Release note

Qt 5.15.12 release is a patch release made on the top of Qt 5.15.11. As a patch
release, Qt 5.15.12 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

25be15e7d7 Update bundled libpng to version 1.6.38
libpng was updated to version 1.6.38
9374d96406 Update bundled zlib to version 1.2.13
zlib was updated to version 1.2.13.
59845d680c Update bundled libpng to version 1.6.39
libpng was updated to version 1.6.39
e48e2ed9d7 macOS: Fix less common writing systems on Catalina and
later
Fixed missing text with certain writing systems on macOS Catalina and
later.

Fixes

qtbase

QTBUG-92199 [REG] The color of QLineEdit and QPlainTextEdit
placeholder text is not grayed-out if stylesheet was applied
QTBUG-93009 QPalette::PlaceholderText color is not followed after
setting color in a style sheet
QTBUG-104917 QStyleSheetStyle::drawPrimitive(QStyle::PE_PanelLineEdit)
crashes with widget==nullptr
QTBUG-107263 QVector::toList() example mistake
QTBUG-107038 Non-aliased Text is rendered incorrectly using
NativeRendering
QTBUG-107719 Typo in the document?
QTBUG-79977 QMessageBox does not work at IOS 13
QTBUG-85773 QML TextEdit copy() copies text twice on Android
QTBUG-47979 QDesktopServices is unable to open a file on Android
QTBUG-103852 QDir fails for paths of length over 260 characters
QTBUG-106713 android.bundle.enableUncompressedNativeLibs=false
deprecated in Android Gradle plug-in ver 8.0
QTBUG-104085 QJsonValue::toObject(const QJsonObject &defaultValue) and
QJsonValue::toArray(const QJsonArray &defaultValue) parse empty default
values incorrectly
QTBUG-104930 QLocale shows German text for "en_DE"
QTBUG-107673 [REG]Blank button box on MacOS
QTBUG-108103 QHostAddress::isEqual() with IPv6 determines valid ip to
be any
QTBUG-46681 [REG 4.x->5.x] QPainter in paintEvent() doesn't work with
Qt::WA_PaintOnScreen
QTBUG-100085 xcb: Native window does not get paint event if another
window on top of it is hidden unless there is a enter/leave event
somewhere
QTBUG-108186 Crash in qt_memrotate90 or qt_memrotate270
QTBUG-67579 QT5 apps running natively under Wayland do not respect
cursor size setting
QTBUG-87778 wayland: cursor size wrong
QTBUG-96384 Tagalog cannot be displayed correctly
QTBUG-98920 Font fallback is not working properly on macOS
QTBUG-108662 Can't build for Android
QTBUG-90611 Shortcut Alt+` is not working with non US layout
QTBUG-101680 MySQL plugin: QSqlQuery::prepare + exec no results when
table contains JSON type
QTBUG-41170 [Android]: When the window resizes then there it will
cause flicker
QTBUG-85248 Qt warning
"QHttpNetworkConnectionPrivate::_q_hostLookupFinished could not de-queue
request, failed to report HostNotFoundError"
QTBUG-91882 eglfs with a cloned screen cause app to flicker
QTBUG-106896 QDir::drive() does not shows DVD drive
QTBUG-98988 Qt bugs when portal implementation is not available
QTBUG-87137 tst_QApplication::sendEventsOnProcessEvents() failed on
Ubuntu 20.04/22.04 and RHEL 9
QTBUG-107604 [Reg 5.15.10 -> 5.15.11] Incorrect fullscreen dimensions
on some Android devices
QTBUG-107709 Android screen size mismatch [Reg 5.15.10 -> 5.15.11]
QTBUG-107523 [REG 5.15.10 -> 5.15.11] Android edge-to-edge layout
broken
QTBUG-108556 FAIL! : tst_QTimer::zeroTimer in Ubuntu 20.04 and SLES
15.4
QTBUG-107727 QSystemTrayIcon does not emit the
QSystemTrayIcon::activated signal on Ubuntu 20.04/22.04 for left click
and right click.
QTBUG-91255 [Android] Add support for APK Signature Scheme v2
QTBUG-109022 FAIL! : tst_QFtp::initTestCase in Ubuntu_20_04

