/src/widgets/widgets/qmenu.cpp
index ddcd022fb6..fc7e2dbbcb 100644
--- a/src/widgets/widgets/qmenu.cpp
+++ b/src/widgets/widgets/qmenu.cpp
@@ -792,6 +792,8 @@ void QMenuSloppyState::setSubMenuPopup(const QRect &actionRect, QAction *resetAc
     m_use_reset_action = true;
     m_time.stop();
     m_action_rect = actionRect;
+    if (m_sub_menu)
+        QMenuPrivate::get(m_sub_menu)->sloppyState.m_parent = nullptr;
     m_sub_menu = subMenu;
     QMenuPrivate::get(subMenu)->sloppyState.m_parent = this;
     m_reset_action = resetAction;
diff --git a/src/widgets/widgets/qmenubar.cpp b/src/widgets/widgets/qmenubar.cpp
index a50068b5a0..59c8af30b4 100644
--- a/src/widgets/widgets/qmenubar.cpp
+++ b/src/widgets/widgets/qmenubar.cpp
@@ -846,7 +846,8 @@ QMenu *QMenuBar::addMenu(const QIcon &icon, const QString &title)
 }
 
 /*!
-    Appends \a menu to the menu bar. Returns the menu's menuAction().
+    Appends \a menu to the menu bar. Returns the menu's menuAction(). The menu bar
+    does not take ownership of the menu.
 
     \note The returned QAction object can be used to hide the corresponding
     menu.
diff --git a/src/widgets/widgets/qplaintextedit.cpp b/src/widgets/widgets/qplaintextedit.cpp
index 1856f0296b..0bfaa767c6 100644
--- a/src/widgets/widgets/qplaintextedit.cpp
+++ b/src/widgets/widgets/qplaintextedit.cpp
@@ -2328,6 +2328,7 @@ void QPlainTextEdit::changeEvent(QEvent *e)
             d->autoScrollTimer.stop();
     } else if (e->type() == QEvent::EnabledChange) {
         e->setAccepted(isEnabled());
+        d->control->setPalette(palette());
         d->sendControlEvent(e);
     } else if (e->type() == QEvent::PaletteChange) {
         d->control->setPalette(palette());
diff --git a/src/widgets/widgets/qwidgetlinecontrol.cpp b/src/widgets/widgets/qwidgetlinecontrol.cpp
index a242947c11..9dd61c2c6a 100644
--- a/src/widgets/widgets/qwidgetlinecontrol.cpp
+++ b/src/widgets/widgets/qwidgetlinecontrol.cpp
@@ -1090,7 +1090,7 @@ bool QWidgetLineControl::isValidInput(QChar key, QChar mask) const
             return true;
         break;
     case 'X':
-        if (key.isPrint())
+        if (key.isPrint() && key != m_blank)
             return true;
         break;
     case 'x':
diff --git a/src/widgets/widgets/qwidgettextcontrol.cpp b/src/widgets/widgets/qwidgettextcontrol.cpp
index ce807c9f75..49a1a02867 100644
--- a/src/widgets/widgets/qwidgettextcontrol.cpp
+++ b/src/widgets/widgets/qwidgettextcontrol.cpp
@@ -1283,6 +1283,8 @@ void QWidgetTextControlPrivate::keyPressEvent(QKeyEvent *e)
         } else {
             QTextCursor localCursor = cursor;
             localCursor.deletePreviousChar();
+            if (cursor.d)
+                cursor.d->setX();
         }
         goto accept;
     }
@@ -1322,9 +1324,13 @@ void QWidgetTextControlPrivate::keyPressEvent(QKeyEvent *e)
     else if (e == QKeySequence::Delete) {
         QTextCursor localCursor = cursor;
         localCursor.deleteChar();
+        if (cursor.d)
+            cursor.d->setX();
     } else if (e == QKeySequence::Backspace) {
         QTextCursor localCursor = cursor;
         localCursor.deletePreviousChar();
+        if (cursor.d)
+            cursor.d->setX();
     }else if (e == QKeySequence::DeleteEndOfWord) {
         if (!cursor.hasSelection())
             cursor.movePosition(QTextCursor::NextWord, QTextCursor::KeepAnchor);
diff --git a/tests/auto/corelib/global/qglobal/qglobal.c b/tests/auto/corelib/global/qglobal/qglobal.c
index c7124454d0..7a2266ae94 100644
--- a/tests/auto/corelib/global/qglobal/qglobal.c
+++ b/tests/auto/corelib/global/qglobal/qglobal.c
@@ -28,7 +28,7 @@
 
 #include <QtCore/qglobal.h>
 
-#if QT_HAS_INCLUDE(<stdbool.h>) || __STDC_VERSION__ >= 199901L
+#if __has_include(<stdbool.h>) || __STDC_VERSION__ >= 199901L
 #  include <stdbool.h>
 #else
 #  undef true
diff --git a/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp b/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp
index 4ca68550b9..4e105d7dc7 100644
--- a/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp
+++ b/tests/auto/corelib/kernel/qdeadlinetimer/tst_qdeadlinetimer.cpp
@@ -32,7 +32,7 @@
 #include <QtCore/QElapsedTimer>
 #include <QtTest/QtTest>
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 #  include <chrono>
 #endif
 
@@ -519,7 +519,7 @@ void tst_QDeadlineTimer::expire()
 
 void tst_QDeadlineTimer::stdchrono()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("std::chrono not found on this system");
 #else
     using namespace std::chrono;
diff --git a/tests/auto/corelib/kernel/qeventdispatcher/tst_qeventdispatcher.cpp b/tests/auto/corelib/kernel/qeventdispatcher/tst_qeventdispatcher.cpp
index 49c10c6a24..365508024b 100644
--- a/tests/auto/corelib/kernel/qeventdispatcher/tst_qeventdispatcher.cpp
+++ b/tests/auto/corelib/kernel/qeventdispatcher/tst_qeventdispatcher.cpp
@@ -67,6 +67,7 @@ private slots:
     void sendPostedEvents_data();
     void sendPostedEvents();
     void processEventsOnlySendsQueuedEvents();
+    void eventLoopExit();
 };
 
 bool tst_QEventDispatcher::event(QEvent *e)
@@ -314,5 +315,49 @@ void tst_QEventDispatcher::processEventsOnlySendsQueuedEvents()
     QCOMPARE(object.eventsReceived, 4);
 }
 
+void tst_QEventDispatcher::eventLoopExit()
+{
+    // This test was inspired by QTBUG-79477. A particular
+    // implementation detail in QCocoaEventDispatcher allowed
+    // QEventLoop::exit() to fail to really exit the event loop.
+    // Thus this test is a part of the dispatcher auto-test.
+
+    // Imitates QApplication::exec():
+    QEventLoop mainLoop;
+    // The test itself is a lambda:
+    QTimer::singleShot(0, [&mainLoop]() {
+        // Two more single shots, both will be posted as events
+        // (zero timeout) and supposed to be processes by the
+        // mainLoop:
+
+        QTimer::singleShot(0, [&mainLoop]() {
+            // wakeUp triggers QCocoaEventDispatcher into incrementing
+            // its 'serialNumber':
+            mainLoop.wakeUp();
+            // QCocoaEventDispatcher::processEvents() will process
+            // posted events and execute the second lambda defined below:
+            QCoreApplication::processEvents();
+        });
+
+        QTimer::singleShot(0, [&mainLoop]() {
+            // With QCocoaEventDispatcher this is executed while in the
+            // processEvents (see above) and would fail to actually
+            // interrupt the loop.
+            mainLoop.exit();
+        });
+    });
+
+    bool timeoutObserved = false;
+    QTimer::singleShot(500, [&timeoutObserved, &mainLoop]() {
+        // In case the QEventLoop::exit above failed, we have to bail out
+        // early, not wasting time:
+        mainLoop.exit();
+        timeoutObserved = true;
+    });
+
+    mainLoop.exec();
+    QVERIFY(!timeoutObserved);
+}
+
 QTEST_MAIN(tst_QEventDispatcher)
 #include "tst_qeventdispatcher.moc"
diff --git a/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp b/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
index 8e0bdac520..1bd27cd0ce 100644
--- a/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
+++ b/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
@@ -223,7 +223,7 @@ void tst_QTimer::remainingTimeDuringActivation()
 
