Application: plasma-desktop (4.10.5)
KDE Platform Version: 4.10.5
Qt Version: 4.8.4
Operating System: Linux 3.8.0-29-generic i686
Distribution: Ubuntu 13.04

-- Information about the crash:
- What I was doing when the application crashed: KDE has chrased several times today, when closing windows.

- Unusual behavior I noticed:
KWin appears to drop completely, panels unavailable.
- Custom settings of the application:

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb10a7740 (LWP 1883))]

Thread 6 (Thread 0xae3cdb40 (LWP 1885)):
#0  0xb76e4424 in __kernel_vsyscall ()
#1  0xb1f6184b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb759ad7c in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb2f5d0ad in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb2f5d0df in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb1f5dd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0xb758d3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 5 (Thread 0xac6f2b40 (LWP 1886)):
#0  0xb1f5fd33 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb759af84 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb1e91d30 in g_mutex_lock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1e4dd2b in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1e4e5cf in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb1e4e831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb5f89c3f in QEventDispatcherGlib::processEvents (this=0xabd00468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0xb5f563ec in QEventLoop::processEvents (this=this@entry=0xac6f2228, flags=...) at kernel/qeventloop.cpp:149
#8  0xb5f566e1 in QEventLoop::exec (this=this@entry=0xac6f2228, flags=...) at kernel/qeventloop.cpp:204
#9  0xb5e41fec in QThread::exec (this=this@entry=0x9b8e368) at thread/qthread.cpp:542
#10 0xb5f35f2d in QInotifyFileSystemWatcherEngine::run (this=0x9b8e368) at io/qfilesystemwatcher_inotify.cpp:256
#11 0xb5e44b18 in QThreadPrivate::start (arg=0x9b8e368) at thread/qthread_unix.cpp:338
#12 0xb1f5dd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb758d3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 4 (Thread 0xa570db40 (LWP 1889)):
#0  0xb5e24523 in __x86.get_pc_thunk.bx () from /usr/lib/i386-linux-gnu/libQtCore.so.4
#1  0xb5ea309c in qt_gettime () at tools/qelapsedtimer_unix.cpp:138
#2  0xb5f8a80e in QTimerInfoList::updateCurrentTime (this=this@entry=0xa4e02074) at kernel/qeventdispatcher_unix.cpp:354
#3  0xb5f8ab9a in QTimerInfoList::timerWait (this=0xa4e02074, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#4  0xb5f89373 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xa570d08c) at kernel/qeventdispatcher_glib.cpp:136
#5  0xb5f8940d in timerSourcePrepare (source=0xa4e02040, timeout=0xa570d08c) at kernel/qeventdispatcher_glib.cpp:169
#6  0xb1e4dd21 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb1e4e5cf in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb1e4e831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb5f89c3f in QEventDispatcherGlib::processEvents (this=0xa4e00468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#10 0xb5f563ec in QEventLoop::processEvents (this=this@entry=0xa570d228, flags=...) at kernel/qeventloop.cpp:149
#11 0xb5f566e1 in QEventLoop::exec (this=this@entry=0xa570d228, flags=...) at kernel/qeventloop.cpp:204
#12 0xb5e41fec in QThread::exec (this=this@entry=0x9e44328) at thread/qthread.cpp:542
#13 0xb5f35f2d in QInotifyFileSystemWatcherEngine::run (this=0x9e44328) at io/qfilesystemwatcher_inotify.cpp:256
#14 0xb5e44b18 in QThreadPrivate::start (arg=0x9e44328) at thread/qthread_unix.cpp:338
#15 0xb1f5dd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#16 0xb758d3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 3 (Thread 0xa20eab40 (LWP 1895)):
#0  0xb75a08e4 in clock_gettime () from /lib/i386-linux-gnu/libc.so.6
#1  0xb5ea30d5 in do_gettime (frac=0xa20e9f70, sec=0xa20e9f68) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0xb5f8a80e in QTimerInfoList::updateCurrentTime (this=this@entry=0xa92f7ec) at kernel/qeventdispatcher_unix.cpp:354
#4  0xb5f8ab9a in QTimerInfoList::timerWait (this=0xa92f7ec, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#5  0xb5f89373 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xa20ea09c) at kernel/qeventdispatcher_glib.cpp:136
#6  0xb5f8940d in timerSourcePrepare (source=0xa92f7b8, timeout=0xa20ea09c) at kernel/qeventdispatcher_glib.cpp:169
#7  0xb1e4dd21 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb1e4e5cf in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb1e4e831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0xb5f89c3f in QEventDispatcherGlib::processEvents (this=0xa92f940, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#11 0xb5f563ec in QEventLoop::processEvents (this=this@entry=0xa20ea238, flags=...) at kernel/qeventloop.cpp:149
#12 0xb5f566e1 in QEventLoop::exec (this=this@entry=0xa20ea238, flags=...) at kernel/qeventloop.cpp:204
#13 0xb5e41fec in QThread::exec (this=0xa933f98) at thread/qthread.cpp:542
#14 0xa2437402 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#15 0xb5e44b18 in QThreadPrivate::start (arg=0xa933f98) at thread/qthread_unix.cpp:338
#16 0xb1f5dd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0xb758d3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xa0ba4b40 (LWP 2247)):
