Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic-pae i686
Distribution: Ubuntu 11.10

-- Information about the crash:
I was developing something on netbeans (php), and this suddenly crashed. happens a lot of times (i supose it may be graphic card not to fancy)

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb1265730 (LWP 1614))]

Thread 4 (Thread 0xaa3c2b70 (LWP 1615)):
#0  0xb309bd10 in __GI_clock_gettime (clock_id=1, tp=0xaa3c2008) at ../sysdeps/unix/clock_gettime.c:116
#1  0xb64877d5 in do_gettime (frac=0xaa3c2000, sec=0xaa3c1ff8) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0xb655a4b6 in QTimerInfoList::updateCurrentTime (this=0xa70bf34) at kernel/qeventdispatcher_unix.cpp:339
#4  0xb655a80a in QTimerInfoList::timerWait (this=0xa70bf34, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0xb6559053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xaa3c210c) at kernel/qeventdispatcher_glib.cpp:136
#6  0xb65590ed in timerSourcePrepare (source=0xa70bf00, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0xb2fe088c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb2fe1637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb2fe1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0xb6559b37 in QEventDispatcherGlib::processEvents (this=0xa70a3f0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0xb652a1dd in QEventLoop::processEvents (this=0xaa3c2290, flags=...) at kernel/qeventloop.cpp:149
#12 0xb652a421 in QEventLoop::exec (this=0xaa3c2290, flags=...) at kernel/qeventloop.cpp:201
#13 0xb642d90b in QThread::exec (this=0xa708c98) at thread/qthread.cpp:498
#14 0xb650ae2d in QInotifyFileSystemWatcherEngine::run (this=0xa708c98) at io/qfilesystemwatcher_inotify.cpp:248
#15 0xb64307b3 in QThreadPrivate::start (arg=0xa708c98) at thread/qthread_unix.cpp:331
#16 0xb30fbd31 in start_thread (arg=0xaa3c2b70) at pthread_create.c:304
#17 0xb770e0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xa8904b70 (LWP 1616)):
#0  0xb30fddbd in __pthread_mutex_lock (mutex=0xa85ce44) at pthread_mutex_lock.c:61
#1  0xb771bf14 in pthread_mutex_lock (mutex=0xa85ce44) at forward.c:182
#2  0xb2fe08bb in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2fe1637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2fe1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb6559b37 in QEventDispatcherGlib::processEvents (this=0xa159c40, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb652a1dd in QEventLoop::processEvents (this=0xa8904290, flags=...) at kernel/qeventloop.cpp:149
#7  0xb652a421 in QEventLoop::exec (this=0xa8904290, flags=...) at kernel/qeventloop.cpp:201
#8  0xb642d90b in QThread::exec (this=0xa83be08) at thread/qthread.cpp:498
#9  0xb650ae2d in QInotifyFileSystemWatcherEngine::run (this=0xa83be08) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb64307b3 in QThreadPrivate::start (arg=0xa83be08) at thread/qthread_unix.cpp:331
#11 0xb30fbd31 in start_thread (arg=0xa8904b70) at pthread_create.c:304
#12 0xb770e0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa6e8ab70 (LWP 1622)):
#0  0xb7749b66 in __i686.get_pc_thunk.bx () from /lib/i386-linux-gnu/libc.so.6
#1  0xb771bf28 in pthread_mutex_unlock (mutex=0xaa19eb4) at forward.c:184
#2  0xb2fe0e70 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2fe18f0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2fe1f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xa776acea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb30085f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb30fbd31 in start_thread (arg=0xa6e8ab70) at pthread_create.c:304
#8  0xb770e0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb1265730 (LWP 1614)):
[KCrash Handler]
#7  operator== (value=0, this=0x9) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#8  isNull (this=0xc009c20) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#9  operator! (this=0xc009c20) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#10 TaskManager::TaskItem::task (this=0xb365b68) at ../../../libs/taskmanager/taskitem.cpp:113
#11 0xafedd662 in WindowTaskItem::publishIconGeometry (this=0xc39a268) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#12 0xafeee688 in AbstractTaskItem::timerEvent (this=0xc39a268, event=0xbf93541c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#13 0xb6543994 in QObject::event (this=0xc39a268, e=0xbf93541c) at kernel/qobject.cpp:1181
#14 0xb6115bd4 in QGraphicsWidget::event (this=0xc39a268, event=0xbf93541c) at graphicsview/qgraphicswidget.cpp:1455
#15 0xb5a56d54 in notify_helper (e=0xbf93541c, receiver=0xc39a268, this=0x9fc3ad8) at kernel/qapplication.cpp:4486
#16 QApplicationPrivate::notify_helper (this=0x9fc3ad8, receiver=0xc39a268, e=0xbf93541c) at kernel/qapplication.cpp:4458
#17 0xb5a5c103 in QApplication::notify (this=0xbf93541c, receiver=0xc39a268, e=0xbf93541c) at kernel/qapplication.cpp:3886
#18 0xb6b90681 in KApplication::notify (this=0x9fb80f0, receiver=0xc39a268, event=0xbf93541c) at ../../kdeui/kernel/kapplication.cpp:311
#19 0xb652b19e in QCoreApplication::notifyInternal (this=0x9fb80f0, receiver=0xc39a268, event=0xbf93541c) at kernel/qcoreapplication.cpp:787
#20 0xb655bc10 in sendEvent (event=0xbf93541c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (this=0x9fc6c7c) at kernel/qeventdispatcher_unix.cpp:603
#22 0xb6559155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=0x9fc6cb0) at kernel/qeventdispatcher_glib.cpp:231
#24 0xb2fe125f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb2fe1990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb2fe1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0xb6559ada in QEventDispatcherGlib::processEvents (this=0x9f79218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#28 0xb5b0ee3a in QGuiEventDispatcherGlib::processEvents (this=0x9f79218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0xb652a1dd in QEventLoop::processEvents (this=0xbf935694, flags=...) at kernel/qeventloop.cpp:149
#30 0xb652a421 in QEventLoop::exec (this=0xbf935694, flags=...) at kernel/qeventloop.cpp:201
#31 0xb652f19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0xb5a548f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#33 0xb780718b in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#34 0x0804850b in ?? ()
#35 0xb7655113 in __libc_start_main (main=0x80484f0, argc=1, ubp_av=0xbf935894, init=0x80485e0 <__libc_csu_init>, fini=0x8048650 <__libc_csu_fini>, rtld_fini=0xb7861bc0, stack_end=0xbf93588c) at libc-start.c:226
#36 0x08048531 in _start ()

Possible duplicates by query: bug 291127, bug 290995, bug 290813, bug 290810, bug 290717.

Reported using DrKonqi