 namespace {
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
     template <typename T>
     std::chrono::milliseconds to_ms(T t)
     { return std::chrono::duration_cast<std::chrono::milliseconds>(t); }
@@ -233,7 +233,7 @@ namespace {
 
 void tst_QTimer::basic_chrono()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires C++11 <chrono> support");
 #else
     // duplicates zeroTimer, singleShotTimeout, interval and remainingTime
@@ -871,7 +871,7 @@ void tst_QTimer::singleShotToFunctors()
 
 void tst_QTimer::singleShot_chrono()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires C++11 <chrono> support");
 #else
     // duplicates singleShotStaticFunctionZeroTimeout and singleShotToFunctors
diff --git a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
index c4af2267a8..8db28c7c71 100644
--- a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
+++ b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
@@ -45,7 +45,7 @@
 #include <limits.h>
 #include <float.h>
 #include <cmath>
-#if QT_HAS_INCLUDE(<variant>) && __cplusplus >= 201703L
+#if __has_include(<variant>) && __cplusplus >= 201703L
 #include <variant>
 #endif
 #include <QLinkedList>
@@ -4568,7 +4568,7 @@ void tst_QVariant::accessSequentialContainerKey()
 
 void tst_QVariant::fromStdVariant()
 {
-#if QT_HAS_INCLUDE(<variant>) && __cplusplus >= 201703L
+#if __has_include(<variant>) && __cplusplus >= 201703L
     {
         typedef std::variant<int, bool> intorbool_t;
         intorbool_t stdvar = 5;
diff --git a/tests/auto/corelib/serialization/qcborvalue/tst_qcborvalue.cpp b/tests/auto/corelib/serialization/qcborvalue/tst_qcborvalue.cpp
index 47ad328d64..d5a9012f9f 100644
--- a/tests/auto/corelib/serialization/qcborvalue/tst_qcborvalue.cpp
+++ b/tests/auto/corelib/serialization/qcborvalue/tst_qcborvalue.cpp
@@ -384,7 +384,7 @@ void tst_QCborValue::copyCompare()
     QCOMPARE(v, other);
     QVERIFY(!(v != other));
     QVERIFY(!(v < other));
-#if 0 && QT_HAS_INCLUDE(<compare>)
+#if 0 && __has_include(<compare>)
     QVERIFY(v <= other);
     QVERIFY(v >= other);
     QVERIFY(!(v > other));
@@ -821,9 +821,37 @@ void tst_QCborValue::mapMutation()
         QVERIFY(v.isUndefined());
 
         // now mutate the list
+        // simple -> HasByteData
+        const QString strValue = QStringLiteral("value");
+        v = strValue;
+        QVERIFY(v.isString());
+        QCOMPARE(v, QCborValue(strValue));
+        QCOMPARE(m, QCborMap({{42, strValue}}));
+
+        // HasByteData -> HasByteData
+        const QLatin1String otherStrValue("othervalue");
+        v = otherStrValue;
+        QVERIFY(v.isString());
+        QCOMPARE(v, QCborValue(otherStrValue));
+        QCOMPARE(m, QCborMap({{42, otherStrValue}}));
+
+        // HasByteData -> simple
+        v = 42;
+        QVERIFY(v.isInteger());
+        QCOMPARE(v, QCborValue(42));
+        QCOMPARE(m, QCborMap({{42, 42}}));
+
+        // simple -> container
+        v = QCborArray{1, 2, 3};
+        QVERIFY(v.isArray());
+        QCOMPARE(v, QCborArray({1, 2, 3}));
+        QCOMPARE(m,  QCborMap({{42, QCborArray{1, 2, 3}}}));
+
+        // container -> simple
         v = true;
         QVERIFY(v.isBool());
         QVERIFY(v.isTrue());
+        QCOMPARE(m, QCborMap({{42, true}}));
         QVERIFY(m.begin()->isTrue());
         QVERIFY(m.begin().value() == v);
         QVERIFY(v == m.begin().value());
diff --git a/tests/auto/corelib/thread/qmutex/tst_qmutex.cpp b/tests/auto/corelib/thread/qmutex/tst_qmutex.cpp
index 749aa45916..11f34343ab 100644
--- a/tests/auto/corelib/thread/qmutex/tst_qmutex.cpp
+++ b/tests/auto/corelib/thread/qmutex/tst_qmutex.cpp
@@ -89,7 +89,7 @@ enum {
     waitTime = 100
 };
 
-#if QT_HAS_INCLUDE(<chrono>)
+#if __has_include(<chrono>)
 static Q_CONSTEXPR std::chrono::milliseconds waitTimeAsDuration(waitTime);
 #endif
 
@@ -100,7 +100,7 @@ void tst_QMutex::convertToMilliseconds_data()
     QTest::addColumn<qint64>("intValue");
     QTest::addColumn<qint64>("expected");
 
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #endif
 
@@ -156,7 +156,7 @@ void tst_QMutex::convertToMilliseconds_data()
 
 void tst_QMutex::convertToMilliseconds()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #else
     QFETCH(TimeUnit, unit);
@@ -325,7 +325,7 @@ void tst_QMutex::tryLock_non_recursive()
 }
 
 void tst_QMutex::try_lock_for_non_recursive() {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #else
     class Thread : public QThread
@@ -454,7 +454,7 @@ void tst_QMutex::try_lock_for_non_recursive() {
 
 void tst_QMutex::try_lock_until_non_recursive()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #else
     class Thread : public QThread
@@ -707,7 +707,7 @@ void tst_QMutex::tryLock_recursive()
 
 void tst_QMutex::try_lock_for_recursive()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #else
     class Thread : public QThread
@@ -836,7 +836,7 @@ void tst_QMutex::try_lock_for_recursive()
 
 void tst_QMutex::try_lock_until_recursive()
 {
-#if !QT_HAS_INCLUDE(<chrono>)
+#if !__has_include(<chrono>)
     QSKIP("This test requires <chrono>");
 #else
     class Thread : public QThread
diff --git a/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp b/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
index 7f13fd0aa5..7778542736 100644
--- a/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
+++ b/tests/auto/corelib/time/qdatetime/tst_qdatetime.cpp
@@ -150,6 +150,7 @@ private slots:
     void timeZones() const;
     void systemTimeZoneChange() const;
 
+    void invalid_data() const;
     void invalid() const;
     void range() const;
 
@@ -2209,6 +2210,13 @@ void tst_QDateTime::fromStringDateFormat_data()
         << Qt::TextDate << QDateTime(QDate(2013, 5, 6), QTime(1, 2, 3, 456));
 
