https://bugs.kde.org/show_bug.cgi?id=385481
Bug ID: 385481
Summary: KWin segfaults on alt+tab in certain cases
Product: kwin
Version: 5.10.5
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: bytew...@ponypwnage.com
Target Milestone: ---
Application: kwin_x11 (5.10.5)
Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.4-1-ARCH x86_64
Distribution (Platform): Archlinux Packages
-- Information about the crash:
- What I was doing when the application crashed:
Simply pressing alt + tab then an additional tab to switch applications. Seems
to occur when the alt + tab switcher is used too quickly (ie, as it's just
fading in). Initial crash occured just as a Chrome window was being removed,
but I'm not sure if that's entirely relevant---restarting kwin_x11 from a
terminal and disowning the process to get it up and running again caused the
same problem on alt + tabbing.
The crash can be reproduced every time.
-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f122895a840 (LWP 10423))]
Thread 16 (Thread 0x7f11bd8bd700 (LWP 10532)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 15 (Thread 0x7f11abe8e700 (LWP 10447)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f12247ebb04 in () at /usr/lib/libQt5Script.so.5
#2 0x00007f12247ebb49 in () at /usr/lib/libQt5Script.so.5
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 14 (Thread 0x7f11bd0bc700 (LWP 10445)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 13 (Thread 0x7f11ce7fc700 (LWP 10443)):
#0 0x00007f12282dedb6 in ppoll () at /usr/lib/libc.so.6
#1 0x00007f12258d8b83 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/libQt5Core.so.5
#2 0x00007f12258da31f in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#3 0x00007f1225880fdb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#4 0x00007f122569a3ee in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5 0x00007f121ff103d9 in () at /usr/lib/libQt5Qml.so.5
#6 0x00007f122569f13b in () at /usr/lib/libQt5Core.so.5
#7 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 12 (Thread 0x7f11cf7fe700 (LWP 10441)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 11 (Thread 0x7f11cffff700 (LWP 10440)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 10 (Thread 0x7f11eccae700 (LWP 10439)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 9 (Thread 0x7f11ed4af700 (LWP 10438)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 8 (Thread 0x7f11edcb0700 (LWP 10437)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 7 (Thread 0x7f11ee4b1700 (LWP 10436)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 6 (Thread 0x7f11eecb2700 (LWP 10435)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 5 (Thread 0x7f11ef6b9700 (LWP 10434)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 4 (Thread 0x7f11efeba700 (LWP 10433)):
#0 0x00007f122142838d in pthread_cond_wait@@GLIBC_2.3.2 () at
/usr/lib/libpthread.so.0
#1 0x00007f11f8f3e81c in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2 0x00007f11f8f3e728 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#4 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 3 (Thread 0x7f1206c60700 (LWP 10432)):
#0 0x00007f12282dedb6 in ppoll () at /usr/lib/libc.so.6
#1 0x00007f12258d8b83 in qt_safe_poll(pollfd*, unsigned long, timespec const*)
() at /usr/lib/libQt5Core.so.5
#2 0x00007f12258da31f in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#3 0x00007f1225880fdb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#4 0x00007f122569a3ee in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5 0x00007f121ff103d9 in () at /usr/lib/libQt5Qml.so.5
#6 0x00007f122569f13b in () at /usr/lib/libQt5Core.so.5
#7 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#8 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 2 (Thread 0x7f120d112700 (LWP 10430)):
#0 0x00007f12258da2c1 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#1 0x00007f1225880fdb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#2 0x00007f122569a3ee in QThread::exec() () at /usr/lib/libQt5Core.so.5
#3 0x00007f121f09f376 in () at /usr/lib/libQt5DBus.so.5
#4 0x00007f122569f13b in () at /usr/lib/libQt5Core.so.5
#5 0x00007f122142208a in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f12282e91bf in clone () at /usr/lib/libc.so.6
Thread 1 (Thread 0x7f122895a840 (LWP 10423)):
[KCrash Handler]
#5 0x00007f11f92ec9c7 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#6 0x00007f11f905ea63 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#7 0x00007f11f905cb0f in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#8 0x00007f11f905cfb5 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#9 0x00007f11f8e7d6b7 in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#10 0x00007f11f8fc172a in () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#11 0x00007f11fab7a47f in () at /usr/lib/libGLX_mesa.so.0
#12 0x00007f120e282d15 in () at
/usr/lib/qt/plugins/xcbglintegrations/libqxcb-glx-integration.so
#13 0x00007f1225e2304f in QOpenGLContext::swapBuffers(QSurface*) () at
/usr/lib/libQt5Gui.so.5
#14 0x00007f12205e8160 in () at /usr/lib/libQt5Quick.so.5
#15 0x00007f122065e996 in QQuickWindow::event(QEvent*) () at
/usr/lib/libQt5Quick.so.5
#16 0x00007f1204f5a0d4 in PlasmaQuick::Dialog::event(QEvent*) () at
/usr/lib/libKF5PlasmaQuick.so.5
#17 0x00007f12265a6e2c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/libQt5Widgets.so.5
#18 0x00007f12265ae906 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/libQt5Widgets.so.5
#19 0x00007f1225882bb0 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/libQt5Core.so.5
#20 0x00007f1225df4273 in QWindowPrivate::deliverUpdateRequest() () at
/usr/lib/libQt5Gui.so.5
#21 0x00007f1225df479b in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#22 0x00007f122065e936 in QQuickWindow::event(QEvent*) () at
/usr/lib/libQt5Quick.so.5
#23 0x00007f1204f5a0d4 in PlasmaQuick::Dialog::event(QEvent*) () at
/usr/lib/libKF5PlasmaQuick.so.5
#24 0x00007f12265a6e2c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/libQt5Widgets.so.5
#25 0x00007f12265ae906 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/libQt5Widgets.so.5
#26 0x00007f1225882bb0 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/libQt5Core.so.5
#27 0x00007f12258dc488 in QTimerInfoList::activateTimers() () at
/usr/lib/libQt5Core.so.5
#28 0x00007f12258da584 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#29 0x00007f12104150fe in () at /usr/lib/libQt5XcbQpa.so.5
#30 0x00007f1225880fdb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
#31 0x00007f122588a028 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#32 0x00007f12285b36d3 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#33 0x00007f1228213f6a in __libc_start_main () at /usr/lib/libc.so.6
#34 0x0000562cdd1567ca in _start ()
Reported using DrKonqi
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