Release note

Qt 6.6.2 release is a patch release made on the top of Qt 6.6.1.
As a patch release, Qt 6.6.2 does not add any new functionality but provides
bug fixes and other improvements and maintains both forward and backward
compatibility (source and binary) with Qt 6.6.1.

For detailed information about Qt 6.6, refer to the online documentation
included in this distribution. The documentation is also available online:

https://doc.qt.io/qt-6/index.html

The Qt version 6.6 series is binary compatible with the 6.5.x series.
Applications compiled for 6.5 will continue to run with 6.6.

Some of the changes listed in this file include issue tracking numbers
corresponding to tasks in the Qt Bug Tracker:

https://bugreports.qt.io/

Each of these identifiers can be entered in the bug tracker to obtain
more information about a particular change.

To make it easier to port to Qt 6, we have created a porting guide to
summarize those changes and provide guidance to handle them. In the
guide, you can find links to articles about changes that may affect your
application and help you transition from Qt 5.15 to Qt 6:

https://doc.qt.io/qt-6/portingguide.html

Important Changes

Security fixes

CVE-2024-25580 in qtbase
CVE-2023-51714 in qtbase

qtbase

9ceb7cb555 QMimeDatabase: handle buggy type definitions with circular
inheritance
Added code to detect and break circular inheritance loops in the MIME
data, which were causing infinite loops
14c4da28f1 configure: Make sure the configure script exits with
cmake's exit code
The configure script on UNIX systems will now exit with the same exit
code that the underlying cmake process exited with.
59a2d5bdba SQLite: Update SQLite to v3.44.1
Updated SQLite to v3.44.1
28bdd104fd OpenSSL: remove support for 1.1
Support for OpenSSL 1.1 has been dropped. Qt now only supports OpenSSL
6adf78c511 macOS: Implement QPlatformServiceColorPicker via
NSColorSampler
Non native color dialogs now use native color picking when picking
colors from the screen.
5c8e47d2dd SQLite: Update SQLite to v3.44.2
Updated SQLite to v3.44.2
7270e2ab75 Fix QStringConverter::encodingForName() for trailing -,
_
Fixed a bug where encodingForName() failed due to trailing characters
(_, -) that ought to have been ignored.
cf26c939d7 Fix return value of qbswap(qint128)
Fixed return type of qbswap(qint128) (was: quint128).
19a473137a Fix Maximized frameless window painting wrong with
WS_THICKFRAME
Adding a check for the maximized state of the window during the
calculation of margins. Margins calculation will not be skipped for
maximized windows.
57e98a4136 SQLite: Update SQLite to v3.45.0
Updated SQLite to v3.45.0
e2598f175f QUuid: Fix Id128Bytes alignment on some architectures
The QUuid::Id128Bytes type had a loose definition that could cause it
be passed incompatibly between functions, in some architectures,
depending on whether GNU extensions were allowed. This is now fixed, but
may cause code compiled with Qt 6.6.0 and 6.6.1 to fail when recompiled
with 6.6.2 or later.
f7add7ad0f Increase precision for QGraphicsView::AnchorUnderMouse
Increase precision for QGraphicsView::AnchorUnderMouse and
QGraphicsView::centerOn
a619b6dd41 SQL/MySQL: Fix compilation with MySQL 8.3
Fixed compilation with MySQL 8.3.
6914f7ce3b Update Zlib to 1.3.1
zlib was updated to version 1.3.1.
bf196d0dd3 Doc: Update Copyright in md4c license text
Updated md4c (optional part of Qt Gui) to version 0.5.1.
0710865eed API Review Widgets: Remove QDockWidget debug operators
Removed debug streaming operator incorrectly introduced as a new symbol
in Qt 6.6.1.
1ac17f25fa Update bundled libpng to version 1.6.41
libpng was updated to version 1.6.41
bda58a780c SQLite: Update SQLite to v3.45.1
Updated SQLite to v3.45.1
d1348ac94f Update md4c to 0.5.2
md4c was updated to 0.5.2.
736d6300bb CMake: Fix undefined symbol: qt_resourceFeatureZstd issue
Targets created with qt_add_executable and qt_add_library will now add
the --no-zstd option to AUTORCC_OPTIONS when the target platform does
not support zstd decompression. You can opt out via the
QT_NO_AUTORCC_ZSTD cmake variable.
f9537eda1d Update bundled libjpeg-turbo to version 3.0.2
libjpeg-turbo was updated to version 3.0.2
303586dd18 Update bundled libpng to version 1.6.42
libpng was updated to version 1.6.42

qtdeclarative

29fc139acc Disable TapHandler.longPressed signal if longPressThreshold
== 0
TapHandler.longPressThreshold can now be set to 0 to disable its press-
and-hold feature, and can be reset to undefined to restore the platform
default.
d8a4fda904 Drawer: adjust opening edge to the rotation of the window's
content item
If the window's content item is rotated, then the drawer will adapt the
edge from which it can be drawn out accordingly. Only multiple of 90
degrees are supported.
852067de0c QML: Let IDs in outer context override bound components'
properties
In QML documents with bound components, IDs defined in outer contexts
override properties defined in inner contexts now. This is how
qmlcachegen has always interpreted bound components when generating C++
code, and it is required to make access to outer IDs actually safe. The
interpreter and JIT have previously preferred inner properties over
outer IDs.
18fc3862d0 MessageDialog: Dont rely on accept or reject signal
emissions from QPA
The MessageDialog will now close when a button is pressed, regardless
of the button's role.
9e44f21a2e CMake: Fix the all_qmllint* targets for VS generators, take
II
When using CMake's Visual Studio project generator, the creation of the
targets all_qmllint, all_qmllint_json and all_qmllint_module requires
now CMake 3.19 or newer. A warning is printed for older CMake versions.
This warning can be disabled by setting QT_NO_QMLLINT_CREATION_WARNING.

qttools

96289e100 CMake: Fix qt_add_translations in different subdirs for VS
generators
When using CMake's Visual Studio project generator, the creation of the
update_translations target requires now CMake 3.19 or newer. A warning
is printed for older CMake versions. This warning can be disabled by
setting QT_NO_GLOBAL_LUPDATE_TARGET_CREATION_WARNING to ON.

qt3d

dbc230139 Enable uniform buffer for RHI compute shaders
Enable uniform buffer for RHI compute shaders

qtgrpc

1906fad Add the missing Licenses and Attributions sections
qtprotobufgen, qtgrpcgen tools link against protobuf libraries,
licensed under BSD 3-clause "New" or "Revised" License. This is now
documented.

qtinsighttracker (Commercial only)

148593e Support remote configurations
Application's insight tracker configuration can be changed at runtime
from the Qt Insight Console.
d9dc7f6 Support compressed sqlite databases
The SQLite event storage can now be compressed with either zlib or zstd
algorithms.
5cb9322 Add context data to event API
New API: Context data can now be included in the interaction and
transition events.