     // Test Qt::ISODate format.
+    QTest::newRow("trailing space") // QTBUG-80445
+        << QString("2000-01-02 03:04:05.678 ")
+        << Qt::ISODate << QDateTime(QDate(2000, 1, 2), QTime(3, 4, 5, 678));
+    QTest::newRow("space before millis")
+        << QString("2000-01-02 03:04:05. 678") << Qt::ISODate << QDateTime();
+
+    // Normal usage:
     QTest::newRow("ISO +01:00") << QString::fromLatin1("1987-02-13T13:24:51+01:00")
         << Qt::ISODate << QDateTime(QDate(1987, 2, 13), QTime(12, 24, 51), Qt::UTC);
     QTest::newRow("ISO +00:01") << QString::fromLatin1("1987-02-13T13:24:51+00:01")
@@ -2229,11 +2237,17 @@ void tst_QDateTime::fromStringDateFormat_data()
         << Qt::ISODate << QDateTime(QDate(2014, 12, 15), QTime(15, 37, 9), Qt::UTC);
     QTest::newRow("ISO zzz-3") << QString::fromLatin1("2014-12-15T12:37:09.745-3")
         << Qt::ISODate << QDateTime(QDate(2014, 12, 15), QTime(15, 37, 9, 745), Qt::UTC);
+    QTest::newRow("ISO lower-case") << QString::fromLatin1("2005-06-28T07:57:30.002z")
+        << Qt::ISODate << QDateTime(QDate(2005, 6, 28), QTime(7, 57, 30, 2), Qt::UTC);
     // No time specified - defaults to Qt::LocalTime.
     QTest::newRow("ISO data3") << QString::fromLatin1("2002-10-01")
         << Qt::ISODate << QDateTime(QDate(2002, 10, 1), QTime(0, 0, 0, 0), Qt::LocalTime);
+    // Excess digits in milliseconds, round correctly:
     QTest::newRow("ISO") << QString::fromLatin1("2005-06-28T07:57:30.0010000000Z")
         << Qt::ISODate << QDateTime(QDate(2005, 6, 28), QTime(7, 57, 30, 1), Qt::UTC);
+    QTest::newRow("ISO rounding") << QString::fromLatin1("2005-06-28T07:57:30.0015Z")
+        << Qt::ISODate << QDateTime(QDate(2005, 6, 28), QTime(7, 57, 30, 2), Qt::UTC);
+    // ... and accept comma as separator:
     QTest::newRow("ISO with comma 1") << QString::fromLatin1("2005-06-28T07:57:30,0040000000Z")
         << Qt::ISODate << QDateTime(QDate(2005, 6, 28), QTime(7, 57, 30, 4), Qt::UTC);
     QTest::newRow("ISO with comma 2") << QString::fromLatin1("2005-06-28T07:57:30,0015Z")
@@ -2458,6 +2472,7 @@ void tst_QDateTime::fromStringStringFormat_data()
     if (southBrazil.isValid()) {
         QTest::newRow("spring-forward-midnight")
             << QString("2008-10-19 23:45.678 America/Sao_Paulo") << QString("yyyy-MM-dd mm:ss.zzz t")
+            // That's in the hour skipped - expect the matching time after the spring-forward, in DST:
             << QDateTime(QDate(2008, 10, 19), QTime(1, 23, 45, 678), southBrazil);
     }
 #endif
@@ -3359,6 +3374,9 @@ void tst_QDateTime::timeZones() const
     QCOMPARE(utc.date(), utcDst.date());
     QCOMPARE(utc.time(), utcDst.time());
 
+    // Crash test, QTBUG-80146:
+    QVERIFY(!nzStd.toTimeZone(QTimeZone()).isValid());
+
     // Sydney is 2 hours behind New Zealand
     QTimeZone ausTz = QTimeZone("Australia/Sydney");
     QDateTime aus = nzStd.toTimeZone(ausTz);
@@ -3528,23 +3546,42 @@ void tst_QDateTime::systemTimeZoneChange() const
     QCOMPARE(tzDate.toMSecsSinceEpoch(), tzMsecs);
 }
 
-void tst_QDateTime::invalid() const
+void tst_QDateTime::invalid_data() const
 {
-    QDateTime invalidDate = QDateTime(QDate(0, 0, 0), QTime(-1, -1, -1));
-    QCOMPARE(invalidDate.isValid(), false);
-    QCOMPARE(invalidDate.timeSpec(), Qt::LocalTime);
+    QTest::addColumn<QDateTime>("when");
+    QTest::addColumn<Qt::TimeSpec>("spec");
+    QTest::addColumn<bool>("goodZone");
+    QTest::newRow("default") << QDateTime() << Qt::LocalTime << true;
 
-    QDateTime utcDate = invalidDate.toUTC();
-    QCOMPARE(utcDate.isValid(), false);
-    QCOMPARE(utcDate.timeSpec(), Qt::UTC);
-
-    QDateTime offsetDate = invalidDate.toOffsetFromUtc(3600);
-    QCOMPARE(offsetDate.isValid(), false);
-    QCOMPARE(offsetDate.timeSpec(), Qt::OffsetFromUTC);
+    QDateTime invalidDate = QDateTime(QDate(0, 0, 0), QTime(-1, -1, -1));
+    QTest::newRow("simple") << invalidDate << Qt::LocalTime << true;
+    QTest::newRow("UTC") << invalidDate.toUTC() << Qt::UTC << true;
+    QTest::newRow("offset")
+        << invalidDate.toOffsetFromUtc(3600) << Qt::OffsetFromUTC << true;
+    QTest::newRow("CET")
+        << invalidDate.toTimeZone(QTimeZone("Europe/Oslo")) << Qt::TimeZone << true;
+
+    // Crash tests, QTBUG-80146:
+    QTest::newRow("nozone+construct")
+        << QDateTime(QDate(1970, 1, 1), QTime(12, 0), QTimeZone()) << Qt::TimeZone << false;
+    QTest::newRow("nozone+fromMSecs")
+        << QDateTime::fromMSecsSinceEpoch(42, QTimeZone()) << Qt::TimeZone << false;
+    QDateTime valid(QDate(1970, 1, 1), QTime(12, 0), Qt::UTC);
+    QTest::newRow("tonozone") << valid.toTimeZone(QTimeZone()) << Qt::TimeZone << false;
+}
 
-    QDateTime tzDate = invalidDate.toTimeZone(QTimeZone("Europe/Oslo"));
-    QCOMPARE(tzDate.isValid(), false);
-    QCOMPARE(tzDate.timeSpec(), Qt::TimeZone);
+void tst_QDateTime::invalid() const
+{
+    QFETCH(QDateTime, when);
+    QFETCH(Qt::TimeSpec, spec);
+    QFETCH(bool, goodZone);
+    QVERIFY(!when.isValid());
+    QCOMPARE(when.timeSpec(), spec);
+    QCOMPARE(when.timeZoneAbbreviation(), QString());
+    if (!goodZone)
+        QCOMPARE(when.toMSecsSinceEpoch(), 0);
+    QVERIFY(!when.isDaylightTime());
+    QCOMPARE(when.timeZone().isValid(), goodZone);
 }
 
 void tst_QDateTime::range() const
diff --git a/tests/auto/corelib/tools/containerapisymmetry/tst_containerapisymmetry.cpp b/tests/auto/corelib/tools/containerapisymmetry/tst_containerapisymmetry.cpp
index f6f10e9642..0e4517e740 100644
--- a/tests/auto/corelib/tools/containerapisymmetry/tst_containerapisymmetry.cpp
+++ b/tests/auto/corelib/tools/containerapisymmetry/tst_containerapisymmetry.cpp
@@ -51,7 +51,7 @@
 #ifdef Q_CC_MSVC
 #define COMPILER_HAS_STDLIB_INCLUDE(x) 1
 #else
-#define COMPILER_HAS_STDLIB_INCLUDE(x) QT_HAS_INCLUDE(x)
+#define COMPILER_HAS_STDLIB_INCLUDE(x) __has_include(x)
 #endif
 