qtdeclarative

QTBUG-106864 Reg-5.15.9->5.15.10: Android crash on startup on armv7
(32bit) devices
QTBUG-106269 Qt Quick apps immediately crash under Android 6
QTBUG-107255 [Android 5.15.11] module "QtGraphicalEffects" is not
installed
QTBUG-107038 Non-aliased Text is rendered incorrectly using
NativeRendering
QTBUG-106645 "TypeError: Cannot read property of null" error in "QML
Dynamic View Ordering Tutorial 1" example
QTBUG-107795 Reg-5.15.10->5.15.11 Setting property on TextField
crashes
QTBUG-106457 Assert on invalid code
QTBUG-102793 [REG: 5.13->5.14] Bindings in delegates get triggered
multiple times if delegate and/or model is changed
QTBUG-107732 Tumbler sometimes ignores specified index
QTBUG-107774 madvise() terminates application due to EBADF code
QTBUG-108298 Crash using ConicalGradient in a ShapePath
QTBUG-106875 Segfault when Loader is trying to load a file that
contains the Loader
QTBUG-109002 [PinchHandler] Dragging a target is not functional
QTBUG-108258 FAIL! : tst_qquickbehaviors::currentValue in MacOS_12
QTBUG-106520 FAIL! :
qtquickcontrols::Tests_StackLayout::test_addAndRemoveItems in
Ubuntu_20_04
QTBUG-106521 FAIL! :
qtquickcontrols::Tests_StackLayout::test_addAndRemoveItems in MacOS_12
QTBUG-108880 FAIL! : tst_qquickanimations::reparent in MacOS_12
QTBUG-107619 V4: Memory corruption due to unchecked length usage

qtmultimedia

QTBUG-105381 Qt Multimedia fails to read crop info from a HEVC video
stream's VPS.
QTBUG-106059 Ended video shows does not follow VideoOutput size
changes
QTBUG-76205 WMF: When playing videos of a certain MP4 type then
occasionally it will only show the main color and not the whole video
QTBUG-96746 Switching between external camera and built-in webcam
flips the VideoOutput 180 degrees
QTBUG-108018 Camera Example crashes on macOS 13 ventura

qtdoc

QTBUG-107245 Typo in the document?

qtlocation

QTBUG-107580 [REG 5.15.10 -> 5.15.11], PositionSource: last known
position is never read
QTBUG-103478 QGeoPositionInfoSource on Android always asks for
location permission

qtwayland

QTBUG-104259 tst_seatv4 tests are failing with Ubuntu 22.04 Wayland
QTBUG-103378 Some return values are ignored, causing warnings
QTBUG-107076 Copying image data from Qt aplications is still broken on
GNOME Wayland
QTBUG-75919 Override cursor has no precedence on Wayland

qt3d

QTBUG-105376 Qt Quick Text gets correupted when a Qt3D ShaderProgram's
shader loads multipule textures
QTBUG-56368 Crash when using async NodeInstantiator within Scene3D
QTBUG-108918 FAIL! : tst_RayCasting::shouldReturnAllResults in
Ubuntu_20_04

qtimageformats

QTBUG-107040 Tiff images with LZW compression do not work in debug
builds
QTBUG-107223 Massive memory consumption when loading TIFF image

qtquickcontrols

QTBUG-106520 FAIL! :
qtquickcontrols::Tests_StackLayout::test_addAndRemoveItems in
Ubuntu_20_04
QTBUG-106521 FAIL! :
qtquickcontrols::Tests_StackLayout::test_addAndRemoveItems in MacOS_12

qtwebengine

QTBUG-108207 Mac: errors building Qt 6.3.2 with Xcode 14.1

qtvirtualkeyboard

QTBUG-98750 [VKB] AutoScroller does not work in the basic virtual
keyboard example
QTBUG-83217 rotation of virtualkeyboard does not work
QTBUG-105371 [Virtual keyboard] The fallback to layouts/fallback is
not mentioned

qtscxml

QTBUG-80262 SCXML StateMachine state properties get incorrect values
if History is used

qtquick3d

QTBUG-97680 Reloading View3D will lead memory leak in 5.15

qtmqtt

QTBUG-92817 QMqttTopicFilter also matches topics just starting with
the filter name

qtopcua

QTBUG-104646 [C++20 FTBFS] open62541.h is running afoul of volatile
compound statement deprecation in C++20

Known Issues

Check that your system meets Qt's requirements:
https://doc.qt.io/qt-5.15/supported-platforms.html
The RTA (release test automation) reported issues in Qt 5.15.x:
https://bugreports.qt.io/issues/?filter=21874
Qt 5.15.12 Open issues in Jira:
https://bugreports.qt.io/issues/?filter=24555

Credits for the release goes to:

Eirik Aavitsland
Laszlo Agocs
Eskil Abrahamsen Blomfeldt
Assam Boudjelthia
Michael Brüning
Andrey Butirsky
Artem Dyomin
Alexey Edelev
Christian Ehrlicher
Hatem ElKharashy
Ilya Fedin
Jan Grulich
Heikki Halmet
Ulf Hermann
Dominik Holland
Janne Juntunen
Maurice Kalinowski
Jonas Karlsson
Timothée Keller
Fabian Kosmale
Kai Köhne
Inho Lee
Paul Lemire
Thiago Macieira
Ievgenii Meshcheriakov
Samuel Mira
Marc Mutz
Mårten Nordheim
Dennis Oberst
Timur Pocheptsov
Liang Qi
André de la Rocha
Shawn Rutledge
Ivan Solovev
Axel Spoerl
Christian Strømme
Tarja Sundqvist
Jan Arve Sæther
Sami Varanka
Doris Verria
Ville Voutilainen
Juha Vuolle
Ole Wegen
Edward Welbourne
Paul Wicking
Vlad Zahorodnii