Hi Thorsten! On Sun, Aug 07, 2022 at 10:37:45PM +0200, Thorsten Glaser wrote: > Package: libqt5gui5 > Version: 5.15.2+dfsg-9 > Severity: normal > X-Debbugs-Cc: t...@mirbsd.de > > Running a Qt application (musescore3) against Valgrind shows: > > ==27770== Conditional jump or move depends on uninitialised value(s) > ==27770== at 0x7470A2E: __vfprintf_internal (vfprintf-internal.c:1687) > ==27770== by 0x74839C5: __vsnprintf_internal (vsnprintf.c:114) > ==27770== by 0x7511D30: __snprintf_chk (snprintf_chk.c:38) > ==27770== by 0xB50DA79: ??? (in > /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > ==27770== by 0xB50F232: ??? (in > /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > ==27770== by 0xB50FC92: ??? (in > /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > ==27770== by 0xB50A403: > QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char > const*) (in /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > ==27770== by 0xB50D112: QXcbIntegration::QXcbIntegration(QStringList > const&, int&, char**) (in /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > ==27770== by 0x485346E: ??? (in > /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so) > ==27770== by 0x67438FB: > QGuiApplicationPrivate::createPlatformIntegration() (in > /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.2) > ==27770== by 0x6744D4F: QGuiApplicationPrivate::createEventDispatcher() > (in /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.2) > ==27770== by 0x6F86A55: QCoreApplicationPrivate::init() (in > /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.15.2) > ==27770== Uninitialised value was created by a stack allocation > ==27770== at 0xB50E7A0: ??? (in > /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5.15.2) > > I don’t always see this. In this example, $DISPLAY points to Xtightvnc > from tightvncserver (= 1:1.3.10-3).
Does it still happen with the latest version of Qt (5.15.6)? If yes, can you please install libqt5gui5-dbgsym and generate a new stacktrace? -- Dmitry Shachnev
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