5.15.6: add release note

Task-number: QTBUG-103411
Change-Id: I95119e622c7fec19f9904e2efc588e747e874463
Reviewed-by: Tarja Sundqvist <tarja.sundqvist@qt.io>

1 files changed, 489 insertions, 0 deletions

diff --git a/qt/5.15.6/release-note.md b/qt/5.15.6/release-note.md
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+Release note  
+============  
+  
+Qt 5.15.6 release is a patch release made on the top of Qt 5.15.5. As a patch  
+release, Qt 5.15.6 does not add any new functionality but provides bug fixes  
+and other improvements.  
+  
+For detailed information about Qt, see the Qt 5.15 online documentation:  
+https://doc.qt.io/qt-5/index.html.  
+  
+Important Changes  
+-----------------  
+  
+### qtbase  
+* a273c68018 QPageSize: make PageSizeId ctor non-explicit  
+Conversion from a QPageSize::PageSizeId is now implicit.  
+  
+* 8e6b4f5d2a Fix conversion of swap interval from QGLFormat to  
+QSurfaceFormat  
+Fixed an issue where the default swap interval of QGLWidget's surface  
+format would be set to an invalid value.  
+  
+* 0095b87903 macOS: allow Qt::AA_DontShowShortcutsInContextMenus  
+overrides  
+The shortcutVisibleInContextMenu property defaults to the value of the  
+Qt::AA_DontShowShortcutsInContextMenus attribute, which in turn defaults  
+to the platform integration. To override the default, set the  
+application attribute after instantiating QApplication, or override the  
+default for each QAction instance.  
+  
+* f76bea3951 Fix mapping between Han and other CJK scripts  
+Fixed an issue where certain shared CJK characters would be displayed  
+using the Chinese system font rather than the Japanese one, even on  
+Japanese locale.  
+  
+* 9572473e4f Revert "Windows: Add synthesized fonts also when there is a  
+style name"  
+Fixed a regression where different font styles and/or weights would not  
+be available.  
+  
+* 8cda03b066 Change QCollator's default locale to QLocale().collation()  
+The default locale used by QCollator is now the collation locale of the  
+default QLocale. This restores the ability (lost at 5.14) to control the  
+locale used by QString::localeAwareCompare(), while retaining the use of  
+a collation locale when the default is the system locale.  
+  
+* a8409dc92c QVarLengthArray: fix aliasing error in insert(it, n, v)  
+Fixed an aliasing bug affecting insertions of objects aliasing existing  
+elements.  
+  
+* 8ffc652f1e QXpmHandler: fix re-entrancy bug in xpm_color_name  
+Fixed a race condition when concurrently writing .xpm files.  
+  
+* b94eda4f81 QXpmHandler: actually limit characters-per-pixel to four  
+Instead of writing a corrupt file, rejects to write XPM files with more  
+than 64^4 colors (more than four characters per pixel) now.  
+  
+* dde4061f37 MySQL: remove the version number checks in favor of actual  
+functionality  
+Fixed the detection of whether the client and server support prepared  
+statements. This was caused by the mariadb connector library reporting  
+its own version numbers (starting in version 3.2) instead of the server  
+version.  
+  
+* 2762bbb5c3 Fix memory leak if eXIf has incorrect crc  
+Fix for possible memory leak in libpng was backported.  
+  
+### qtsvg  
+* 22388ac Limit font size to avoid numerous overflows  
+Avoid numerous overflows by limiting font size to 0xffff. This fixes  
+oss-fuzz issue 31701.  
+  
+### qtwayland  
+* a3ee3b1a client: Gracefully handle shutdown and window hiding  
+Fixed a crash that could happen when hiding or closing windows while Qt  
+Quick was actively rendering on a different thread.  