Fixes

qtbase

QTBUG-118458 TLS Invalid Token
QTBUG-105395 WM_TRANSIENT_FOR is not kept in sync
QTBUG-41696 QApplication::widgetAt() doesn't work with widgets with
Qt::WA_TransparentForMouseEvents on Mac
QTBUG-119092 [REG: 6.5.2->6.5.3] macOS: topLevelAt/widgetAt cannot
find something under a window with setIgnoresMouseEvents set
PYSIDE-2525 Segfaults related to QMenu on macOS
QTBUG-102831 QCompleter's suggestion list hides native Chinese Input
method
QTBUG-114188 QMdiArea::TabbedView not honored with single subwindow
QTBUG-117762 "The cached device pixel ratio value was stale on window
expose" when closing window on Wayland
QTBUG-112479 Touch Drag doesn't cause mousePressEvent after Touch
Press
QTBUG-119032 Mouse Release is not fired with touch screen
QTBUG-100688 TapHandler doesn't emit onDoubleTapped when using a
touchscreen
QTBUG-119219 macOS: NPE in QNSWindow applicationActivationChanged
QTBUG-118605 CTRL+Tab don't work in combobox
QTBUG-115156 Last character missing with JAWS
QTBUG-119366 QTabBar is incorrectly offset when changing the
TabPosition
QTBUG-111528 Android font does not depend on locale/OS preference but
is hardcoded
QTBUG-117765 moc chokes on from xcode13
QTBUG-114539 QToolButton arrow clipped on screen with non-integer
device pixel ratio
QTBUG-119338 Objective-C usage can result in undefined behavior (part
2)
QTBUG-87334 Graphical issue on some Android smartphones: white line at
the top and the right side of the screen
QTBUG-119239 Incorrect reading of Plain PBM images
QTBUG-118416 [wasm] Signal from another thread is discarded while the
thread is temporarily blocking
QTBUG-106928 QObject: Cannot create children for a parent that is in a
different thread when exiting Android app
QTBUG-118421 TextField logs "Cannot create children for a parent that
is in a different thread" when closing virtual keyboard
QTBUG-88508 some tests are not saving result output to file on Android
QTBUG-115045 Don't overwrite my CMAKE__POSTFIX
QTBUG-115730 Qt uses Macros and config files from install tree when
building qtdeclarative "again"
QTBUG-119511 windeployqt -v has no effect
QTBUG-64373 QPushButton with RightToLeft layoutDirection and an icon
crops text in Fusion style
QTBUG-114253 [REG: 5.11->6] Performance issue with loading images in
static build
QTBUG-119424 windows: Too long tooltip crashes
QTBUG-118070 When configuring with debug info, installed libraries
shoudn't be stripped
QTBUG-118907 Not correct QDataStream version
QTBUG-106479 androidtestrunner does not honour QTEST_FUNCTION_TIMEOUT
QTBUG-115298 Androidtestrunner freezes after obtaining SDK version
QTBUG-119602 PainterPaths-Graphic&Multimedia-Example typo in the
documentation
QTBUG-118568 qvulkanwindow repeatedly recreate swapchain
QTBUG-119499 Document QMessageAuthenticationCode using HMAC
QTBUG-116898 Change deprecation information for
QtFuture::makeReadyFuture
QTBUG-119716 qt6_add_repc_sources produces an error if a genex is used
for preprocessor macros
QTBUG-119464 QSslSocket::setCiphers() documentation uses weak cyphers
QTBUG-118223 QDockWidget generates leftover containers + crash
QTBUG-99136 QDockWidget not correctly parented/setup if dragged from
another floating and tabified QDockWidget
QTBUG-118578 Undocking tabbed widget from floating window creates
empty redundant window
QTBUG-118579 Undocking tabbed widget from main window onto the
floating window crashes app
QTBUG-56799 [QDockWidget - Crash] Double Clicking to re-parent docks
can cause a crash.
QTBUG-35736 "Index out of range" situation in QMainWindowLayout class
QTBUG-63448 Undocking window does not send topLevelChanged signal
QTBUG-88329 Delete a QDockWidget while drag in progress causes crash
QTBUG-88157 tabPosition called with out-of-bounds when closing an
undocked QDockWidget
QTBUG-94097 creating QDockWidget after application startup prevents
correct termination on Ubuntu
QTBUG-44540 QDockAreaLayoutInfo crashes in restoreState (l. 1978-9)
when restoring closed, floating QDockWidget
QTBUG-53808 QDockWidget losing decoration on undocking when
GroupedDragging is enabled
QTBUG-72915 QDockWidget doesn't properly dock anymore after it was
undocked (regression)
QTBUG-53438 QMainWindow: tabbed QDockWidgets leave invisible QTabBar
QTBUG-116350 Fix documentation to refer to QNtfsPermissionCheckGuard
instead of qt_ntfs_permission_lookup
QTBUG-114849 Big icons in QTabWidget are badly aligned (regression
from Qt5 to Qt6)
QTBUG-119650 Model adapter/replica incompatible across different Qt
versions and platforms
QTBUG-119526 [Reg 6.6.0->6.6.1]QCocoaAccessibility Crash with Mac
VoiceOver enabled
QTBUG-118585 "Crash" in QMacAccessibilityElement initWithId:role:
QTBUG-118800 Programmatically selecting item view item breaks a11y
focus
QTBUG-119797 [Reg 6.5.3 -> 6.6.1]QFileIconProvider.icon of a file only
give general file icon
QTBUG-118667 QIcon::addFile() with an invalid filename results in
QFile::isNull() == false
QTBUG-119155 [REG: 6.5.2->6.5.3] headerDataChanged is now queued and
parameters may be out of sync
QTBUG-119371 [macOS] (File|Folder)Dialog.currentFolder holds stale
