Application: kwin (4.8.5 (4.8.5))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-52-generic x86_64
Distribution: Ubuntu 12.04.2 LTS

-- Information about the crash:
- What I was doing when the application crashed:

I duuno why thunderbird was freeze, but i try kill them with killall command.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe74a39a780 (LWP 29311))]

Thread 2 (Thread 0x7fe727b47700 (LWP 29319)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe746665222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fe746665259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fe73e49be9a in start_thread (arg=0x7fe727b47700) at pthread_create.c:308
#4  0x00007fe749bb0ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe74a39a780 (LWP 29311)):
[KCrash Handler]
#6  QProcess::setProcessState (this=0x16b8ed0, state=QProcess::NotRunning) at io/qprocess.cpp:1770
#7  0x00007fe74530b74f in QProcessPrivate::cleanup (this=0x2408e80) at io/qprocess.cpp:799
#8  0x00007fe745312cb9 in QProcessPrivate::_q_processDied (this=0x2408e80) at io/qprocess.cpp:1058
#9  0x00007fe745312d7e in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at .moc/release-shared/moc_qprocess.cpp:92
#10 QProcess::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qprocess.cpp:69
#11 0x00007fe74538a281 in QMetaObject::activate (sender=0x24ad5e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffa68a0630) at kernel/qobject.cpp:3547
#12 0x00007fe7453d72fe in QSocketNotifier::activated (this=<optimized out>, _t1=26) at .moc/release-shared/moc_qsocketnotifier.cpp:103
#13 0x00007fe74539360b in QSocketNotifier::event (this=0x24ad5e0, e=0x7fffa68a0ca0) at kernel/qsocketnotifier.cpp:317
#14 0x00007fe7446f8894 in notify_helper (e=0x7fffa68a0ca0, receiver=0x24ad5e0, this=0x1082b00) at kernel/qapplication.cpp:4559
#15 QApplicationPrivate::notify_helper (this=0x1082b00, receiver=0x24ad5e0, e=0x7fffa68a0ca0) at kernel/qapplication.cpp:4531
#16 0x00007fe7446fd713 in QApplication::notify (this=0x7fffa68a11e0, receiver=0x24ad5e0, e=0x7fffa68a0ca0) at kernel/qapplication.cpp:4420
#17 0x00007fe74968a3f6 in KApplication::notify (this=0x7fffa68a11e0, receiver=0x24ad5e0, event=0x7fffa68a0ca0) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007fe745375e9c in QCoreApplication::notifyInternal (this=0x7fffa68a11e0, receiver=0x24ad5e0, event=0x7fffa68a0ca0) at kernel/qcoreapplication.cpp:876
#19 0x00007fe7453a6692 in sendEvent (event=0x7fffa68a0ca0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 QEventDispatcherUNIX::activateSocketNotifiers (this=<optimized out>) at kernel/qeventdispatcher_unix.cpp:884
#21 0x00007fe7453a78da in QEventDispatcherUNIXPrivate::doSelect (this=0x1082ec0, flags=..., timeout=0x103aad0) at kernel/qeventdispatcher_unix.cpp:309
#22 0x00007fe7453a7ca3 in QEventDispatcherUNIX::processEvents (this=0x103aad0, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#23 0x00007fe7447a1bf8 in QEventDispatcherX11::processEvents (this=0x103aad0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#24 0x00007fe745374c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007fe745374ed7 in QEventLoop::exec (this=0x7fffa68a1120, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007fe745379f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#27 0x00007fe749edcc36 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:541
#28 0x00007fe749ade76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=3, ubp_av=0x7fffa68a1908, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa68a18f8) at libc-start.c:226
#29 0x0000000000400661 in _start ()

Possible duplicates by query: bug 319624, bug 315123, bug 306995.

Reported using DrKonqi