Bug 301516

Application: kwin (4.7.4 (4.7.4))
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.8.1
Operating System: Linux 3.4-1.slh.2-aptosid-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

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

An application (RockboxUtility) did not respond anymore. I tried to close it. kwin showed up the dialog that the app is not responding anymore and asked me if kwin should terminate the app. I decided to let kwin kill the app. But it did not work.

Some seconds later I again tried to close the window. The kwin dialog for termination did show up again. I kept it open and decided to "kill -9" the application in konsole. On pressing enter on this command kwin did freeze. Nothing moved anymore, only the mouse cursor could still be dragged. Approx. half a minute later kwin did a restart and showed up the bug reporting assistant.

-- 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 0x7f96089cc780 (LWP 4314))]

Thread 2 (Thread 0x7f95fed64700 (LWP 4409)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f961aed7437 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f961aed7469 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f9612347b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#4  0x00007f961c0d16dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f96089cc780 (LWP 4314)):
[KCrash Handler]
#6  QProcess::setProcessState (this=0x1882790, state=state@entry=QProcess::NotRunning) at io/qprocess.cpp:1770
#7  0x00007f961839cc4f in QProcessPrivate::cleanup (this=this@entry=0x1cf0ad0) at io/qprocess.cpp:799
#8  0x00007f96183a0c53 in QProcessPrivate::_q_processDied (this=0x1cf0ad0) at io/qprocess.cpp:1058
#9  0x00007f96183a0d0e 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 0x00007f961841aa9f in QMetaObject::activate (sender=0x1b21810, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff9be467c0) at kernel/qobject.cpp:3547
#12 0x00007f961846511e in QSocketNotifier::activated (this=<optimized out>, _t1=26) at .moc/release-shared/moc_qsocketnotifier.cpp:103
#13 0x00007f96184223bb in QSocketNotifier::event (this=0x1b21810, e=0x7fff9be46df0) at kernel/qsocketnotifier.cpp:317
#14 0x00007f96177b07dc in QApplicationPrivate::notify_helper (this=this@entry=0xd3e5f0, receiver=receiver@entry=0x1b21810, e=e@entry=0x7fff9be46df0) at kernel/qapplication.cpp:4559
#15 0x00007f96177b4d0a in QApplication::notify (this=0x7fff9be474f0, receiver=0x1b21810, e=0x7fff9be46df0) at kernel/qapplication.cpp:4420
#16 0x00007f961bbbfad6 in KApplication::notify (this=0x7fff9be474f0, receiver=0x1b21810, event=0x7fff9be46df0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f961840514e in QCoreApplication::notifyInternal (this=0x7fff9be474f0, receiver=0x1b21810, event=0x7fff9be46df0) at kernel/qcoreapplication.cpp:876
#18 0x00007f9618434805 in sendEvent (event=0x7fff9be46df0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QEventDispatcherUNIX::activateSocketNotifiers (this=this@entry=0xd38580) at kernel/qeventdispatcher_unix.cpp:884
#20 0x00007f9618435570 in QEventDispatcherUNIXPrivate::doSelect (this=0xfffffffffffffe48, this@entry=0xd3e910, flags=..., timeout=0x7fff9be46f90) at kernel/qeventdispatcher_unix.cpp:309
#21 0x00007f9618436042 in QEventDispatcherUNIX::processEvents (this=0xd38580, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#22 0x00007f961785273f in QEventDispatcherX11::processEvents (this=0xd38580, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#23 0x00007f961840414f in QEventLoop::processEvents (this=this@entry=0x7fff9be47270, flags=...) at kernel/qeventloop.cpp:149
#24 0x00007f96184043d8 in QEventLoop::exec (this=0x7fff9be47270, flags=...) at kernel/qeventloop.cpp:204
#25 0x00007f96184092d8 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#26 0x00007f961c3dd0fa in kdemain (argc=3, argv=0x7fff9be47678) at ../../kwin/main.cpp:517
#27 0x00007f961c017ead in __libc_start_main (main=<optimized out>, argc=<optimized out>, ubp_av=<optimized out>, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9be47668) at libc-start.c:228
#28 0x0000000000400761 in _start ()

This bug may be a duplicate of or related to bug 196350.

Possible duplicates by query: bug 300955, bug 295920, bug 290711, bug 289316, bug 277190.

Reported using DrKonqi