Release note

Qt 5.15.4 release is a patch release made on the top of Qt 5.15.3. As a patch
release, Qt 5.15.4 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

cb1eed0989 Update bundled libjpeg-turbo to version 2.0.6
libjpeg-turbo was updated to version 2.0.6
8e6489f5eb Support family names that end/start with space
Fixed matching against fonts which has a family name that ends or
starts with a space.
dde0c0a45c SQLite: Update to 3.35.2
Updated SQLite to v3.35.2
107d14825a Disable Harfbuzz/CoreText hotfix on older macOS/iOS
versions
Fixed a regression when combining letter spacing with the default font
on macOS 10.15 and lower or iOS 13 or lower.
8f2959c345 QTextHtmlParserNode: Limit colspan to avoid segfault
QTextDocument::setHtml: column spans are limited to 20480, an
arbitrarily high but reasonable value.

qtwayland

560d8a3b Fix race condition when attaching client to text input
Fixed a problem where a virtual keyboard would not be updated correctly
if two clients were started at almost the same time.

qtimageformats

f67ef5b Update bundled libwebp to version 1.2.0
Update bundled libwebp to version 1.2.0
f98953f Update bundled libtiff to version 4.2.0
Bundled libtiff was updated to version 4.2.0

qtserialbus

17ac276 Fix Modbus custom command size calculation
Fix Modbus TCP custom command size calculation.
4e7a1e8 Fix Modbus custom command response processing
Fix Modbus custom command response processing.

Fixes

qtbase

QTBUG-89889 tst_QDateTime::systemTimeZoneChange fails on 32bit systems
QTBUG-88543 QDateTime::fromString does not accept Qt::TextDate format
from toString() in Vietnamese locale
QTBUG-32778 Documentation colors conflicting with system theme make
text unreadable
QTBUG-87871 QMdiSubWindow's window icon size is incorrect for system
scaling 150% or more
QTBUG-83632 In top level frameless window Qt.CrossCursor does not
comes in effect
QTBUG-83295 QLineEdit::editingFinished() not emitted when pressing the
clear button and moving focus away
QTBUG-90949 UI rendering and interaction dead lock when used as an
window embedded application
QTBUG-91401 Error loading PNG: Unsupported ICC profile class 70727472
QTBUG-87078 xcb: showMaximized() in full screen only restores the
window with some WMs
QTBUG-91532 tst_QMenu::QTBUG_89082_actionTipsHide() failing on Windows
QTBUG-63275 Android QScreen::grabWindow(0) & sample code
Screenshot::shootScreen() fails on Android
QTBUG-72231 WASM: DropShadow leads to misrendering in other places
QTBUG-89366 [REG 5.15] Style Sheet text-align: bottom
QTBUG-91735 qstylesheetstyle.cpp position() pointer is accessed before
checking hasPosition()
QTBUG-86857 QPushButton style "text-align: bottom" not working in Qt
5.15.1
QTBUG-91073 Android: cursor movement in TextEdit is not tracked, so
it can go behind the soft-keyboard
QTBUG-91539 QThread::quit() is unreliable on Windows
QTBUG-91455 Qt.ImhFormattedNumbersOnly flag does not show minus sign
in iOS keyboard
QTBUG-91909 QtConcurrenceThreadEngine > ThreadEngineStarter?
QTBUG-90568 package (rpcs3) fails to build when QT(qtconcurrent) was
built with gcc-11
QTBUG-91764 [REG 5.15.2->5.15.3]: When specifing a letterSpacing for
the default font, it will end up displaying incorrect characters
QTBUG-87326 Removal of "old time-zone lookup fallbacks" breaks TZ
handling on Gentoo
QTBUG-92046 Description of Julian calendar is wrong
QTBUG-92173 [iOS]: Crash occurs when showing a new QQuickWindow after
the first one is deleted
QTBUG-66448 Android KEYCODE_MEDIA_PLAY_PAUSE is incorrectly translated
to Qt.Key_MediaPlay in QML
QTBUG-90396 QFontDialog highlights default value for the font style
list
QTBUG-86134 [Reg 5.9 -> 5.12] QPushButton: icon not aligned when menu-
indicator is removed
QTBUG-90250 QPushButton: menu indicator with stylesheet not drawn
correctly
QTBUG-92178 Editable Tree Model fails QAbstractItemModelTester
QTBUG-92275 Slow and memory intensive handling of input to
QDateTime::fromString
QTBUG-91223 qt_memrotate270, qt_memrotate180 , qt_memrotate90,
segfaults
QTBUG-88031 iOS: quickcontrols2/gallery fails to build in release mode
(Failed to parse qmlimportscanner output)
QTBUG-92490 Stylesheet with pseudo state on QPlainTextEdit
QTBUG-89735 MultiPointTouchArea delays release on three finger tap
QTBUG-90699 tst_QApplication::focusWidget() and focusMouseClick()
failed on macos 10.15 in CI
QTBUG-91261 Invalid pointer return with QGridLayout::itemAt(-1)
QTBUG-91029 Windows/Accessibility: Focused QListWidget is not
announced by screen readers
QTBUG-91788 Assert when removing a model from
QConcatenateTablesProxyModel that is bound to a QSortFilterProxyModel
QTBUG-92220 QAbstractItemModelTester false positive
QTBUG-92040 [macOS] Labs platform context menu items are disabled on
modal window
QTBUG-95429 Expired certificates in tst_QSslCertificate
QTBUG-56552 QDateTime/QTime truncates milliseconds when converting to
Qt::ISODate string
QTBUG-82617 Crash on exit via back button on Huawei Mate 20 Pro
QTBUG-85449 Crashes at the destructors of std::thread and std::mutex.
QTBUG-83043 Crash in libqtforandroid.so
QTBUG-91253 QConcatenateTablesProxyModel crushes being sourceModel in
QSortFilterProxyModel
QTBUG-79140 [REG 5.13.0 -> 5.14.0]OTF fonts don't work correctly
QTBUG-89050 there seems to be no way to search backwards in
QStringView with QRegularExpression
QTBUG-84258 tst_Gestures::graphicsItemGesture fails
QTBUG-91385 Cannot run pdf examples on iOS