+  
+### qt3d  
+* 3e7af0520 Fix multi-view picking  
+Non rendered entities (due to layer filtering) are no longer pickable  
+  
+### qtimageformats  
+* d2f7d79 Update bundled libtiff to version 4.3.0  
+Bundled libtiff was updated to version 4.3.0  
+  
+### qtwebengine  
+* Security fixes from Chromium up to version 92.0.4515.159, including:  
+    - CVE-2021-30522: Use after free in WebAudio  
+    - CVE-2021-30523: Use after free in WebRTC  
+    - CVE-2021-30530: Out of bounds memory access in WebAudio  
+    - CVE-2021-30533: Insufficient policy enforcement in PopupBlocker  
+    - CVE-2021-30534: Insufficient policy enforcement in iFrameSandbox  
+    - CVE-2021-30535: Double free in ICU  
+    - CVE-2021-30536: Out of bounds read in V8  
+    - CVE-2021-30541: Use after free in V8  
+    - CVE-2021-30544: Use after free in BFCache  
+    - CVE-2021-30547: Out of bounds write in ANGLE  
+    - CVE-2021-30548: Use after free in Loader  
+    - CVE-2021-30551: Type Confusion in V8  
+    - CVE-2021-30553: Use after free in Network service  
+    - CVE-2021-30554 Use after free in WebGL  
+    - CVE-2021-30556: Use after free in WebAudio  
+    - CVE-2021-30559: Out of bounds write in ANGLE  
+    - CVE-2021-30560: Use after free in Blink XSLT  
+    - CVE-2021-30563: Type Confusion in V8  
+    - CVE-2021-30566: Stack buffer overflow in Printing  
+    - CVE-2021-30568: Heap buffer overflow in WebGL  
+    - CVE-2021-30569  
+    - CVE-2021-30573: Use after free in GPU  
+    - CVE-2021-30585: Use after free in sensor handling  
+    - CVE-2021-30587: Inappropriate implementation in Compositing on Windows  
+    - CVE-2021-30588: Type Confusion in V8  
+    - CVE-2021-30598: Type Confusion in V8  
+    - CVE-2021-30599: Type Confusion in V8  
+    - CVE-2021-30602: Use after free in WebRTC  
+    - CVE-2021-30603: Race in WebAudio  
+    - CVE-2021-30604: Use after free in ANGLE  
+    - Security bug 1184294  
+    - Security bug 1194330  
+    - Security bug 1194689  
+    - Security bug 1197786  
+    - Security bug 1198216  
+    - Security bug 1198385  
+    - Security bug 1202534  
+    - Security bug 1204814  
+    - Security bug 1205059  
+    - Security bug 1209558  
+    - Security bug 1211215  
+    - Security bug 1227933  
+    - Security bug 1228036  
+  
+### qtwebsockets  
+* 30b0376 Clear frame before emitting signals to prevent duplicating  
+messages  
+Clear frame before emitting signals to prevent duplicating messages  
+  
+### qtquickcontrols2  
+* 10ede696d ToolTip: use contentWidth of Text contentItem to account for  
+newlines  
+The implicit width of ToolTips now accounts for newlines in the text.  
+If you want to use the old behavior, set ToolTip's contentWidth to  
+implicitContentWidth.  
+  
+### qtvirtualkeyboard  
+* 0d2174eb Fix high CPU utilization caused by key repeat timer  
+Fixed high CPU utilization caused by key repeat timer.  
+  
+* 005e6f28 Fix processing of hard Qt::Key_Backspace and Qt::Key_Delete  
+Fix processing of hard backspace and delete keys.  
+  
+  
+Fixes  
+-----  
+  
+### qtbase  
+* QTBUG-94070 Memory corruption in sqlite plugin  
+* QTBUG-93600 90° X rotation as quaternion produces NaN on euler angle  
+* QTBUG-93295 Session Resumption with Session ID - IPv6 -  
+ephemeralServerKey is missing  
+* QTBUG-94087 [reg 5.11->5.15] No longer possible to start a drag from  
+item views with a double-click  
+* QTBUG-77771 A Double click on QtreeView/QTreeWidget index is emitting  
+two clicked() and one doubleClicked() signal  
+* QTBUG-94226 QListView - broken drag-n-drop items movement  
+* QTBUG-94269 QIntValidator: integer values exceeding top "intermediate"  
+according to validate() func  
+* QTBUG-86754 [Reg 5.12.4-> 5.12.5]Action text overlaps the shortcut in  
+menu when padding is used  
+* QTBUG-92234 QTranslator.load problem by skipping some  
+* QTBUG-70498 Cannot scroll first tab right, using scroll button in  
+QTabBar, when tab size do not fit into visible rect.  
