https://bugs.kde.org/show_bug.cgi?id=434557
Bug ID: 434557
Summary: KXMessages::broadcastMessageX triggers deprecated
QByteArray behavior
Product: frameworks-kwindowsystem
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: nicolas.fe...@gmx.de
Target Milestone: ---
SUMMARY
In
https://invent.kde.org/frameworks/kwindowsystem/-/blob/master/src/platforms/xcb/kxmessages.cpp#L331
msg can be accesses out of bounds (due to the pos <= len above). In Qt5 this
causes a nullbyte to be read, but that behavior is deprecated
(https://doc.qt.io/qt-5/qbytearray.html#operator-5b-5d), causing a runtime
warning: Using QByteRef with an index pointing outside the valid range of a
QByteArray. The corresponding behavior is deprecated, and will be changed in a
future version of Qt
In Qt6 this results in an assert
STEPS TO REPRODUCE
1. Run kxmessages_unittest against Qt6 or put Q_ASSERT(i+pos < msg.length()) in
the code
OBSERVED RESULT
An assert triggers
EXPECTED RESULT
No assert
SOFTWARE/OS VERSIONS
KDE Frameworks Version: master
Qt Version: Current dev or 5.15 + manual assert
--
You are receiving this mail because:
You are watching all bug changes.