 #if COMPILER_HAS_STDLIB_INCLUDE(<forward_list>)
diff --git a/tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp b/tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
index 0e9f94ab2b..3917c859cc 100644
--- a/tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
+++ b/tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
@@ -125,6 +125,7 @@ private slots:
     void clonePreservesResources();
     void clonePreservesUserStates();
     void clonePreservesIndentWidth();
+    void clonePreservesFormatsWhenEmpty();
     void blockCount();
     void defaultStyleSheet();
 
@@ -2348,6 +2349,32 @@ void tst_QTextDocument::clonePreservesIndentWidth()
     delete clone;
 }
 
+void tst_QTextDocument::clonePreservesFormatsWhenEmpty()
+{
+    QTextDocument document;
+    QTextCursor cursor(&document);
+
+    // Change a few char format attributes
+    QTextCharFormat charFormat;
+    charFormat.setFontPointSize(charFormat.fontPointSize() + 1);
+    charFormat.setFontWeight(charFormat.fontWeight() + 1);
+    cursor.setBlockCharFormat(charFormat);
+
+    // Change a few block format attributes
+    QTextBlockFormat blockFormat;
+    blockFormat.setAlignment(Qt::AlignRight); // The default is Qt::AlignLeft
+    blockFormat.setIndent(blockFormat.indent() + 1);
+    cursor.setBlockFormat(blockFormat);
+
+    auto clone = document.clone();
+    QTextCursor cloneCursor(clone);
+
+    QCOMPARE(cloneCursor.blockCharFormat().fontPointSize(), charFormat.fontPointSize());
+    QCOMPARE(cloneCursor.blockCharFormat().fontWeight(), charFormat.fontWeight());
+    QCOMPARE(cloneCursor.blockFormat().alignment(), blockFormat.alignment());
+    QCOMPARE(cloneCursor.blockFormat().indent(), blockFormat.indent());
+}
+
 void tst_QTextDocument::blockCount()
 {
     QCOMPARE(doc->blockCount(), 1);
diff --git a/tests/auto/network/kernel/qnetworkinterface/BLACKLIST b/tests/auto/network/kernel/qnetworkinterface/BLACKLIST
deleted file mode 100644
index e28cc38ee0..0000000000
--- a/tests/auto/network/kernel/qnetworkinterface/BLACKLIST
+++ /dev/null
@@ -1,3 +0,0 @@
-# QTBUG-65667
-[localAddress:linklocal-ipv4]
-windows ci
diff --git a/tests/auto/network/kernel/qnetworkinterface/tst_qnetworkinterface.cpp b/tests/auto/network/kernel/qnetworkinterface/tst_qnetworkinterface.cpp
index 0c7ba99be5..bc6e5435df 100644
--- a/tests/auto/network/kernel/qnetworkinterface/tst_qnetworkinterface.cpp
+++ b/tests/auto/network/kernel/qnetworkinterface/tst_qnetworkinterface.cpp
@@ -215,31 +215,45 @@ void tst_QNetworkInterface::loopbackIPv6()
 }
 void tst_QNetworkInterface::localAddress_data()
 {
+    bool ipv6 = isIPv6Working();
     QTest::addColumn<QHostAddress>("target");
 
     QTest::newRow("localhost-ipv4") << QHostAddress(QHostAddress::LocalHost);
-    if (isIPv6Working())
+    if (ipv6)
         QTest::newRow("localhost-ipv6") << QHostAddress(QHostAddress::LocalHostIPv6);
 
     QTest::newRow("test-server") << QtNetworkSettings::serverIP();
 
-    // Since we don't actually transmit anything, we can list any IPv4 address
-    // and it should work. But we're using a linklocal address so that this
-    // test can pass even machines that failed to reach a DHCP server.
-    QTest::newRow("linklocal-ipv4") << QHostAddress("169.254.0.1");
-
-    if (isIPv6Working()) {
-        // On the other hand, we can't list just any IPv6 here. It's very
-        // likely that this machine has not received a route via ICMPv6-RA or
-        // DHCPv6, so it won't have a global route. On some OSes, IPv6 may be
-        // enabled per interface, so we need to know which ones work.
-        const QList<QHostAddress> addrs = QNetworkInterface::allAddresses();
-        for (const QHostAddress &addr : addrs) {
-            QString scope = addr.scopeId();
-            if (scope.isEmpty())
+    QSet<QHostAddress> added;
+    const QList<QNetworkInterface> ifaces = QNetworkInterface::allInterfaces();
+    for (const QNetworkInterface &iface : ifaces) {
+        if ((iface.flags() & QNetworkInterface::IsUp) == 0)
+            continue;
+        const QList<QNetworkAddressEntry> addrs = iface.addressEntries();
+        for (const QNetworkAddressEntry &entry : addrs) {
+            QHostAddress addr = entry.ip();
+            if (addr.isLoopback())
+                continue;       // added above
+
+            if (addr.protocol() == QAbstractSocket::IPv4Protocol) {
+                // add an IPv4 address with bits in the host portion of the address flipped
+                quint32 ip4 = entry.ip().toIPv4Address();
+                addr.setAddress(ip4 ^ ~entry.netmask().toIPv4Address());
+            } else if (!ipv6 || entry.prefixLength() != 64) {
+                continue;
+            } else {
+                // add a random node in this IPv6 network
+                quint64 randomid = qFromBigEndian(Q_UINT64_C(0x8f41f072e5733caa));
+                QIPv6Address ip6 = addr.toIPv6Address();
+                memcpy(&ip6[8], &randomid, sizeof(randomid));
+                addr.setAddress(ip6);
+            }
+
+            if (added.contains(addr))
                 continue;
-            QTest::addRow("linklocal-ipv6-%s", qPrintable(scope))
-                    << QHostAddress("fe80::1234%" + scope);
+            added.insert(addr);
+
+            QTest::addRow("%s-%s", qPrintable(iface.name()), qPrintable(addr.toString())) << addr;
         }
     }
 }
diff --git a/tests/auto/sql/kernel/qsqlquery/tst_qsqlquery.cpp b/tests/auto/sql/kernel/qsqlquery/tst_qsqlquery.cpp
index 4c3749eaee..4533284a0f 100644
--- a/tests/auto/sql/kernel/qsqlquery/tst_qsqlquery.cpp
+++ b/tests/auto/sql/kernel/qsqlquery/tst_qsqlquery.cpp
@@ -965,9 +965,7 @@ void tst_QSqlQuery::blob()
     //don' make it too big otherwise sybase and mysql will complain
     QByteArray ba( BLOBSIZE, 0 );
 
-    int i;
-
-    for ( i = 0; i < ( int )ba.size(); ++i )
+    for (int i = 0; i < ba.size(); ++i)
         ba[i] = i % 256;
 
     QSqlQuery q( db );
@@ -980,7 +978,7 @@ void tst_QSqlQuery::blob()
 
     QVERIFY_SQL(q, prepare("insert into " + qTableName("qtest_blob", __FILE__, db) + " (id, t_blob) values (?, ?)"));
 
-    for ( i = 0; i < BLOBCOUNT; ++i ) {
+    for (int i = 0; i < BLOBCOUNT; ++i) {
         q.addBindValue( i );
         q.addBindValue( ba );
         QVERIFY_SQL( q, exec() );
@@ -988,13 +986,13 @@ void tst_QSqlQuery::blob()
 
     QVERIFY_SQL(q, exec("select * from " + qTableName("qtest_blob", __FILE__, db)));
 