+* QTBUG-56322 Qt for Android source package build error in examples  
+* QTBUG-36565 Some key symbols generated by xkb level 3 shift don't work  
+in QTextBrowser, QTextEdit, QLineEdit  
+* QTBUG-93742 Error in public function "setclearbuttonenabled" of  
+"QLineEdit" control  
+* QTBUG-91120 QDate::fromString() fails on isolated dates on macOS with  
+TZ=Europe/Lisbon  
+* QTBUG-94347 QRandomGenerator64 refers to functions as static, aren't.  
+* QTBUG-71894 Hangul composition bug  
+* QTBUG-94032 Command line is too long when building large projects  
+* QTBUG-94470 Incorrect parsing of HTTP2 frame headers.  
+* QTBUG-93764 QPrintPreviewDialog: printer orientation not updated by  
+QPageSetupDialog  
+* QTBUG-76948 IOS: disconnect second screen while app in b/g, it crashes  
+when app goes into foreground  
+* QTBUG-94532 Markdown checkboxes are clipped when text range selected  
+* QTBUG-89379 QQuickWindow::QtTextRendering cause font problem on Apple  
+M1  
+* QTBUG-83089 NameFilters not working in FileDialog in Android 10  
+* QTBUG-67944 If user pressed back button during application startup.  
+Application becomes unresponsive.  
+* QTBUG-65637 Window minimizing broken after building QT app with Mac OS  
+High Sierra SDK  
+* QTBUG-94246 Memory leak in qsql_oci plugin  
+* QTBUG-94069 MacOS ComboBox Focus Ring is Too Tall  
+* QTBUG-91919 Qt will crash if changing screen resolution on Mac  
+* QTBUG-94706 missing documentaiton details about QFile::copy()  
+* QTBUG-81251 _debug libraries are missing from pre build Qt on Mac  
+* QTBUG-83869 Correction to the documentation:  
+https://doc.qt.io/qt-5/qtransform.html#basic-matrix-operations  
+* QTBUG-85598 [REG: 5.13 -> 5.14] Japanese character appears incorrectly  
+* QTBUG-94175 QGraphicsProxyWidget: rendered Arabic text incomplete in  
+large font sizes when OpenGL is used  
+* QTBUG-91619 QCFSocketNotifier does not handle connect  
+* QTBUG-94781 [Reg-5.15.4->5.15.5] Bold font is not picked up when  
+QFontDatabase is used  
+* QTBUG-91398 When QFont::NoFontMerging is set then if bold or italics  
+is requested that is not provided by the font then it will end up not  
+synthesizing this  
+* QTBUG-94802 [Reg-5.15.4->5.15.5]Menu separator is not visible  
+* QTBUG-95005 Typo in QOpenGLPaintDevice::dotsPerMeterY  
+* QTBUG-94824 In qlinedit, icon and text overlap  
+* QTBUG-94463 QThreadPool creates one thread more than maxThreadCount  
+* QTBUG-92182 Qt Dock Widgets super slow to dock  
+* QTBUG-92232 [REG] Option Clicking Window Close Button Crashes App  
+* QTBUG-94799 QFileDialog file name completer doesn't work with Proxy  
+Model  
+* QTBUG-78043 non-native QFileDialog displaying incorrect mapped network  
+drive names  
+* QTBUG-91125 QTextFormat::FullWidthSelection does not work with right-  
+to-left text layout  
+* QTBUG-95042 QFrame Qt::WA_TranslucentBackground is broken with  
+specific window flags and drawable child item  
+* QTBUG-94981 QTreeView: expandToDepth() and expandAll() ends  
+prematurely for asynchronous models  
+* QTBUG-94788 QListView will be reset when setSelectionMode  is  
+MultiSelection  
+* QTBUG-86846 the password box not refreshed under Chinese input method  
+* QTBUG-95009 QNetworkDiskCache::cacheSize() returns a size twice as  
+large as the real one.  