data
QTBUG-119054 Mac: Focus issues when embedding into non-Qt apps
QTBUG-120025 The QMainWindowLayout::restoreState causes a crash
QTBUG-118642 [Reg6.4->6.5]WebAssembly - QML - failing to use Noto
Color Emoji font
QTBUG-49720 Documentation for QFileDialog::DontConfirmOverwrite should
mention QFileDialog::AcceptMode
QTBUG-18057 QPixmap::toWinHBITMAP(): 2 Bugs when running out of memory
(Access violation or lost HBITMAP handle)
QTBUG-119406 QFuture::then() with context object deadlocks
QTBUG-119103 QFuture hangs when continuation uses a context object and
is resolved from the same thread
QTBUG-117918 Debug builds with QFuture::waitForFinished and same-
thread continuations may deadlock
QTBUG-119579 [Reg 6.5 -> 6.6] Calling QPromise::finish() from the same
thread deadlocks i
QTBUG-119810 QFuture continuation with deleted context
QTBUG-120036 DFEATURE_libjpeg CMake option not working
QTBUG-120006 DeleteStartOfWord with a selection in QLineEdit has
unexpected behavior
QTBUG-119225 [Reg 6.2 -> 6.5] QSplashScreen no longer shows on Linux
with a single call to QCoreApplication::processEvents()
QTBUG-120054 Reg6.4->6.5 Stylesheet has no Effect on QMessageBox
QTBUG-119306 drawPoints and drawPolygon don't match
QTBUG-119972 Clang-tidy reports possible memory leak with
QMetaObject::invokeMethod
QTBUG-115765 QAbstractItemView::EditingState: state stale when editing
with a proxy model
QTBUG-117903 WM_CHAR creates unwanted keyboard event - activating
shortcut
QTBUG-119309 Qt fails to flush to Mac native sub window when tlw is
RHI
QTBUG-119902 Crash in QImage::scaled
QTBUG-110266 affine example crashes when moving the center hoverpoint
QTBUG-119167 Atspi.Table.get_row_column_extents_at_index can cause
segfault in tree
QTBUG-118225 QtQuick Loader doesn't load over http(s)
QTBUG-120050 Configuring a CMake-based Qt WASM project fails if emsdk
path has spaces
QTBUG-119752 Customized QToolTip with padding or margin displays
incorrectly
QTBUG-119708 VS2022 simple program fails to link in Release mode with
ProtobufWellKnownTypes
QTBUG-112920 FTBFS qt 6.5.0 on gcc 9
QTBUG-120062 Non-native QFileDialog gets frozen on destruction if
remote mapped drive is disconnected
QTBUG-115260 Hang during drag and drop [REG]
QTBUG-120055 When dragging QTableView columns scrolling behaves oddly
QTBUG-113573 When dragging a header section it will no longer scroll
when at the edge
QTBUG-47159 QFileDialog::selectFile does not keep native separators
QTBUG-120141 cmake build of a Qt project with static Qt linkage fails
due to error in qtbase/cmake/FindWrapResolv.cmake
QTBUG-119619 CMake deploy script finds x64 libraries for WoA
application.
QTBUG-117704 Dragging Window handling WM_NCCALCSIZE and WM_NCHITTEST
squishes contents
QTBUG-120121 a11y QComboBox: Problematic signal/slot activation order
QTBUG-120125 CMake subarch extraction does not always succeed
QTBUG-120257 widgets/itemviews/editabletreemodel not compiling on
Android
QTBUG-113865 [Text Editor]Using undo function causes the app to crash
QTBUG-120012 Limiting maximum allocation size for QDataStream
QTBUG-119178 Crash after registering an invalid resource file
QTBUG-120107 PDF view gets render mistakes on Android 10
QTCREATORBUG-30117 Help viewer: "[read-only]" tags have unreadably low
contrast in dark mode
QTBUG-120379 The QStringLiterals header is lost
QTBUG-119808 [REG 6.1 -> 6.6] QPlainTextEdit: Placeholder is not
hidden on input
QTBUG-118161 QFileDialog::getOpenFileContent not working in sometimes
QTBUG-116989 wasm: pen pointerhandler example does not work as
expected
QTBUG-101404 wasm: mobile keyboard keeps popping on on android
QTBUG-120327 Pen PointerEvents not handled in WebAssembly (fix
attached)
QTBUG-119995 QML - Text - Font weight - macOS/Windows difference
QTBUG-112870 clang-tidy warnings on static global variables in moc
generated code
QTBUG-113507 macOS: Popups opening on wrong screen
QTBUG-67708 QGroupBox title does not follow vertical alignment with
fusion style
QTBUG-103825 Wrong resolution of Icon in Windows (Toast) Notifications
QTBUG-120335 On certain machines QtConcurrent crashes if no free
threads on thread pool
QTBUG-120614 QImage::convertToFormat: wrong conversion from RGBA64 to
RGBA16FPx4
QTBUG-120302 AddressSanitizer: heap-use-after-free in
tst_QFuture::continuationsWithContext()
QTBUG-120574 QComboBox popup high decreases when hiding view items
QTBUG-83604 QSlider with ticks is glitchy with QFusionStyle
QTBUG-120572 [QDoc] Redundant text in QTabBar detailed description
QTBUG-120297 Q_GADGET forces following elements to be private
QTBUG-120758 qtdeclarative fails to build with conan 2 on windows:
include path too long
QTBUG-120474 4xMSAA doesn't work with Mali400 using Lima driver
QTBUG-117975 Memory leaks when QObject::deleteLater is used without
QApplication runloop
QTBUG-117533 QProcess does not work with thread sanitizer
QTBUG-117954 QProcess::startDetached quits application when running
with ASAN
QTBUG-104493 Application performance drops if many threads are running
while QProcess creates sub-processes on Unix