-    for ( i = 0; i < BLOBCOUNT; ++i ) {
+    for (int i = 0; i < BLOBCOUNT; ++i) {
         QVERIFY( q.next() );
         QByteArray res = q.value( 1 ).toByteArray();
         QVERIFY2( res.size() >= ba.size(),
                   QString( "array sizes differ, expected %1, got %2" ).arg( ba.size() ).arg( res.size() ).toLatin1() );
 
-        for ( int i2 = 0; i2 < ( int )ba.size(); ++i2 ) {
+        for (int i2 = 0; i2 < ba.size(); ++i2) {
             if ( res[i2] != ba[i2] )
                 QFAIL( QString( "ByteArrays differ at position %1, expected %2, got %3" ).arg(
                            i2 ).arg(( int )( unsigned char )ba[i2] ).arg(( int )( unsigned char )res[i2] ).toLatin1() );
@@ -1834,7 +1832,7 @@ void tst_QSqlQuery::oci_rawField()
 }
 
 // test whether we can fetch values with more than DOUBLE precision
-// note that MySQL's 3.x highest precision is that of a double, although
+// note that SQLite highest precision is that of a double, although
 // you can define field with higher precision
 void tst_QSqlQuery::precision()
 {
@@ -1845,46 +1843,41 @@ void tst_QSqlQuery::precision()
     if (dbType == QSqlDriver::Interbase)
         QSKIP("DB unable to store high precision");
 
+    const auto oldPrecision = db.driver()->numericalPrecisionPolicy();
+    db.driver()->setNumericalPrecisionPolicy(QSql::HighPrecision);
     const QString qtest_precision(qTableName("qtest_precision", __FILE__, db));
-    static const char precStr[] = "1.2345678901234567891";
-    const int precStrLen = sizeof(precStr);
+    static const QLatin1String precStr("1.2345678901234567891");
 
     {
         // need a new scope for SQLITE
         QSqlQuery q( db );
 
         q.exec("drop table " + qtest_precision);
-        if ( tst_Databases::isMSAccess( db ) )
-            QVERIFY_SQL( q, exec( "create table " + qtest_precision + " (col1 number)" ) );
+        if (tst_Databases::isMSAccess(db))
+            QVERIFY_SQL(q, exec("CREATE TABLE " + qtest_precision + " (col1 number)"));
         else
-            QVERIFY_SQL( q, exec( "create table " + qtest_precision + " (col1 numeric(21, 20))" ) );
-
-        QVERIFY_SQL( q, exec( "insert into " + qtest_precision + " (col1) values (1.2345678901234567891)" ) );
-
-        QVERIFY_SQL( q, exec( "select * from " + qtest_precision ) );
-        QVERIFY( q.next() );
+            QVERIFY_SQL(q, exec("CREATE TABLE " + qtest_precision + " (col1 numeric(21, 20))"));
 
-        QString val = q.value( 0 ).toString();
-
-        if ( !val.startsWith( "1.2345678901234567891" ) ) {
+        QVERIFY_SQL(q, exec("INSERT INTO " + qtest_precision + " (col1) VALUES (" + precStr + ")"));
+        QVERIFY_SQL(q, exec("SELECT * FROM " + qtest_precision));
+        QVERIFY(q.next());
+        const QString val = q.value(0).toString();
+        if (!val.startsWith(precStr)) {
             int i = 0;
-
-            while ( i < precStrLen && i < val.size() && precStr[i] != 0 && *( precStr + i ) == val[i].toLatin1() )
+            while (i < val.size() && precStr[i] != 0 && precStr[i] == val[i].toLatin1())
                 i++;
 
-            // MySQL and TDS have crappy precisions by default
-            if (dbType == QSqlDriver::MySqlServer) {
-                if ( i < 17 )
-                    QWARN( "MySQL didn't return the right precision" );
-            } else if (dbType == QSqlDriver::Sybase) {
-                if ( i < 18 )
-                    QWARN( "TDS didn't return the right precision" );
+            // TDS has crappy precisions by default
+            if (dbType == QSqlDriver::Sybase) {
+                if (i < 18)
+                    QWARN("TDS didn't return the right precision");
             } else {
-                QWARN( QString( tst_Databases::dbToString( db ) + " didn't return the right precision (" +
-                                QString::number( i ) + " out of 21), " + val ).toLatin1() );
+                QWARN(QString(tst_Databases::dbToString(db) + " didn't return the right precision (" +
+                              QString::number(i) + " out of 21), " + val).toUtf8());
             }
         }
     } // SQLITE scope
+    db.driver()->setNumericalPrecisionPolicy(oldPrecision);
 }
 
 void tst_QSqlQuery::nullResult()
@@ -2840,10 +2833,11 @@ void tst_QSqlQuery::psql_bindWithDoubleColonCastOperator()
     QVERIFY_SQL( q, exec() );
     QVERIFY_SQL( q, next() );
 
-    if ( db.driver()->hasFeature( QSqlDriver::PreparedQueries ) )
-        QCOMPARE( q.executedQuery(), QString( "select sum((fld1 - fld2)::int) from " + tablename + " where id1 = ? and id2 =? and id3=?" ) );
+    // the positional placeholders are converted to named placeholders in executedQuery()
+    if (db.driver()->hasFeature(QSqlDriver::PreparedQueries))
+        QCOMPARE(q.executedQuery(), QString("select sum((fld1 - fld2)::int) from " + tablename + " where id1 = :myid1 and id2 =:myid2 and id3=:myid3"));
     else
-        QCOMPARE( q.executedQuery(), QString( "select sum((fld1 - fld2)::int) from " + tablename + " where id1 = 1 and id2 =2 and id3=3" ) );
+        QCOMPARE(q.executedQuery(), QString("select sum((fld1 - fld2)::int) from " + tablename + " where id1 = 1 and id2 =2 and id3=3"));
 }
 
 void tst_QSqlQuery::psql_specialFloatValues()
@@ -4003,8 +3997,8 @@ void tst_QSqlQuery::QTBUG_2192()
 
         // Check if retrieved value preserves reported precision
         int precision = qMax(0, q.record().field("dt").precision());
-        int diff = qAbs(q.value(0).toDateTime().msecsTo(dt));
-        int keep = qMin(1000, (int)qPow(10.0, precision));
+        qint64 diff = qAbs(q.value(0).toDateTime().msecsTo(dt));
+        qint64 keep = qMin(1000LL, qRound64(qPow(10.0, precision)));
         QVERIFY(diff <= 1000 - keep);
     }
 }
@@ -4021,8 +4015,10 @@ void tst_QSqlQuery::QTBUG_36211()
         QSqlQuery q(db);
         QVERIFY_SQL(q, exec(QString("CREATE TABLE %1 (dtwtz timestamptz, dtwotz timestamp)").arg(tableName)));
 