+* QTBUG-94733 When the display is set to 150% and a QMdiSubWindow is  
+maximized then the icons can be incorrectly displayed  
+* QTBUG-95277 HTTP2: QNetworkReply::encrypted not emitted  
+* QTBUG-95293 QCocoaAccessibilityElement incorrect selector for  
+"enabled": should be isAccessibilityEnabled not  
+accessibilityEnabledAttribute  
+* QTBUG-91459 When using Speech Recognition on a multiple monitor setup  
+telling it to click a button does not always work on the secondary  
+monitor  
+* QTBUG-95239 Massive memory consumption when rendering small svg  
+* QTBUG-83182 QFutureWatcher resultsReadyAt may report rubbish  
+* QTBUG-77656 Crash when waking up with multiple displays in clamshell  
+mode  
+* QTBUG-94790 moc fails to parse include inside enum  
+* QTBUG-95429 Expired certificates in tst_QSslCertificate  
+* QTBUG-95351 In the help pages: A fromVector() example is not right  
+* QTBUG-95071 mysql client version detection broken with MariaDB 10.6  
+* QTBUG-56595 QXcbConnection::getTimestamp() returns old timestamp  
+* QTBUG-95631 Stylesheet issue when try to change background color with  
+a editable combobox on hover  
+* QTBUG-95619 [Mac] Memory leak in  
+QNSWindow::applicationActivationChanged  
+* QTBUG-69515 Linux, WindowStaysOnTopHint does not work.  
+* QTBUG-85529 Polytonic Greek characters cannot be composed both ways  
+* QTBUG-94990 REG: 5.15.4->5.15.5: When a window is switched to be  
+FullScreen then it will end up keeping a bar at the bottom of the window  
+which should not be visible  
+* QTBUG-87863 CMake configuration fails with multiple calls to  
+find_package(Qt)  
+* QTBUG-87813 WASM: App sometimes crashes on aborting NetworkRequest  
+* QTBUG-2390 Generated .la files are not correct for frameworks  
+* QTBUG-92477 Memory leak in QFontDatabase  
+* QTBUG-83419 Q2-2020 Flaky failing autotest function remainingTime in  
+qtimer  
+* QTBUG-58519 tst_QTimer::remainingTime() 'qAbs(remainingTime - 150) <  
+50' returned FALSE on Windows and OS X  
+* QTBUG-81504 QWaylandWindow::handleUpdate creates thousands of pending  
+frame callbacks, causing wayland connection termination  
+* QTBUG-73990 Context Menu Items Fonts and Hotkeys Not Displaying  
+* QTBUG-91713 QtBase benchmarks fail for qtimezone, qdiriterator, and  
+qfile  
+* QTBUG-95050 [REG: 5.2->5.14] Locale used by  
+QString::localeAwareCompare() no longer changeable  
+* QTBUG-80957 QFutureInterface: reportResults with an empty vector  
+breaks results  
+* QTBUG-85839 Documentation: wrong default value for Layout Direction  
+* QTBUG-88248 QObject orphaned connections soft-leak  
+* QTBUG-87774 QToolBar::clear() leaks memory  
+* QTBUG-95314 WASM: Diverging timezones in C++/QML  
+* QTBUG-71590 Qt is using "Non-SDK" interfaces, will be blocked by  
+Android  
+* QTBUG-94215 [Reg 5.15.2->5.15.3/6] QString::lastIndexOf is broken  
+  
+### qtsvg  
+* QTBUG-94878 QSvgRenderer crash  
+* QTBUG-92184 QtSVG cannot understand minified SVGs if they contain arcs  
+  
+### qtdeclarative  
+* QTBUG-93857 Mac Link Accessibility, Link cannot be triggered by  
+VoiceOver  
+* QTBUG-89736 focusable item becomes impossible to focus after  
+reparenting to a newly loaded item  