QTBUG-120624 UB when passing null string to QString::arg()
QTBUG-120350 QOffScreenSurface::isValid always returns false on
WebAssembly
QTBUG-58005 ibus: commit does not properly reset the preedit string
QTBUG-120487 Symlinks generated in user_facing_tool_links.txt during
configuration are incorrect for MacOS
QTBUG-120732 Qimagereader manual test - Image file is missing
QTBUG-121041 Fusion style: add clip region for groupbox title
QTBUG-121030 QIconLoader failed to find icon in hicolor
QTBUG-121015 tst_QGuiApplication::topLevelAt() failed on Wayland
QTBUG-120485 QT_INSTALL_DOCS configured with wrong path
QTBUG-120619 QHttpServer with QtConcurrent blocks until the very first
request has finished before being able to process in parallel
QTBUG-118503 WASM: arrow keys and select-all not working for
QPlainTextEdit on touchscreen
QTBUG-119248 The result of calling serviceUUID is different in Q5 and
Qt6
QTBUG-120961 QLocale::monthName() doesn't work correctly on Windows
QTBUG-121204 ~unique_ptr() static assertion failure due to incomplete
type T (C++23)
QTBUG-120577 qt6.5.3 QTextEdit can't display image ! but qt5.15 is ok
。
QTBUG-120968 QProcess::start(): Fix docs about Starting state on
Windows
QTCREATORBUG-30066 Git commands fail on windows when using the
QProcess backend
QTBUG-120976 REG: QPushButton of a menu will still appear pressed even
after you click somewhere outside the button area.
QTBUG-121183 [QMYSQL] The mysql_list_fields() was removed in MySQL
v8.3
QTBUG-120509 Crash when Qt re-create native windows if
WA_DontCreateNativeAncestors is set
QTBUG-121512 [Reg 6.6.0(1) -> 6.6.2] Drag & Drop not working in
Designer
QTBUG-119216 macOS: REG->6.5: DnD with custom text MIME type got
broken/crashes
QTBUG-120469 Crash in QCocoaSystemTrayIcon::emitActivated() when
calling QComboBox clear() then addItem()
QTBUG-121008 Crash in QMacAccessibilityElement when using
QTreeView/QCombobox
QTBUG-121515 [Reg 6.6.1 -> 6.6.2] QNetworkAccessManager never finishes
request if server sends status code 401 without a challenge
QTBUG-121514 [Reg 6.6.0->6.6.2] Focus wrong in dialog with
QDialogButtonBox
QTBUG-121557 [Reg 6.4.3->6.6] Application unusable after closing
nested message boxes
QTBUG-121948 RCC compression is broken when deploying to Android from
a Linux host using CMake
QTBUG-106466 build android app with Debian host fails on undefined
symbol qt_resourceFeatureZstd
QTBUG-101353 AUTORCC uses zstd even if Qt is build without rcc support
QTBUG-121697 Critical crash when creating QPlainTextEdit when using
styles/stylesheets.
QTBUG-121790 QApplication::setStyleSheet crashes QTextEdit
QTBUG-87438 corelib plugin tests fail on Android
PYSIDE-2492 uic does not generate enumeration name into enum values
causing type checking warnings
QTBUG-117702 qbittorrent dumped core
QTBUG-114604 Setting initial page orientation for QPrintDialog does
not work in Windows 11
QTBUG-119359 tst_QGuiEventLoop::processEvents is flaky on QNX
QTBUG-118489 Can't tab to last button in QDialogButtonBox
QTBUG-88264 [REG v6.0.0-beta3 -> dev] Top-level configure fails if
told to build tests
QTBUG-86035 Split QtBuild.cmake into smaller files
QTBUG-119490 qcocoaapplicationdelegate.mm:354:20: error: cannot
initialize return object of type 'BOOL'
QTBUG-119081 QProcessPrivate::waitForDeadChild() doesn't check
forkfd_wait's return code
QTBUG-119616 tst_Http2::duplicateRequestsWithAborts fails in CI
QTBUG-116905 QMimeDatabase doesn't return all glob patterns for mime
types specified in multiple locations
QTBUG-82434 Incorrect Appearance QCursor with AA_EnableHighDpiScaling
QTBUG-101141 moc: namespaced base class not properly resolved in
cpp.json file
QTBUG-119998 CMake errors out with recursion in latest dev when using
qt-cmake-standalone-test on in-source auto test
QTBUG-111443 macOS/iOS: "Detected system locale encoding (US-ASCII,
locale "C") is not UTF-8"
QTBUG-119077 CMake deployment API does not deploy Qt Webengine
QTBUG-116577 ASSERT: "sumFactors > 0.0" in qgridlayoutengine.cpp
QTBUG-120196 Maximized frameless window painting wrong view region
with Qt::FramelessWindowHint and Windows api WS_THICKFRAME
QTBUG-115125 QObject::connect warns, but also fails to connect to
lambdas with Qt::UniqueConnection
QTBUG-118829 androiddeployqt with --release includes various
qmltooling libs
QTBUG-117443 Two Android executables mix their build artifacts if
targets are added in a single CMakeLists.txt
QTBUG-114583 Headers use things in without including it
QTBUG-120460 tst_QHostInfo::reverseLookup() fails on qemu and blocks
CI
QTBUG-109877 macOS: QFileDialog::getSaveFileName() truncates a
compound extension
QTBUG-99750 cannot activate file system watcher in QFileSystemModel
QTBUG-117910 [windeployqt] The QtPDF module will always be deployed if
it's installed
QTBUG-116763 out-of-bounds operator+
QTBUG-113498 QVideoWidget in QDialog does not show / crashes (macOS)
when shown twice
QTBUG-119601 iOS: Sometimes soft keyboard can't be closed
QTBUG-96879 QGraphicsView::setTransformationAnchor(AnchorUnderMouse)
drifts when zooming with trackpad

