Application: kwin (4.11.3)
KDE Platform Version: 4.11.3
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic i686
Distribution: Linux Mint 16 Petra

-- Information about the crash:
- What I was doing when the application crashed:
It does it often while switching from a window to an other or when I send an email using Thunderbird (normally, the composition window would close by itself).

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb123b740 (LWP 5111))]

Thread 3 (Thread 0xaeb03b40 (LWP 5795)):
#0  0xb7722424 in __kernel_vsyscall ()
#1  0xb4c0384b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb74b29bc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb6ed4ef2 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb6ed4f3f in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb4bffd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0xb74a501e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xad95cb40 (LWP 5796)):
#0  0xb7722424 in __kernel_vsyscall ()
#1  0xb74b84d2 in clock_gettime () from /lib/i386-linux-gnu/libc.so.6
#2  0xb5e4f3ec in do_gettime (frac=0xad95c0e0, sec=0xad95c0d8) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0xb5f34fd2 in updateCurrentTime (this=0xae201ba4, this@entry=0xae202240) at kernel/qeventdispatcher_unix.cpp:354
#5  QTimerInfoList::timerWait (this=this@entry=0xae201ba4, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#6  0xb5f36d26 in QEventDispatcherUNIX::processEvents (this=0xae200488, flags=...) at kernel/qeventdispatcher_unix.cpp:924
#7  0xb5f029f3 in QEventLoop::processEvents (this=this@entry=0xad95c228, flags=...) at kernel/qeventloop.cpp:149
#8  0xb5f02d19 in QEventLoop::exec (this=this@entry=0xad95c228, flags=...) at kernel/qeventloop.cpp:204
#9  0xb5df1e3d in QThread::exec (this=this@entry=0x8e98fa8) at thread/qthread.cpp:542
#10 0xb5ee2e14 in QInotifyFileSystemWatcherEngine::run (this=0x8e98fa8) at io/qfilesystemwatcher_inotify.cpp:265
#11 0xb5df472f in QThreadPrivate::start (arg=0x8e98fa8) at thread/qthread_unix.cpp:338
#12 0xb4bffd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb74a501e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb123b740 (LWP 5111)):
[KCrash Handler]
#7  0xffeeeded in ?? ()
#8  0xb75e383e in KWin::Workspace::constrainedStackingOrder (this=this@entry=0x8f7f630) at ../../kwin/layers.cpp:517
#9  0xb75e3e3b in KWin::Workspace::updateStackingOrder (this=this@entry=0x8f7f630, propagate_new_clients=<optimized out>) at ../../kwin/layers.cpp:125
#10 0xb75e41ef in updateStackingOrder (propagate_new_clients=<optimized out>, this=0x8f7f630) at ../../kwin/layers.cpp:623
#11 KWin::Workspace::blockStackingUpdates (this=0x8f7f630, block=block@entry=false) at ../../kwin/layers.cpp:624
#12 0xb75d26ef in ~StackingUpdatesBlocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../kwin/workspace.h:565
#13 KWin::Client::releaseWindow (this=this@entry=0x93a3000, on_shutdown=on_shutdown@entry=false) at ../../kwin/client.cpp:317
#14 0xb75f1268 in KWin::Client::unmapNotifyEvent (this=this@entry=0x93a3000, e=e@entry=0xbffd689c) at ../../kwin/events.cpp:595
#15 0xb75f36b4 in KWin::Client::windowEvent (this=0x93a3000, e=0xbffd689c) at ../../kwin/events.cpp:451
#16 0xb75f450f in KWin::Workspace::workspaceEvent (this=0x8f7f630, e=e@entry=0xbffd689c) at ../../kwin/events.cpp:161
#17 0xb75e777c in KWin::Application::x11EventFilter (this=0xbffd6b18, e=0xbffd689c) at ../../kwin/main.cpp:422
#18 0xb5489e96 in qt_x11EventFilter (ev=0xbffd689c) at kernel/qapplication_x11.cpp:441
#19 0xb549c486 in QApplication::x11ProcessEvent (this=0xbffd6b18, event=event@entry=0xbffd689c) at kernel/qapplication_x11.cpp:3458
#20 0xb54c9d45 in QEventDispatcherX11::processEvents (this=0x8e11ec0, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#21 0xb5f029f3 in QEventLoop::processEvents (this=this@entry=0xbffd6a18, flags=...) at kernel/qeventloop.cpp:149
#22 0xb5f02d19 in QEventLoop::exec (this=this@entry=0xbffd6a18, flags=...) at kernel/qeventloop.cpp:204
#23 0xb5f0889e in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#24 0xb5412974 in QApplication::exec () at kernel/qapplication.cpp:3828
#25 0xb75e8b8e in kdemain (argc=1, argv=0xbffd6c04) at ../../kwin/main.cpp:597
#26 0x0804855b in main (argc=1, argv=0xbffd6c04) at kwin_dummy.cpp:3

The reporter indicates this bug may be a duplicate of or related to bug 317765.

Possible duplicates by query: bug 326416, bug 326376, bug 321445, bug 320349, bug 319927.

Reported using DrKonqi