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Qt 5.12.10 is a bug-fix release. It maintains both forward and backward
compatibility (source and binary) with Qt 5.12.9.
For more details, refer to the online documentation included in this
distribution. The documentation is also available online:
https://doc.qt.io/qt-5.12/index.html
The Qt version 5.12 series is binary compatible with the 5.11.x series.
Applications compiled for 5.11 will continue to run with 5.12.
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.
****************************************************************************
* Important Behavior Changes *
****************************************************************************
****************************************************************************
* Library *
****************************************************************************
- [oss-fuzz-24347] QXmlStreamReader: No longer resizes readBuffer to a size
it already has. When resizing it to 0 it will cause it to allocate memory.
This will then cause append() to copy the data from the other string instead
of using copy on write.
- [oss-fuzz-24702] QTextHtmlParserNode: Fixed an integer-overflow in variantHash() due
to extreme values for the font's pixelsize.
- [QTBUG-86702] Gif decoder: fixed a read error caused by a ub check
The recently added check to avoid negative-bitshift ub ignored that
the algorithm will sometimes use a negative bitcount value as a flag.
This caused a reading failure for some frames.
- [QTBUG-86547] Fixed a double deletion in QDomAttr::setNodeValue()
- [QTBUG-86691] xpm handler: fixed read error caused by off-by-one in overflow check
The recently introduced overflow check for 8 bit images was too
aggressive, causing the last pixel on each line to be rejected. This is also
fixed for 32bit images.
- [oss-fuzz-22997] Avoided a potential ub in a corrupt bmp file
- [QTBUG-85725] Cocoa: Translated the buttons used for the native font and
color dialogs
- [QTBUG-86019] Fixed crash when serializing default-constructed QTimeZone
- [oss-fuzz-24273] QBezier: No longer calculates a unit vector when length is null to
prevent a divide by zero.
- [QTBUG-81723] xcb: Fixed flushing of native subwindows when not using shared memory
When using X-forwarding shared memory is not used for the backing
store image, and ended up in a code path where we first copied the updated
parts of the backing store from our client side image over to the
server, and then flush those parts from the server-side image to the
window.
- [QTBUG-85764] Fixed starting of iOS applications on Big Sur
- [QTBUG-85580] QByteArray::toDouble: fixed buffer overflow reads on fromRawData()
- [QTBUG-85193] Allowed smooth curve stroking for very wide lines to ensure they
are rendered better.
- [QTBUG-85915] macOS: Fixed crash when re-using the backing store for a
re-created QWindow. This was triggered when reopening a QComboBox after
switching from one screen to another.
- [oss-fuzz-23220] Sanitized the lengthValue in CSS parser by limiting the
LengthData to the integer range before rounding it, taking into account
that qRound() substracts 1 from negative values.
- [oss-fuzz-21860] Checked return values of hex2int in get_hex_rgb
- [oss-fuzz-23988] Fixed buffer overflow
- [oss-fuzz-23735] Multiplied instead of shifting for negative values
- [QTBUG-85528] Disabled PCRE2 JIT on macOS ARM64
- [QTBUG-85279] macOS: Excluded 32-bit builds by checking pointer size
- [QTBUG-85279] Fixed compilation of Qt on Apple Silicon (arm64)
- [QTBUG-76924] Prevented the setting of focus on a proxy widget that does
not take focus
- [QTBUG-71548] Worked around a regression in the MSVC 2019 6.6 STL triggered
when building qttranslations.
- [QTBUG-84383] Fixed UITouch event handling on tvOS to prevent a crash
when touchesEnd: could be called with touches that were not included in
touchesBegain:.
- [QTBUG-84762] macOS: Ensured QCocoaGLContext cleans up more often to
release unneeded NSViews
- [QTBUG-77320] Android: Accessibility is now activated when appropriate
- [QTCREATORBUG-24195] Now always shows a submenu on its parent menu's screen
QCosmeticStroker
----------------
- [oss-fuzz-25243] Avoided a heap-buffer-overflow
QOutlineMapper
--------------
- [oss-fuzz-24615] Avoided a heap-buffer-overflow
QtSQL
-----
- sqlite was updated to version 3.33.0
Third-Party Code
----------------
- Fix aggregated copyright information of TinyCBOR component to reflect the
years in the individual source files. Note that this is not same as the
Copyright year in the upstream MIT license text.
- Changed classification of the wintab license from "Custom" to
"LCS-Telegraphics License"
- libjpeg-turbo was updated to version 2.0.5
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