+* QTBUG-94223 Regression[5.14->5.15] 'model' is no longer an implicit  
+data role in delegates in Custom delegate  
+* QTBUG-75553 QML Canvas, reset line dash failed  
+* QTBUG-89375 No C++ documentation for containmentMask  
+* QTBUG-93880 MultiPointHandlers (DragHandler, PinchHandler) don't emit  
+the grabChanged signal  
+* QTBUG-78258 DragHandler's grab permission CanTakeOverFromAnything does  
+not respect keep grab  
+* QTBUG-79163 DragHandler steals events from a MouseArea with  
+preventStealing = true  
+* QTBUG-94622 svg Image is  Pixelated when windows is scaled  
+* QTBUG-94844 Rendering errors with ShaderEffect after hiding and  
+reshowing a window  
+* QTBUG-95417 Regression 5.15.4: gc() within generator functions crash  
+* QTBUG-94820 Crash when declaring an alias to a readonly object-typed  
+subproperty  
+* QTBUG-89822 Error with readonly alias property  
+* QTBUG-95314 WASM: Diverging timezones in C++/QML  
+* QTBUG-95825 Live preview not starting  
+* QTBUG-76310 Dragging (QDrag) triggered by touch event requires an  
+additional press to move drag target  
+* QTBUG-94798 crash in QQuickDesignerSupport with gcc at ubuntu  
+* QTBUG-93973 Races in QJSEngine()  
+* QTBUG-75862 FocusReason is broken in Controls 2  
+* QTBUG-94928 loop QQuickDesignerSupport with simple example  
+  
+### qttools  
+* QTBUG-74353 Qt Assistant doesn't take stylesheet into account with  
+search result view  
+* QTBUG-91082 [REG: 5.12->5.13] Assistant does not support custom  
+filters anymore  
+* QTBUG-95561 Typo in the "Introduction To QDoc" manual page.  
+* QTBUG-87677 windeployqt locates a release version of icudtXX.dll for a  
+debug binary  
+  
+### qtlocation  
+* QTBUG-95221 QGeoCoordinate::toString() sometimes return wrong values  
+  
+### qtconnectivity  
+* QTBUG-90760 BT discovery stopped working after moving to Qt 5.15.2  
+* QTBUG-90369 Heart-rate crashes during its use  
+* QTBUG-95156 Crash when discovery Bluetooth LE device on Windows with  
+Bluetooth off  
+* QTBUG-95349 Typo in Bluetooth Low Energy Overview documentation  
+  
+### qtwayland  
+* QTBUG-91264 ASSERT on shutdown in Qt Wayland  
+* QTBUG-90037 Crash when hiding QtQuick window with wayland/EGL  
+* QTBUG-92249 quick3d examples crashes or hangs on exit on wayland  
+* QTBUG-94602 Releasing wayland buffer from Qt compositor side  
+  
+### qt3d  
+* QTBUG-93035 Adding a disable entity to the scene and enabling it later  
+isn't properly picked up  
+  
+### qtwebsockets  
+* QTBUG-87279 [REG: 5.13.2-5.14.0] When interacting with a webpage that  
+will trigger a signal via QWebChannel then if the slot is still running  
+it can cause it to resend the same message rather than a new one  
+  
+### qtwebengine  
+* QTBUG-93082 [REG 5.15.3 -> 5.15.4] qtwebengine: touchpad scroll is  
+broken in wayland  
+  
+### qtquickcontrols2  
+* QTBUG-83630 Qt Quick Control 2 Tooltip can be way too big when you  
+have newlines  
+* QTBUG-55705 SwipeDelegate is not swiping inside SwipeView  
+* QTBUG-94307 ComboBox: without a validator bindings to acceptableInput  
+don't work  
+* QTBUG-77946 tst_QQuickDrawer::Universal::position(right) failed on  