#0  0xb1f5fe2f in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb759af84 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb1e91d30 in g_mutex_lock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1e4dd2b in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1e4e5cf in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb1e4e831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb5f89c3f in QEventDispatcherGlib::processEvents (this=0xa4e0d410, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0xb5f563ec in QEventLoop::processEvents (this=this@entry=0xa0ba4258, flags=...) at kernel/qeventloop.cpp:149
#8  0xb5f566e1 in QEventLoop::exec (this=this@entry=0xa0ba4258, flags=...) at kernel/qeventloop.cpp:204
#9  0xb5e41fec in QThread::exec (this=this@entry=0xbd7a310) at thread/qthread.cpp:542
#10 0xb5e4214b in QThread::run (this=0xbd7a310) at thread/qthread.cpp:609
#11 0xb5e44b18 in QThreadPrivate::start (arg=0xbd7a310) at thread/qthread_unix.cpp:338
#12 0xb1f5dd78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb758d3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb10a7740 (LWP 1883)):
[KCrash Handler]
#7  QHash<QObject*, QObject*>::findNode (this=this@entry=0xbdb8e10, ahp=ahp@entry=0x0, akey=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:884
#8  0xb5f7549f in contains (this=0xbdb8e10, akey=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:874
#9  QSignalMapper::map (this=this@entry=0xbdb9d04, sender=0xbcbd978) at kernel/qsignalmapper.cpp:271
#10 0xb5f7562e in QSignalMapper::map (this=this@entry=0xbdb9d04) at kernel/qsignalmapper.cpp:257
#11 0xb5f75a84 in qt_static_metacall (_a=0xbfe7c348, _id=4, _o=0xbdb9d04, _c=<optimized out>) at .moc/release-shared/moc_qsignalmapper.cpp:64
#12 QSignalMapper::qt_static_metacall (_o=0xbdb9d04, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfe7c348) at .moc/release-shared/moc_qsignalmapper.cpp:54
#13 0xb5f6db56 in QMetaObject::activate (sender=sender@entry=0xbcbd978, m=m@entry=0xb5dcf7c8 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0xbfe7c348) at kernel/qobject.cpp:3539
#14 0xb5b5fb6d in QAbstractButton::clicked (this=this@entry=0xbcbd978, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:220
#15 0xb58657dd in QAbstractButtonPrivate::emitClicked (this=this@entry=0xbdce4f0) at widgets/qabstractbutton.cpp:548
#16 0xb5865fdb in QAbstractButtonPrivate::click (this=this@entry=0xbdce4f0) at widgets/qabstractbutton.cpp:541
#17 0xb5866296 in QAbstractButton::mouseReleaseEvent (this=0xbcbd978, e=0xbfe7ca54) at widgets/qabstractbutton.cpp:1123
#18 0xb549c710 in QWidget::event (this=0xbcbd978, event=0xbfe7ca54) at kernel/qwidget.cpp:8375
#19 0xb5867132 in QAbstractButton::event (this=this@entry=0xbcbd978, e=e@entry=0xbfe7ca54) at widgets/qabstractbutton.cpp:1082
#20 0xb59066f8 in QPushButton::event (this=0xbcbd978, e=0xbfe7ca54) at widgets/qpushbutton.cpp:683
#21 0xb5445c7c in QApplicationPrivate::notify_helper (this=0x9491f48, receiver=0xbcbd978, e=0xbfe7ca54) at kernel/qapplication.cpp:4567
#22 0xb5449587 in QApplication::notify (this=0x9491f48, receiver=0xbcbd978, e=0xbfe7ca54) at kernel/qapplication.cpp:4110
#23 0xb65f1491 in KApplication::notify (this=0x9486fb0, receiver=0xbcbd978, event=0xbfe7ca54) at ../../kdeui/kernel/kapplication.cpp:311
#24 0xb5f5790e in QCoreApplication::notifyInternal (this=0x9486fb0, receiver=receiver@entry=0xbcbd978, event=event@entry=0xbfe7ca54) at kernel/qcoreapplication.cpp:946
#25 0xb544c823 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#26 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0xbcbd978, event=event@entry=0xbfe7ca54, alienWidget=alienWidget@entry=0xbcbd978, nativeWidget=nativeWidget@entry=0xbdd12b0, buttonDown=buttonDown@entry=0xb5dd8d14 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#27 0xb54ce785 in QETWidget::translateMouseEvent (this=0xbdd12b0, event=0xbfe7ce7c) at kernel/qapplication_x11.cpp:4631
#28 0xb54cd575 in QApplication::x11ProcessEvent (this=0x9486fb0, event=0xbfe7ce7c) at kernel/qapplication_x11.cpp:3746
#29 0xb54fc954 in x11EventSourceDispatch (s=0x94946a8, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#30 0xb1e4e3b3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#31 0xb1e4e750 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#32 0xb1e4e831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#33 0xb5f89c21 in QEventDispatcherGlib::processEvents (this=this@entry=0x942fec0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#34 0xb54fca5a in QGuiEventDispatcherGlib::processEvents (this=0x942fec0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#35 0xb5f563ec in QEventLoop::processEvents (this=this@entry=0xbfe7d178, flags=...) at kernel/qeventloop.cpp:149
#36 0xb5f566e1 in QEventLoop::exec (this=this@entry=0xbfe7d178, flags=...) at kernel/qeventloop.cpp:204
#37 0xb5f5c3fa in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#38 0xb5443fc4 in QApplication::exec () at kernel/qapplication.cpp:3828
#39 0xb769de32 in kdemain (argc=1, argv=0xbfe7d334) at ../../../../plasma/desktop/shell/main.cpp:126
#40 0x0804855b in main (argc=1, argv=0xbfe7d334) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 311157.

Reported using DrKonqi