qtdeclarative

QTBUG-29676 Signals not disconnected when target object is destroyed
QTBUG-75483 QML Tooltip visibility is set to false but should not
QTBUG-115166 qt_add_qml_module() causes non-Ninja generators to think
that projects are never up-to-date
QTBUG-93856 Menus with a certain fixed height, element height and
window height not scrolled when they should
QTBUG-119132 it should be possible to disable the
TapHandler.longPressed signal
QTBUG-105810 iOS: TapHandler emits clicked, even if long pressed more
than StyleHint::MousePressAndHoldInterval
QTBUG-119091 QmlCacheGen crashes on QML-file, but won't disclose
where/why it cashes
QTBUG-119090 QmlCacheGen miscompiles Enum constant reference, yielding
"undefined"
QTBUG-53987 Cursor is not updated on mouse wheel over flickable
QTBUG-90457 HoverHandler.cursorShape doesn't change dynamically within
same bounds
QTBUG-54019 regression in certain MouseArea hover use cases
QTBUG-115696 Delegates are not re-positioned when ListView orientation
is changed runtime
QTBUG-119122 Using a specific as-cast asserts and fails compilation
QTBUG-112673 Drag.imageSource example - no image on first drag
QTBUG-115491 Drag.imageSource Only Works On Second try
QTBUG-118779 QT quick control-wearable demo-example Issue with the
background when switching light/dark mode
QTBUG-119298 [macOS] Using Imagine style controls provokes Qt warning
QTBUG-119181 Crash in QQmlDelegateModelGroup::insert
QTBUG-83155 Roboto font used in Material style slows down startup time
QTBUG-115121 PathView can be clicked through if it is flicking and
delegate has MouseArea
QTBUG-119216 macOS: REG->6.5: DnD with custom text MIME type got
broken/crashes
QTBUG-119165 qmlsc: QUrl does not compile in console.log()
QTBUG-80910 Drawer item does not support rotation
QTBUG-71117 When the contentOrientation is changed for the
ApplicationWindow, then the Drawer does not drag out as expected
QTBUG-115536 Setting Window.contentOrientation breaks Popup on regular
desktop
QTBUG-119160 Graphics corruption when toggling depth-aware rendering
QTBUG-119005 QML FileDialog file size overflow
QTBUG-115710 [Windows and WSL2] QML module that only contains C++ code
breaks all_qmllint target
QTBUG-119147 Invalid input not handled in Qt Quick Controls - Contact
List example
QTBUG-119451 the document is incorrect about the data type in the code
snippet
QTBUG-119162 Qml: Behaviour differs between interpreted/compiled code
QTBUG-118902 Qmltyperegistrar doesn't escape "-" in "#ifdef" generated
code
QTBUG-119531 [Reg 6.6.0 -> 6.6.1] TypeError: Type error with aliases
QTBUG-119084 Connections type doesn't work in qmltc'ed app
QTBUG-117948 qt_generate_deploy_qml_app_script() deploys QML plugin
target but not the corresponding backing target
QTBUG-119838 [REG] qt_add_qml_module broken for the VS generator when
called in different subdirectories
QTBUG-119395 crash on QML property bindings
QTBUG-118445 Native macOS MessageDialog doesn't reopen
QTBUG-118212 [Reg 5.15->6.x][Android] MessageDialog's standard buttons
do not accept/reject the dialog
QTBUG-120005 Native TextArea: placeholderText does not respect
horizontalAlignment
QTBUG-108807 QQC2 TabBar first TabButton visual state incorrect when
deselected
QTBUG-109488 tst_qquicktextedit FAIL
QTBUG-119715 REG: ScrollView content size broken
QTBUG-119675 [qmllint ] Enabling the qmllint for a lot of QML files
exceeds the command line limitation on Windows host
QTBUG-117387 TapHandler and DragHandler interoperability breaks
QTBUG-66360 PointHandler goes inactive releasing mouse button when
multiple pressed
QTBUG-83980 HoverHandler: sometimes point.position returns (0, 0)
QTBUG-119363 UniformAnimator makes app crash when being destroyed by
other component
QTBUG-119793 QML Button (Material 3) contents truncated
QTBUG-119640 Typo in the document
QTBUG-119794 QJSValue: url does not convert to QUrl
QTBUG-119963 [Reg 6.5.1->6.5.3] QJSEngine no longer converts new'ed JS
object to QVariantMap
QTBUG-120205 [REG: 6.5->6.6] Image implicitWidth/Height no longer
available in onStatusChanged
QTBUG-119916 Non-native FileDialog does not prompt about overwriting
an existing file
QTBUG-120349 Window Qml Type doc is missing the default visible
property value
QTBUG-116306 Mention indeterminate state for Qt Quick Controls 2
ProgressBar customization
QTBUG-120346 hovered property of HoverHandler stays true when sliding
by touch outside of hover area
QTBUG-117899 [REG 6.4->6.5] Binding Loops -> Wrong layout because of
interruption
QTBUG-118511 Binding loop if ColumnLayout implicitWidth is changed
QTBUG-120296 Qt Quick Widgets Example - Grab Framebuffer is
susceptible to crash
QTBUG-119917 Non-native FileDialog loses current filename when
changing folders
QTBUG-120052 TextArea/TextField: placeholderText does not respect
horizontalAlignment after the component creation
QTBUG-119646 [Tests] Warnings in
qtdeclarative/tests/auto/quickcontrols/controls/data/tst_textfield.qml
QTBUG-119645 [Tests] Warnings in
qtdeclarative/tests/auto/quickcontrols/controls/data/tst_textarea.qml
QTBUG-99231 "Could not set initial property horizontalAlignment" when
trying to set resettable property
QTBUG-119372 build fails with Q_IMPORT_QML_PLUGIN macro
QTBUG-120628 TableView: cannot select cells when using mouse press +
shift
QTBUG-113776 qmlformat fails to format if there is a escape char in
the key string
QTBUG-119760 Crash when dereferencing a deleted QRhi after native
window is re-created
QTBUG-106598 MessageDialog won't open if its parent is a plain item
QTBUG-121022 Miscompilation of condition
QTBUG-119992 qt5 code is used for the qt6.6 documentation
QTBUG-121206 NO_LINT has not effect in qt_add_qml_module
QTBUG-121132 TableView: overlapping selections are cleared
QTBUG-120555 AnimatedImage: issues with loading web source
QTBUG-121139 qmlcachegen locks up in some situations
QTBUG-121035 QSettings::value("Theme") returns an empty QByteArray if
beginGroup has been called
QTBUG-120479 qmldir file not placed with library with CMake Xcode
generator
QTBUG-113558 QQuickWidget does not handle touch event via QML
TapHandler correctly
QTBUG-65012 TapHandler: should not emit longPressed if the point is
dragged
QTBUG-102846 [Windows] Restoring OpenGL context logic doesn't seem
valid
QTBUG-114718 [Tests] tst_QQuickPopup fails
QTBUG-118163 Flaky race-condition in QuickTest when running
tst_inputpanel built with ASAN
QTBUG-111873 qt_attributions.json files should be valid JSON
QTBUG-119663 extending qml tutorial cannot be found in the examples
available in the qt creator
QTBUG-120262 Use SPDX-License-Ref in 3rdparty directories
QTBUG-108808 QQC2 BusyIndicator does not inherit visibility from
parent consistently
QTBUG-117667 REG: TextEdit height gets stuck due to binding loops
(forever) or anchor changes (temporarily until further resize event)
QTBUG-25489 QtQuick2 TextEdit emits unnecessary cursorRectangleChanged
on all kinds of modifications