+Linux openSUSE_15_0 (gcc-x86_64)  
+* QTBUG-87708 [Reg 5.15.0 -> 5.15.1] header's width isn't resized to  
+window's width when Layout is used  
+* QTBUG-94764 REG: Attached ToolTips shrink  
+  
+### qtcharts  
+* QTBUG-94469 Doc: Wrong return type for QValueAxis::labelFormat qml  
+property  
+* QTBUG-94998 5.15.4 -> 5.15.5, some labels disappeared from axes  
+* QTBUG-79218 When zooming out enough then the labels on the axes will  
+end up showing drawing errors  
+  
+### qtdatavis3d  
+* QTBUG-80194 Q3DScatter Memory Leak  
+* QTBUG-90371 The labels for the bars are not displayed when property  
+"Rotate horizontally" set max to the right  
+  
+### qtvirtualkeyboard  
+* QTBUG-94259 High CPU load on embedded targets caused by timers  
+* QTBUG-94560 The first item of selection list sometimes get highlight  
+* QTBUG-94017 Cursor position moves when un-converted Japanese is  
+deleted  
+* QTBUG-68412 tst_plugin::test_pinyinInputMethod crashes on arm  
+* QTBUG-94715 Qt Virtualkeyboards support for Chinese language doesn't  
+work properly  
+* QTBUG-95664 VirtualKeyboardSettings: Readonly property is not marked  
+as such  
+  
+### qtremoteobjects  
+* QTBUG-94570 QEventDispatcherWin32::registerTimer: Failed to create a  
+timer  
+  
+### qtquicktimeline  
+* QDS-3216 Flickering when using default value as implcit first keyframe  
+  
+### qtquick3d  
+* QTBUG-91495 When importing a .fbx file it will end up not placing some  
+elements correct and some angle/positions of components are also wrong  
+  
+### qtcoap  
+* QTBUG-94763 [CoAP] When resource is observed the QT CoAP client sends  
+an acknowledgement packet which is not empty.  
+  
+Known Issues  
+------------  
+  
+The RTA (release test automation) reported issues in Qt 5.15.x:  
+https://bugreports.qt.io/issues/?filter=21874  
+  
+Credits for the  release goes to:  
+---------------------------------  
+  
+Eirik Aavitsland  
+Laszlo Agocs  
+Jim Albamont  
+Dimitrios Apostolou  
+Eskil Abrahamsen Blomfeldt  
+Joerg Bornemann  
+Assam Boudjelthia  
+Andreas Buhr  
+Albert Astals Cid  
+Mitch Curtis  
+Giuseppe D'Angelo  
+Oliver Eftevaag  
+Alexandros Frantzis  
+Samuel Gaist  
+Pekka Gehör  
+Maximilian Goldstein  
+Henning Gruendl  
+Richard Moe Gustavsen  
+Tang Haixiang  
+Heikki Halmet  
+Sean Harmer  
+Thomas Hartmann  
+Ulf Hermann  
+Øystein Heskestad  
+Volker Hilsheimer  
+Dominik Holland  
+Allan Sandfeld Jensen  
+Tim Jenssen  
+Jeremy Katz  
+Friedemann Kleint  
+Jarek Kobus  
+Sze Howe Koh  
+Jarkko Koivikko  
+Fabian Kosmale  
+Mike Krus  
+Sona Kurazyan  
+Igor Kushnir  
+Kai Köhne  
+Inho Lee  
+Paul Lemire  
+Robert Löhning  
+Thiago Macieira  
+Marc Mutz  
+Yuya Nishihara  
+Mårten Nordheim  
+Gatis Paeglis  
+Jukka Passi  
+Timur Pocheptsov  
+Aleix Pol  
+Lorn Potter  
+Liang Qi  
+Topi Reinio  
+André de la Rocha  
+Fan RuiJie  
+Shawn Rutledge  
+Lars Schmertmann  
+Luca Di Sera  
+Andy Shaw  
+Ivan Solovev  
+Brett Stottlemyer  
+Tarja Sundqvist  
+Tasuku Suzuki  
+Jan Arve Sæther  
+Morten Johan Sørvig  
+Ivan Tkachenko  
+Jens Trillmann  
+Sami Varanka  
+Nico Vertriest  
+Tor Arne Vestbø  
+Edward Welbourne  
+Paul Wicking  
+Oliver Wolff  
+JiDe Zhang