-        QTimeZone l_tzBrazil("BRT");
-        QTimeZone l_tzChina("CST");
+        QTimeZone l_tzBrazil("America/Sao_Paulo");
+        QTimeZone l_tzChina("Asia/Shanghai");
+        QVERIFY(l_tzBrazil.isValid());
+        QVERIFY(l_tzChina.isValid());
         QDateTime dt = QDateTime(QDate(2014, 10, 30), QTime(14, 12, 02, 357));
         QVERIFY_SQL(q, prepare("INSERT INTO " + tableName + " (dtwtz, dtwotz) VALUES (:dt, :dt)"));
         q.bindValue(":dt", dt);
@@ -4040,8 +4036,8 @@ void tst_QSqlQuery::QTBUG_36211()
             for (int j = 0; j < 2; ++j) {
                 // Check if retrieved value preserves reported precision
                 int precision = qMax(0, q.record().field(j).precision());
-                int diff = qAbs(q.value(j).toDateTime().msecsTo(dt));
-                int keep = qMin(1000, (int)qPow(10.0, precision));
+                qint64 diff = qAbs(q.value(j).toDateTime().msecsTo(dt));
+                qint64 keep = qMin(1000LL, qRound64(qPow(10.0, precision)));
                 QVERIFY(diff <= 1000 - keep);
             }
         }
diff --git a/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp b/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
index 029738652e..afb24bc528 100644
--- a/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
+++ b/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
@@ -1380,6 +1380,7 @@ void tst_QFiledialog::clearLineEdit()
     fd.setFileMode(QFileDialog::AnyFile);
     fd.show();
 
+    QVERIFY(QTest::qWaitForWindowExposed(&fd));
     QLineEdit *lineEdit = fd.findChild<QLineEdit*>("fileNameEdit");
     QVERIFY(lineEdit);
     QCOMPARE(lineEdit->text(), QLatin1String("foo"));
diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index 6f8fd5dcbe..dd747a8616 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -60,6 +60,7 @@
 #include <QtGui/qpaintengine.h>
 #include <QtGui/qbackingstore.h>
 #include <QtGui/qguiapplication.h>
+#include <QtGui/qpa/qplatformwindow.h>
 #include <QtGui/qscreen.h>
 #include <qmenubar.h>
 #include <qcompleter.h>
@@ -227,6 +228,7 @@ private slots:
     void setFixedSize();
 
     void ensureCreated();
+    void createAndDestroy();
     void winIdChangeEvent();
     void persistentWinId();
     void showNativeChild();
@@ -4250,6 +4252,58 @@ public:
     int winIdChangeEventCount() const { return m_winIdList.count(); }
 };
 
+class CreateDestroyWidget : public WinIdChangeWidget
+{
+public:
+    void create() { QWidget::create(); }
+    void destroy() { QWidget::destroy(); }
+};
+
+void tst_QWidget::createAndDestroy()
+{
+    CreateDestroyWidget widget;
+
+    // Create and destroy via QWidget
+    widget.create();
+    QVERIFY(widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 1);
+    QVERIFY(widget.internalWinId());
+
+    widget.destroy();
+    QVERIFY(!widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 2);
+    QVERIFY(!widget.internalWinId());
+
+    // Create via QWidget, destroy via QWindow
+    widget.create();
+    QVERIFY(widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 3);
+    QVERIFY(widget.internalWinId());
+
+    widget.windowHandle()->destroy();
+    QVERIFY(!widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 4);
+    QVERIFY(!widget.internalWinId());
+
+    // Create via QWidget again
+    widget.create();
+    QVERIFY(widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 5);
+    QVERIFY(widget.internalWinId());
+
+    // Destroy via QWindow, create via QWindow
+    widget.windowHandle()->destroy();
+    QVERIFY(widget.windowHandle());
+    QVERIFY(!widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 6);
+    QVERIFY(!widget.internalWinId());
+
+    widget.windowHandle()->create();
+    QVERIFY(widget.testAttribute(Qt::WA_WState_Created));
+    QCOMPARE(widget.winIdChangeEventCount(), 7);
+    QVERIFY(widget.internalWinId());
+}
+
 void tst_QWidget::winIdChangeEvent()
 {
     {
diff --git a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
index c2475be8b4..bf31f12958 100644
--- a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
+++ b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
@@ -885,9 +885,6 @@ void tst_QLineEdit::hasAcceptableInputMask()
     qApp->sendEvent(testWidget, &lostFocus);
     QVERIFY(validInput);
 
-    // at the moment we don't strip the blank character if it is valid input, this makes the test between x vs X useless
-    QEXPECT_FAIL( "Any optional and required", "To eat blanks or not? Known issue. Task 43172", Abort);
-
     // test requiredMask
     testWidget->setInputMask(requiredMask);
     validInput = true;
diff --git a/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp b/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
index 336b6ebfd5..a86784f2ec 100644
--- a/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
+++ b/tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
@@ -155,6 +155,7 @@ private slots:
 #if QT_CONFIG(scrollbar)
     void updateAfterChangeCenterOnScroll();
 #endif
+    void updateCursorPositionAfterEdit();
 
 private:
     void createSelection();
@@ -1802,5 +1803,50 @@ void tst_QPlainTextEdit::updateAfterChangeCenterOnScroll()
 
 #endif
 
+void tst_QPlainTextEdit::updateCursorPositionAfterEdit()
+{
+    QPlainTextEdit plaintextEdit;
+    plaintextEdit.setPlainText("some text some text\nsome text some text");
+
+    const auto initialPosition = 1;
+
+    // select some text
+    auto cursor = plaintextEdit.textCursor();
+    cursor.setPosition(initialPosition, QTextCursor::MoveAnchor);
+    cursor.setPosition(initialPosition + 3, QTextCursor::KeepAnchor);
+    plaintextEdit.setTextCursor(cursor);
+    QVERIFY(plaintextEdit.textCursor().hasSelection());
+
+    QTest::keyClick(&plaintextEdit, Qt::Key_Delete);
+    QTest::keyClick(&plaintextEdit, Qt::Key_Down);
+    QTest::keyClick(&plaintextEdit, Qt::Key_Up);
+
+    // Moving the cursor down and up should bring it to the initial position
+    QCOMPARE(plaintextEdit.textCursor().position(), initialPosition);
+
+    // Test the same with backspace
+    cursor = plaintextEdit.textCursor();
+    cursor.setPosition(initialPosition + 3, QTextCursor::KeepAnchor);
+    plaintextEdit.setTextCursor(cursor);
+    QVERIFY(plaintextEdit.textCursor().hasSelection());
+
+    QTest::keyClick(&plaintextEdit, Qt::Key_Backspace);
+    QTest::keyClick(&plaintextEdit, Qt::Key_Down);
+    QTest::keyClick(&plaintextEdit, Qt::Key_Up);
+
+    // Moving the cursor down and up should bring it to the initial position
+    QCOMPARE(plaintextEdit.textCursor().position(), initialPosition);
+
+    // Test insertion
+    const QString txt("txt");
+    QApplication::clipboard()->setText(txt);
+    plaintextEdit.paste();
+    QTest::keyClick(&plaintextEdit, Qt::Key_Down);
+    QTest::keyClick(&plaintextEdit, Qt::Key_Up);
+
+    // The curser should move back to the end of the copied text
+    QCOMPARE(plaintextEdit.textCursor().position(), initialPosition + txt.length());
+}
+
 QTEST_MAIN(tst_QPlainTextEdit)
 #include "tst_qplaintextedit.moc"
diff --git a/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp b/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
index 1d47d98657..8f8e8300a1 100644
--- a/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
+++ b/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
@@ -30,7 +30,7 @@
 #include <QtTest/QtTest>
 #include <QtCore/private/qmemory_p.h>
 #include <mutex>
-#if QT_HAS_INCLUDE(<shared_mutex>)
+#if __has_include(<shared_mutex>)
 #if __cplusplus > 201103L
 #include <shared_mutex>
 #endif
diff --git a/tests/manual/highdpi/main.cpp b/tests/manual/highdpi/main.cpp
index c025f251a2..2a9fb6aa0c 100644
--- a/tests/manual/highdpi/main.cpp
+++ b/tests/manual/highdpi/main.cpp
@@ -39,6 +39,7 @@
 #include <QButtonGroup>
 #include <QLineEdit>
 #include <QPlainTextEdit>
+#include <QTabWidget>
 #include <QScrollBar>
 #include <QSlider>
 #include <QSpinBox>
@@ -51,12 +52,14 @@
 #include <QGraphicsView>
 #include <QGraphicsTextItem>
 #include <QFile>
+#include <QFontMetrics>
 #include <QMouseEvent>
 #include <QTemporaryDir>
 #include <QTimer>
 #include <QCommandLineParser>
 #include <QCommandLineOption>
 #include <QDebug>
+#include <QElapsedTimer>
 #include <private/qhighdpiscaling_p.h>
 #include <qpa/qplatformscreen.h>
 