qtmultimedia

QTBUG-119083 MediaPlayer-Graphic&Multimedia There exists an empty
selection when going through next and previous media
QTBUG-118699 The video playback is corrupted with Android native
backend
QTBUG-118777 Emulation layer crash / cannot run project after adding
two Audio Listeners
QTBUG-118309 QML Camera - Zoom not observed in Preview
QTBUG-116324 Request to implement thumbnail realization for multimedia
FFMPEG backend
QTBUG-119089 QML Camera crashing on some devices
QTBUG-119445 Camera crash on image acquire on Android
QTBUG-117099 Video jerks when playing (Windows backend)
QTBUG-118734 Attribution scanner can not refer to files downloaded
during provisioning
QTBUG-119471 Camera usage randomly crashes when the camera surface is
destroyed with android backend
QTBUG-119236 Unexpected value for QML Camera.error enum
QTBUG-119693 [REG] 6.7.0 namespace build fails on Windows
(MSVC&MinGW), multimedia
QTBUG-118573 Android tests on CI part 3/3 (screen/window capture)
QTBUG-118839 [DeclarativeCamera] The app crashes when unlocking the
screen on Android
QTBUG-116519 [Reg 6.2 -> 6.5] Repeated QSoundEffect is broken on
PulseAudio
QTBUG-113616 Android: Crash when mapping QVideoFrame object
(minimize/restore)
QTBUG-118127 QMediaPlayer can not play sound again after the sound
finished.
QTBUG-120449 Qt6 Multimedia WebAssembly Docs reference nonexistent
method
QTBUG-118593 QML Camera ImageCapture Parameter not declared
QTBUG-113498 QVideoWidget in QDialog does not show / crashes (macOS)
when shown twice
QTBUG-118572 Android tests on CI part 2/3 (audio)
QTBUG-118587 [WMF] Video position may exceed it's duration
QTBUG-120198 Process abruptly terminates while executing static
destructor in Qt6Multimedia.dll
QTBUG-121455 QtMultimedia module fails Yocto CI build
QTBUG-116020 Audio from QMediaPlayer crackles and stutters on pause
and resume
QTBUG-117407 Document limitations of QScreenCapture
QTBUG-118668 QTextToSpeech::synthesize under window does not get data
QTBUG-118571 Android tests on CI part 1/3 (camera & media
capture/player)
QTBUG-117746 eglfs: Capturing the screen crashes
QTBUG-117878 Cannot capture screen from QQuickWidget
QTBUG-111045 QSoundEffect not playing
QTBUG-118099 Volume Discrepancies Between QMediaPlayer and
QSoundEffect with ffmpeg
QTBUG-111815 Bumpy rendering of D3D11 textures
QTBUG-111459 Heavy jittering in video playback if animations are
active
QTBUG-109213 Video flickering when there is a ParticleSystem component
or playing some animation at same time

qttools

QTBUG-119555 [REG] Qt 6.6.1 breaks qt_add_translations
QTBUG-115166 qt_add_qml_module() causes non-Ninja generators to think
that projects are never up-to-date
QTBUG-121226 qdoc extraimages.HTML not supported
QTBUG-62697 qhc files cannot be created in a reproducible way
QTBUG-120236 macOS: Qt Designer appears on a start on macOS as if it
was broken
QTBUG-119051 With Linguist it seems only the last segment from the
XLIFF is used as translated string.

qtdoc

QTBUG-118754 assertObjectType is triggered with a correct signal/slot
connection on macOS
QTBUG-118672 [DocumentViewer] Cannot open PDF files using the app.
QTBUG-119286 Typos in Thermostat example
QTBUG-119294 Settings tab in Thermostat example behaves oddly
QTBUG-119320 Thermostat example buttons inactive
QTBUG-119290 Icon highlighting in Thermostat example is barely visible
QTBUG-119297 Room icons in Thermostat example not correct
QTBUG-117647 Audio track is not played when opening audio file after
playing video file in media player example
QTBUG-117090 CMake docs: incorrect code example for
qt_generate_qml_app_script
QTBUG-120372 Typo in the document
QTBUG-119458 Initializing with QQuickView is missing cmake instruction
QTBUG-120364 [6.7 beta1] Qt Dice demo crashes on Android devices
QTBUG-120471 Fix minor issues in stocqt
QTBUG-121165 Error in WebAssembly documentation
QTBUG-121524 [REG 6.6.1 -> 6.6.2] StocQt CMake error for Android
QTBUG-115373 Hangman Demo uses unsupported version of Google Play
Billing Library
QTCREATORBUG-30077 TodoList example app does not work out of the box
QTBUG-120014 Dependency for libxcb-cursor0 since Qt 6.5 is not
mentioned in the documentation.