qtsvg

QTBUG-91507 Out of bounds read in function
QRadialFetchSimd<QSimdSse2>::fetch when input craft svg file
QTBUG-90744 [REG: 5.13 -> 5.14] QPixmap::load returns false for svg
files if file encoding not utf-8 & format not specified

qtdeclarative

QTBUG-91196 Locale QML documetnation lists misspelled property
QTBUG-90239 TextField with regex clears text if unmatched char is
typed
QTBUG-91519 [REG 5.14.2 -> 5.15.0] Call QQmlIncubator::clear() inside
QQmlIncubator::setInitialState() crashes afterward
QTBUG-91491 Crash in Generator::method_next when creating new
properties on Generator
QTBUG-90362 The first character in text input fields appears last on
Android 10/11
QTBUG-87197 MouseArea containsMouse value incorrect after visibility
changes
QTBUG-92076 TableView: forceLayout() fails when all columns are hidden
QTBUG-92099 TableView: content height doesn't change when adding new
rows
QTBUG-90740 Quick test: inline components within components passed to
createTemporaryObject cause crash
QTBUG-90762 QuickTest: List testcases when testcase is inline
component
QTBUG-92236 When the cache for a QML file is generated and then loaded
it will cause a crash
QTBUG-92036 Visual ordering flips when QSGRenderNode is used with
DepthAwareRendering
QTBUG-89892 crash when assigning null to anchors.horizontalCenter
QTBUG-91749 Incorrect batching using overlapping QSGGeometry with
lines having a width > 1
QTBUG-91867 TextInput cursorDelegate position not updated after left
padding change
QTBUG-46350 Crash when deleting item currently set in PropertyChanges
target
QTBUG-91276 DelegateModel can crash with retranslate()
QTBUG-41867 disabled particle Emitter still causes QSG renderer
uploads
QTBUG-86708 When using DelegateModelGroup to group items then when a
created item which is set to not be included will trigger an assert

qtactiveqt

QTBUG-92237 Document the qaxserver_no_register configuration

qtmultimedia

QTBUG-51064 QML Video type doesn't work with core profile
QTBUG-62694 Setting default surface format with 3.2 core profile
breaks video decoding with a custom QAbstractVideoSurface on macOS

qttools

QTBUG-91754 qdoc crash when generic documents of qtbase

qtdoc

QTBUG-86614 When a service is set to be started at boot time it is not
being started after a reboot of the device
QTBUG-92388 Documentation page on rcc is freaking out

qtwayland

QTBUG-86177 Some subsurfaces change but are never committed
QTBUG-91096 >1 Programs on QtWayland causes QtVirtualKeyboard to not
work
QTBUG-89680 Touch is ignored if up and down arrives in the same
wl_touch.frame

qtserialbus

QTBUG-62192 MODBUS custom command doesn't work
QTBUG-91037 MODBUS custom command doesn't work

qtquickcontrols2

QTBUG-61021 Autocomplete of editable ComboBox not working on Android
QTBUG-87236 NinePatchImage causes crash due to repeated presses.
QTBUG-88162 Crash when NinePatchImage's source is changed

qtdatavis3d

PYSIDE-1438 Using QBar3DSeries.dataProvider().addRow() segfaults

qtremoteobjects

QTBUG-91229 tst_Server_Process::testRun fails with macOS 10.15
QTBUG-82284 TestModelView::testDataInsertionTree fails for Windows 7
QTBUG-84640 Disconnected ExternalIODevice Not Handled

Known Issues

Credits for the release goes to:

Eirik Aavitsland
Laszlo Agocs
Nikolay Avtomonov
Alex Blasche
Eskil Abrahamsen Blomfeldt
Assam Boudjelthia
Michael Brasser
Andreas Buhr
Wang Chuan
Giuseppe D'Angelo
Alexey Edelev
David Edmundson
Oliver Eftevaag
Christian Ehrlicher
David Faure
Samuel Gaist
Pablo Luis Garcia
Maximilian Goldstein
Jan Grulich
Richard Moe Gustavsen
Heikki Halmet
Andreas Hartmetz
Jani Heikkinen
Karsten Heimrich
Ulf Hermann
Volker Hilsheimer
Allan Sandfeld Jensen
Christoph Keller
Hyunkook Khang
Friedemann Kleint
Michal Klocek
Sze Howe Koh
Fabian Kosmale
Sona Kurazyan
Kai Köhne
Paul Lemire
Robert Löhning
Piotr Mikolajczyk
Bartlomiej Moskal
Mårten Nordheim
Pasi Petäjäjärvi
Timur Pocheptsov
Joni Poikelin
Aleix Pol
Lorn Potter
Liang Qi
Topi Reinio
Andre de la Rocha
Dong Rui
Shawn Rutledge
Siyeon Seo
Dmitry Shachnev
Nick Shaforostov
Andy Shaw
Brett Stottlemyer
Tarja Sundqvist
Jan Arve Sæther
Morten Johan Sørvig
Alex Trotsenko
Tuomas Vaarala
Doris Verria
Tor Arne Vestbø
Alexander Volkov
Ville Voutilainen
Edward Welbourne
Paul Wicking
Weng Xuetian
Zhang Yu
JiDe Zhang