@@ -64,6 +67,12 @@
 
 #include <utility>
 
+static QTextStream &operator<<(QTextStream &str, const QSizeF &s)
+{
+    str << s.width() << 'x' << s.height();
+    return str;
+}
+
 static QTextStream &operator<<(QTextStream &str, const QRect &r)
 {
     str << r.width() << 'x' << r.height() << Qt::forcesign << r.x() << r.y() << Qt::noforcesign;
@@ -1241,7 +1250,7 @@ public:
     }
 };
 
-class MetricsTest : public QWidget
+class MetricsTest : public QTabWidget
 {
     Q_OBJECT
 public:
@@ -1258,14 +1267,25 @@ QT_SCREEN_SCALE_FACTORS=N;N;N or QT_SCREEN_SCALE_FACTORS=name:N
 QT_SCALE_FACTOR_ROUNDING_POLICY=Round|Ceil|Floor|RoundPreferFloor|PassThrough
 QT_DPI_ADJUSTMENT_POLICY=AdjustDpi|DontAdjustDpi|AdjustUpOnly)";
 
-        resize(480, 360);
+        m_textEdit = addTextPage("Parameters");
+        m_logEdit = addTextPage("Screen Change Log");
 
-        auto layout = new QVBoxLayout(this);
+        const auto screens = QGuiApplication::screens();
+        for (auto screen : screens)
+            connectScreenChangeSignals(screen);
+        connect(qApp, &QGuiApplication::screenAdded, this, &MetricsTest::slotScreenAdded);
+        connect(qApp, &QGuiApplication::primaryScreenChanged, this, &MetricsTest::slotPrimaryScreenChanged);
+        connect(qApp, &QGuiApplication::screenRemoved, this, &MetricsTest::slotScreenRemoved);
 
-        m_textEdit = new QPlainTextEdit;
-        m_textEdit->setReadOnly(true);
-        layout->addWidget(m_textEdit);
         setWindowTitle(formatWindowTitle("Screens"));
+        m_logTimer.start();
+        logMessage(briefFormatScreens());
+
+        // Resize to roughly match the metrics text.
+        const auto metrics = QFontMetrics(m_textEdit->font(), m_textEdit);
+        const int width = 10 + metrics.horizontalAdvance(QStringLiteral("X")) * 50;
+        const int height = 40 + metrics.height() * (10 + 8 * screens.size());
+        resize(width, height);
     }
 
     void setVisible(bool visible) override
@@ -1323,15 +1343,118 @@ QT_DPI_ADJUSTMENT_POLICY=AdjustDpi|DontAdjustDpi|AdjustUpOnly)";
 private slots:
     void screenChanged()
     {
-        qDebug().noquote() << __FUNCTION__ << windowHandle()->screen()->name();
+        const QString message = QLatin1String("screenChanged ") + windowHandle()->screen()->name();
+        qInfo("%s", qPrintable(message));
+        logMessage(message);
         updateMetrics();
     }
 
+    void slotScreenAdded(QScreen *);
+    void slotScreenRemoved(QScreen *);
+    void slotPrimaryScreenChanged(QScreen *);
+    void slotScreenGeometryChanged(const QRect &geometry)
+    { logScreenChangeSignal(sender(), "geometry", geometry); }
+    void slotScreenAvailableGeometryChanged(const QRect &geometry)
+    { logScreenChangeSignal(sender(), "availableGeometry", geometry); }
+    void slotScreenPhysicalSizeChanged(const QSizeF &size)
+    { logScreenChangeSignal(sender(), "physicalSize", size); }
+    void slotScreenPhysicalDotsPerInchChanged(qreal dpi)
+    { logScreenChangeSignal(sender(), "physicalDotsPerInch", dpi); }
+    void slotScreenLogicalDotsPerInchChanged(qreal dpi)
+    { logScreenChangeSignal(sender(), "logicalDotsPerInch", dpi); }
+    void slotScreenVirtualGeometryChanged(const QRect &rect)
+    { logScreenChangeSignal(sender(), "virtualGeometry", rect); }
+    void slotScreenPrimaryOrientationChanged(Qt::ScreenOrientation orientation)
+    { logScreenChangeSignal(sender(), "primaryOrientation", orientation); }
+    void slotScreenOrientationChanged(Qt::ScreenOrientation orientation)
+    { logScreenChangeSignal(sender(), "orientation", orientation); }
+    void slotScreenRefreshRateChanged(qreal refreshRate)
+    { logScreenChangeSignal(sender(), "refreshRate", refreshRate); }
+
 private:
+    QPlainTextEdit *addTextPage(const QString &title);
+    void logMessage(const QString &);
+    void connectScreenChangeSignals(QScreen *s);
+    static QString briefFormatScreens();
+    template <class T>
+    void logScreenChangeSignal(const QObject *o, const char *name, const T &value);
+
     QPlainTextEdit *m_textEdit;
+    QPlainTextEdit *m_logEdit;
+    QElapsedTimer m_logTimer;
     bool m_screenChangedConnected = false;
 };
 
+void MetricsTest::slotScreenAdded(QScreen *screen)
+{
+    logMessage(QLatin1String("Added ") + screen->name() + QLatin1Char(' ')
+               + briefFormatScreens());
+    connectScreenChangeSignals(screen);
+}
+
+void MetricsTest::slotScreenRemoved(QScreen *screen)
+{
+    logMessage(QLatin1String("Removed ") + screen->name() + QLatin1Char(' ')
+               + briefFormatScreens());
+}
+
+void MetricsTest::slotPrimaryScreenChanged(QScreen *screen)
+{
+    logMessage(QLatin1String("PrimaryScreenChanged ") + screen->name() + QLatin1Char(' ')
+               + briefFormatScreens());
+}
+
+QPlainTextEdit *MetricsTest::addTextPage(const QString &title)
+{
+    auto result = new QPlainTextEdit(this);
+    result->setReadOnly(true);
+    result->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
+    addTab(result, title);
+    return result;
+}
+
+void MetricsTest::logMessage(const QString &m)
+{
+    const QString timeStamp =
+        QStringLiteral("%1ms: %2").arg(m_logTimer.elapsed(), 6, 10, QLatin1Char('0')).arg(m);
+    m_logEdit->appendPlainText(timeStamp);
+}
+
+void MetricsTest::connectScreenChangeSignals(QScreen *s)
+{
+    connect(s, &QScreen::geometryChanged, this, &MetricsTest::slotScreenGeometryChanged);
+    connect(s, &QScreen::availableGeometryChanged, this, &MetricsTest::slotScreenAvailableGeometryChanged);
+    connect(s, &QScreen::physicalSizeChanged, this, &MetricsTest::slotScreenPhysicalSizeChanged);
+    connect(s, &QScreen::physicalDotsPerInchChanged, this, &MetricsTest::slotScreenPhysicalDotsPerInchChanged);
+    connect(s, &QScreen::logicalDotsPerInchChanged, this, &MetricsTest::slotScreenLogicalDotsPerInchChanged);
+    connect(s, &QScreen::virtualGeometryChanged, this, &MetricsTest::slotScreenVirtualGeometryChanged);
+    connect(s, &QScreen::primaryOrientationChanged, this, &MetricsTest::slotScreenPrimaryOrientationChanged);
+    connect(s, &QScreen::orientationChanged, this, &MetricsTest::slotScreenOrientationChanged);
+    connect(s, &QScreen::refreshRateChanged, this, &MetricsTest::slotScreenRefreshRateChanged);
+}
+
+QString MetricsTest::briefFormatScreens()
+{
+    QString message;
+    QTextStream str(&message);
+    const auto screens = QGuiApplication::screens();
+    for (int i = 0, size = screens.size(); i < size; ++i) {
+        str << (i ? ", " : "(");
+        str << screens.at(i)->name() << " " << screens.at(i)->geometry();
+    }
+    str << ')';
+    return message;
+}
+
+template <class T>
+void MetricsTest::logScreenChangeSignal(const QObject *o, const char *name, const T &value)
+{
+    auto screen = qobject_cast<const QScreen *>(o);
+    QString message;
+    QTextStream(&message) << (screen ? screen->name() : QString()) << ' ' << name << " changed: " << value;
+    logMessage(message);
+}
+
 int main(int argc, char **argv)
 {
 #define NOSCALINGOPTION "noscaling"
diff --git a/tests/testserver/docker-compose-bridge-network.yml b/tests/testserver/docker-compose-bridge-network.yml
index 2cabeee1dc..8054d631f8 100644
--- a/tests/testserver/docker-compose-bridge-network.yml
+++ b/tests/testserver/docker-compose-bridge-network.yml
@@ -1,11 +1,20 @@
 version: '2.1'
 