qtpositioning

QTBUG-118739 The SatelliteInfo demo app is constantly crashing

qtconnectivity

QTBUG-119060 Read access violation when calling stop() during
Bluetooth service discovery
QTBUG-119063 Segfault in Bluetooth module's Windows COM de-init
QTBUG-120410 NDEF Editor Example - Clicking on 'read tag' will erase
existing records

qtwayland

QTBUG-119110 There are potential crash issues when some submenus are
expanded.
QTBUG-118612 Large size cursor overlaps tooltips on linux
QTBUG-119136 qt creator does not restore to maximized state when
minimized from maximized state
QTBUG-118890 QWaylandWindow::reset() mutex race/deadlock with
QWaylandWindow::beginFrame()
QTBUG-120393 The link is ill formed in the document
QTBUG-120392 QWayland CSD window has unclickable area
QTBUG-120397 "output" property seems to be missing in WaylandQuickItem
QML type documentation
QTBUG-120477 Overriding swap interval for Wayland EGL windows doesn't
work
QTBUG-105703 QWaylandWindow::createDecoration() is called from
multiple threads

qt3d

QTBUG-116494 Documentation for QCylinderMesh misses Detailed
Description
QTBUG-77139 QText2DEntity isn't working with parent entity in
constructor
QTBUG-100387 QText2DEntity does not create any geometry in certain
cases
QTBUG-120964 delayed creation of QAttribute with parent in constructor
causes crash
QTBUG-119659 Qt3D RHI - Uniform buffers not bound for compute shaders
QTBUG-119137 ERROR: AddressSanitizer: heap-use-after-free in
tst_qmesh::checkSourceUpdate() in qt3d
QTBUG-69463 Camera view matrix computation unstable (regression)

qtimageformats

QTBUG-118797 ICNS format: QImageReader::setAllocationLimit() bug

qtserialbus

QTBUG-114397 QCanDbcFileParser will not parse signals with certain
valid utf-8 encoded characters

qtwebengine

QTBUG-119525 error: field ‘responseHeaders’ has incomplete type
‘QMultiMap’
QTBUG-115357 qt 6.5.2 fails to build from source with system libpng
(regression from 6.5.1)
QTBUG-119536 Lack of documentation regarding QPdfBookmarkModel's
document property
QTBUG-118995 Dev tools not working
QTBUG-118398 QWebEngineView in QScrollArea is not scrollable
QTBUG-119776 PDF Multipage viewer example - Clicking on previous
(upward arrow) will crash the example
QTBUG-104766 QtQuick.Pdf PdfDocument gets
"QCoreApplication::postEvent: Unexpected null receiver" warning when
instantiated standalone
QTBUG-120245 A crash occurred in C:\Users\qt\work\qt\qtwebengine_stand
alone_tests\tests\auto\pdfquick\multipageview\tst_multipageview.exe
QTBUG-120446 Alternated item color in list is not always alternated
QTBUG-119722 [REG 5 → 6] Default context menu is missing icons
QTBUG-104767 Using PdfPageImage instead of Image on PDF file results
in EXC_BAD_ACCESS (SIGSEGV)
QTBUG-118120 qtwebengine: build failure with x86_64h
QTBUG-119245 Qt Web Engine alert quotes not working
QTBUG-83338 Default implementations of javaScriptAlert/Confirm/Prompt
treat message as rich text
QTBUG-119789 [Accessibility] Qt 6.5.3 cannot be built with the option
' -no-feature-accessibility''.
QTBUG-119991 Unable to print at all if the first page of multi page
document is not printed
QTBUG-118746 Japanese input on macOS regressed in Qt 6.5.3
QTBUG-114865 macos: Building QtWebEngine with sanitizer enabled fails
QTBUG-116595 QtPfd build failure on 32-bit arm
QTBUG-119763 [REG 6.5.2?] Rare segfaults in
QWebEngineDownloadItem::page()
QTBUG-111873 qt_attributions.json files should be valid JSON
QTBUG-119077 CMake deployment API does not deploy Qt Webengine
QTBUG-119878 [Reg 5.15->6.x] Crash and/or bad output when printing via
Qt WebEngine's PDF plugin
QTBUG-120692 Cannot cross-compile webengine for x86_64

qtwebview

QTBUG-119356 WebViewSettings QML Type documentation of
javaScriptEnabled property has a spelling mistake

qtcharts

QTBUG-119712 QChartView prevents parent QScrollView from receiving
touch screen scroll events.
QTBUG-77403 Scrolling via trackpad does not work on Chart
QTBUG-119900 Deleting a visible QAbstractSeries with OpenGL enabled
causes an error

qtvirtualkeyboard

QTBUG-118565 VirtualKeyboard documentation incorrect
QTBUG-120262 Use SPDX-License-Ref in 3rdparty directories

qtscxml

QTBUG-119562 StateMachine Documentation wrong
QTBUG-120576 The Note is duplicated for EventConnection::occurred
QTBUG-120262 Use SPDX-License-Ref in 3rdparty directories

qtremoteobjects

QTBUG-117379 [REG: 5->6] Enums with ENUM in the type name cause error
in repc
QTBUG-120242 SubClassReplicaTest crashes

qtquicktimeline

QTBUG-119204 Not possible to exclude qtquicktimeline from the build

qtquick3d

QTBUG-119373 typo in the document
QTBUG-120579 The link to the Fog QML type is not correct
QTBUG-120431 QQ3DPhysics customshapes example looks different on
opengl vs d3d11
QTBUG-120629 Baking Lightmap fails with msvc2019 kit
QTBUG-120424 Segmentation fault in the process of loading/unloading 3D
objects
QTBUG-121390 Live Preview with a 3D project crashes on with Qt 6.6.1

qtmqtt

QTBUG-104478 Mqtt topic wildcard failure

qthttpserver

QTBUG-121219 QtHttpServer crashes when during GET of a larger content
remote closes connection

