https://bugs.kde.org/show_bug.cgi?id=503464
--- Comment #8 from Ming Chuan <m...@culpring.com> --- (In reply to Ming Chuan from comment #7) > I got another segfault crash related to tablet event processing, this time > stack trace is more straightforward (crash at > https://codebrowser.dev/qt6/qtbase/src/gui/kernel/qpointingdevice.cpp. > html#279) > > ``` > #0 0x00007ffff3447808 in QPointingDevice::uniqueId > (this=this@entry=0x1ec49350) at > /build/qtbase-everywhere-src-6.9.0/src/gui/kernel/qpointingdevice.cpp:279 > #1 0x00007ffff34011e9 in QGuiApplicationPrivate::processTabletEvent > (e=0xef7ea30) at > /build/qtbase-everywhere-src-6.9.0/src/gui/kernel/qguiapplication.cpp:2939 > #2 0x00007ffff346ce64 in QWindowSystemInterface::sendWindowSystemEvents > (flags=flags@entry=...) at > /build/qtbase-everywhere-src-6.9.0/src/gui/kernel/qwindowsysteminterface.cpp: > 1113 > #3 0x00007ffff346d08f in QWindowSystemInterface::flushWindowSystemEvents > (flags=...) at > /build/qtbase-everywhere-src-6.9.0/src/gui/kernel/qwindowsysteminterface.cpp: > 1082 > #4 0x00007ffff2c1ca5e in doActivate<false> (sender=0xe3add0, > signal_index=4, argv=0x7ffffffdc538) at > /build/qtbase-everywhere-src-6.9.0/src/corelib/kernel/qobject.cpp:4150 > #5 0x00007ffff2c128e7 in QMetaObject::activate > (sender=sender@entry=0xe3add0, m=m@entry=0x7ffff30b0fa0 > <QAbstractEventDispatcher::staticMetaObject>, > local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at > /build/qtbase-everywhere-src-6.9.0/src/corelib/kernel/qobject.cpp:4198 > #6 0x00007ffff2bab647 in QAbstractEventDispatcher::awake > (this=this@entry=0xe3add0) at > /build/qtbase-everywhere-src-6.9.0/build/src/corelib/Core_autogen/include/ > moc_qabstracteventdispatcher.cpp:128 > #7 0x00007ffff2ec39db in QEventDispatcherGlib::processEvents > (this=0xe3add0, flags=...) at > /build/qtbase-everywhere-src-6.9.0/src/corelib/kernel/qeventdispatcher_glib. > cpp:406 > #8 0x00007ffff2bc0beb in QEventLoop::exec (this=this@entry=0x7ffffffdc680, > flags=..., flags@entry=...) at > /build/qtbase-everywhere-src-6.9.0/src/corelib/global/qflags.h:77 > #9 0x00007ffff2bbc02e in QCoreApplication::exec () at > /build/qtbase-everywhere-src-6.9.0/src/corelib/global/qflags.h:77 > #10 0x000000000040a088 in main () > ``` > > gdb says the value of `d` is `0x114` > ``` > (gdb) print d > $7 = (const QPointingDevicePrivate * const) 0x114 > ``` > > so this likely is some kind of use-after-free bug of `QPointingDevice` or > some related class? Got this crash 3 times, 2 out of 3 times the value of `d` are `0x114`, the other one is null ``` (gdb) print d $1 = (const QPointingDevicePrivate * const) 0x0 ``` -- You are receiving this mail because: You are watching all bug changes.