-# The tag of images is used by docker compose file to launch the corresponding
-# docker containers. The value of tag comes from the provisioning script
-# (coin/provisioning/.../testserver/docker_testserver.sh). The script gets SHA-1
-# of each server context as the tag of docker images. If one of the server
-# contexts gets changes, please make sure to update this compose file as well.
-# You can run command 'docker images' to list all the tags of test server images.
+# The tag of images is used by docker compose file to launch the correct
+# docker containers. By default we always launch the "latest" tag.
+#
+# But in the "docker build" phase, we also tag the images with a unique tag,
+# the SHA1 hash of all files used for "docker build" - see sha1tree() in
+# provisioning.
+#
+# So if you want to update the docker image at a specific time, make sure that
+#   1. you modify this file to run the specific image's SHA1 tag, instead of
+#      "latest"
+#   2. you build two docker images in provisioning, the currently used one,
+#      plus the new one that you tag as "latest"
+#   3. you switch this file to the "latest" tag when ready
+
+# You can run `docker images` to list all the tags of available images:
 # For example:
 # REPOSITORY              TAG
 # qt-test-server-apache2  537fe302f61851d1663f41495230d8e3554a4a13
@@ -20,7 +29,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-apache2:537fe302f61851d1663f41495230d8e3554a4a13
+                provisioningImage: qt-test-server-apache2:latest
                 shareDir: ./common
                 serviceDir: ./apache2
         entrypoint: service/startup.sh
@@ -43,7 +52,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-squid:9c32f41b19aca3d778733c4d8fb0ecc5955e893c
+                provisioningImage: qt-test-server-squid:latest
                 shareDir: ./common
                 serviceDir: ./squid
         entrypoint: service/startup.sh
@@ -58,7 +67,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-vsftpd:f3a9c8d793a77cc007c0e4e481bec01f9e3eeb7e
+                provisioningImage: qt-test-server-vsftpd:latest
                 shareDir: ./common
                 serviceDir: ./vsftpd
         entrypoint: service/startup.sh
@@ -77,7 +86,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-ftp-proxy:d7de8b28392d173db512a558ccc84ead8bece2ae
+                provisioningImage: qt-test-server-ftp-proxy:latest
                 shareDir: ./common
                 serviceDir: ./ftp-proxy
         entrypoint: service/startup.sh
@@ -102,7 +111,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-danted:35607f9b790524cf9690c7d12a9a401696b7b6b5
+                provisioningImage: qt-test-server-danted:latest
                 shareDir: ./common
                 serviceDir: ./danted
         entrypoint: service/startup.sh
@@ -117,7 +126,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-cyrus:c8d72754abc0e501afd624ce838e4df35505abc9
+                provisioningImage: qt-test-server-cyrus:latest
                 shareDir: ./common
                 serviceDir: ./cyrus
         entrypoint: service/startup.sh
@@ -132,7 +141,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-iptables:cb7a8bd6d28602085a88c8ced7d67e28e75781e2
+                provisioningImage: qt-test-server-iptables:latest
                 shareDir: ./common
                 serviceDir: ./iptables
         entrypoint: service/startup.sh
@@ -150,7 +159,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-echo:b29ad409e746a834c1055fd0f7a55fd5056da6ea
+                provisioningImage: qt-test-server-echo:latest
                 shareDir: ./common
                 serviceDir: ./echo
         entrypoint: service/startup.sh
diff --git a/tests/testserver/docker-compose-host-network.yml b/tests/testserver/docker-compose-host-network.yml
index 4b2e1ebdab..aedd94cf73 100644
--- a/tests/testserver/docker-compose-host-network.yml
+++ b/tests/testserver/docker-compose-host-network.yml
@@ -1,14 +1,7 @@
 version: '2.1'
 
-# The tag of images is used by docker compose file to launch the corresponding
-# docker containers. The value of tag comes from the provisioning script
-# (coin/provisioning/.../testserver/docker_testserver.sh). The script gets SHA-1
-# of each server context as the tag of docker images. If one of the server
-# contexts gets changes, please make sure to update this compose file as well.
-# You can run command 'docker images' to list all the tags of test server images.
-# For example:
-# REPOSITORY              TAG
-# qt-test-server-apache2  537fe302f61851d1663f41495230d8e3554a4a13
+# For details about the "latest" tag used in the images here, see comments in
+# docker-compose-bridge-network.yml
 
 services:
     apache2:
@@ -20,7 +13,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-apache2:537fe302f61851d1663f41495230d8e3554a4a13
+                provisioningImage: qt-test-server-apache2:latest
                 shareDir: ./common
                 serviceDir: ./apache2
         entrypoint: service/startup.sh
@@ -39,7 +32,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-squid:9c32f41b19aca3d778733c4d8fb0ecc5955e893c
+                provisioningImage: qt-test-server-squid:latest
                 shareDir: ./common
                 serviceDir: ./squid
         entrypoint: service/startup.sh
@@ -54,7 +47,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-vsftpd:f3a9c8d793a77cc007c0e4e481bec01f9e3eeb7e
+                provisioningImage: qt-test-server-vsftpd:latest
                 shareDir: ./common
                 serviceDir: ./vsftpd
         entrypoint: service/startup.sh
@@ -71,7 +64,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-ftp-proxy:d7de8b28392d173db512a558ccc84ead8bece2ae
+                provisioningImage: qt-test-server-ftp-proxy:latest
                 shareDir: ./common
                 serviceDir: ./ftp-proxy
         entrypoint: service/startup.sh
@@ -90,7 +83,7 @@ services:
         build:
             context: .
             args:
-                provisioningImage: qt-test-server-danted:35607f9b790524cf9690c7d12a9a401696b7b6b5
+                provisioningImage: qt-test-server-danted:latest
                 shareDir: ./common
                 serviceDir: ./danted
         entrypoint: service/startup.sh