qtquick3dphysics

QTBUG-120045 Application crashes in Qt Quick 3D Physics

qtgrpc

QTBUG-119227 Segfault assigning to a moved-out protobuf message
QTBUG-119475 examples/grpc/magic8ball/clientservice.cpp:26:14: error:
invalid use of incomplete type ‘class QDebug’
QTBUG-119244 Non-packed repeated fields do not preserve the order when
making roundtrip as unknown fields
QTBUG-120227 AddressSanitizer: heap-use-after-free in QtProtobufRepeat
edTypesJsonDeserializationTest::RepeatedComplexMessageTest()
QTBUG-120432 Protobuf: Nested enums lack their protobuf and metatype
regestering
QTBUG-116640 Protobuf generator doesn't support C++ keywords field
names
QTBUG-120945 QGrpcChannelOptions::withMetadata
QTBUG-114079 qt_add_protobuf() macro should warn a user in case of
adding proto files with the same name
QTBUG-120946 QGrpcHttp2Channel description refers to deprecated
call/channel credentials

qtgraphs

QTBUG-121021 Qt Graphs module not marked as TP in the 6.6.x
documentation

qtapplicationmanager (Commercial only)

QTBUG-119476 qtapplicationmanager/src/main-lib/main.cpp:16:12: fatal
error: packagemanagerdbuscontextadaptor.h: No such file or directory
QTBUG-118743 Notification not dismissing when dismissOnAction is true

qtinterfaceframework (Commercial only)

QTBUG-119428 Enums in simulationData cannot be parsed correctly
QTBUG-122036 ModuleNotFoundError: No module named 'dataclasses'

qtvncserver (Commercial only)

QTBUG-119312 Cannot input text to an input field in a dialog
QTBUG-115515 Compiling Qt top level does not compiles Qt Vncserver

Known Issues

Check that your system meets Qt's requirements:
https://doc.qt.io/qt-6.6/supported-platforms.html
RTA reported issues from Qt 6.6
https://bugreports.qt.io/issues/?filter=25128
See Qt 6.6 known issues from:
https://wiki.qt.io/Qt_6.6_Known_Issues
Qt 6.6.2 Open issues in Jira:
https://bugreports.qt.io/issues/?filter=25663

Credits for the release goes to:

Eirik Aavitsland
Amir Masoud Abdol
James Addison
Laszlo Agocs
Konsta Alajärvi
Anu Aliyas
Tim Angus
Karolina Sofia Bang
Mate Barany
Vladimir Belyavsky
Nicholas Bennett
Eskil Abrahamsen Blomfeldt
Tatiana Borisova
Joerg Bornemann
Rym Bouabid
Assam Boudjelthia
Aurélien Brooke
Kai Uwe Broulik
Michael Brüning
Mike Chen
Ed Cooke
Alexandru Croitor
Mitch Curtis
Thibaut Cuvelier
Giuseppe D'Angelo
Szabolcs David
Pavel Dubsky
Artem Dyomin
Alexey Edelev
David Edmundson
Oliver Eftevaag
Christian Ehrlicher
Andreas Eliasson
Fabio Falsini
David Faure
Ilya Fedin
GHENADY
Samuel Gaist
Florian de Gaulejac
Zoltan Gera
Joshua Goins
Aleix Pol Gonzalez
Julian Greilich
Robert Griebl
Mikko Gronoff
Johannes Grunenberg
Kaj Grönholm
Richard Moe Gustavsen
Lucie Gérard
Kamil Hajdukiewicz
Rob Hall
Mikko Hallamaa
Jøger Hansegård
Inkamari Harjula
Andre Hartmann
Tero Heikkinen
Jani Heikkinen
Paul Heimann
Christian Heimlich
Alex Henrie
Ulf Hermann
Volker Hilsheimer
Dominik Holland
Samuli Hölttä
Allan Sandfeld Jensen
Maurice Kalinowski
Jonas Karlsson
Timothée Keller
Friedemann Kleint
Michal Klocek
Lars Knoll
Jarek Kobus
Sze Howe Koh
Jarkko Koivikko
Tomi Korpipaa
Jani Korteniemi
Fabian Kosmale
Volker Krause
Mike Krus
Santhosh Kumar
Ghenady Kuznetsov
Kai Köhne
Inho Lee
Paul Lemire
Wladimir Leuschner
Thorbjørn Lindeijer
Thiago Macieira
Ievgenii Meshcheriakov
Leena Miettinen
Safiyyah Moosa
Bartlomiej Moskal
Marc Mutz
Martin Negyokru
Andy Nichols
Mårten Nordheim
Dennis Oberst
Samuli Piippo
Timur Pocheptsov
Lauri Pohjanheimo
Joni Poikelin
Cajus Pollmeier
Alessandro Portale
Lorn Potter
Sakaria Pouke
MohammadHossein Qanbari
Liang Qi
Matthias Rauter
David Redondo
Arno Rehn
Topi Reinio
Shawn Rutledge
Ahmad Samir
Lars Schmertmann
Philip Schuchardt
Carl Schwan
Thomas Senyk
Ws ShawnWoo
Kristoffer Skau
Ivan Solovev
Axel Spoerl
Patryk Stachniak
Christian Strømme
Tarja Sundqvist
Audun Sutterud
Lars Sutterud
Tasuku Suzuki
Jan Arve Sæther
Morten Sørvig
Nodir Temirkhodjaev
Ivan Tkachenko
Orkun Tokdemir
Tuukka Turunen
Paul Olav Tvete
Esa Törmänen
Peter Varga
Doris Verria
Tor Arne Vestbø
Fabian Vogt
Alexander Volkov
Juha Vuolle
Sune Vuorela
Jaishree Vyas
Michael Weghorn
Bernd Weimer
Edward Welbourne
Paul Wicking
Piotr Wiercinski
Piotr Wierciński
Jakub Wincenciak
Milian Wolff
Oliver Wolff
Semih Yavuz
Vlad Zahorodnii
Yansheng Zhu
shjiu
Fredrik Ålund