Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.2 (4.8.2)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-24-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
plasma become freeze and crashes sometimes when trying to add python widgets, ie pyWeather....
- Unusual behavior I noticed:
Plazma becomes freeze
- Custom settings of the application:
using python widget

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa020149780 (LWP 1554))]

Thread 4 (Thread 0x7f9ffe636700 (LWP 1555)):
#0  0x00007fa0144def69 in __pthread_mutex_lock (mutex=0x7f9ff8000a60) at pthread_mutex_lock.c:92
#1  0x00007fa013c13561 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa013bd7729 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa013bd7f1b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa013bd8124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa01cbf8426 in QEventDispatcherGlib::processEvents (this=0x7f9ff80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fa01cbc7c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa01cbc7ed7 in QEventLoop::exec (this=0x7f9ffe635dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa01cac6fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fa01cba79ff in QInotifyFileSystemWatcherEngine::run (this=0x1882ca0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fa01cac9fcb in QThreadPrivate::start (arg=0x1882ca0) at thread/qthread_unix.cpp:298
#11 0x00007fa0144dce9a in start_thread (arg=0x7f9ffe636700) at pthread_create.c:308
#12 0x00007fa01fa264bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f9ff240a700 (LWP 1619)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fa0199ac222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fa0199ac259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fa0144dce9a in start_thread (arg=0x7f9ff240a700) at pthread_create.c:308
#4  0x00007fa01fa264bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f9feb975700 (LWP 1643)):
#0  0x00007fa01fa1ab03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa013bd7ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa013bd8124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa01cbf8426 in QEventDispatcherGlib::processEvents (this=0x7f9fe40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fa01cbc7c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fa01cbc7ed7 in QEventLoop::exec (this=0x7f9feb974dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fa01cac6fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fa01cba79ff in QInotifyFileSystemWatcherEngine::run (this=0x2bc1880) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fa01cac9fcb in QThreadPrivate::start (arg=0x2bc1880) at thread/qthread_unix.cpp:298
#9  0x00007fa0144dce9a in start_thread (arg=0x7f9feb975700) at pthread_create.c:308
#10 0x00007fa01fa264bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa020149780 (LWP 1554)):
[KCrash Handler]
#6  QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively (this=<optimized out>) at graphicsview/qgraphicsitem.cpp:5386
#7  0x00007fa01c534142 in update (rect=..., this=0x4ce9780) at graphicsview/qgraphicsitem.cpp:5693
#8  QGraphicsItem::update (this=0x4ce9780, rect=...) at graphicsview/qgraphicsitem.cpp:5686
#9  0x00007f9fda258afd in update (height=<optimized out>, width=<optimized out>, ay=<optimized out>, ax=<optimized out>, this=<optimized out>) at /usr/include/qt4/QtGui/qgraphicsitem.h:506
#10 meth_QGraphicsItem_update (sipSelf=<Applet at remote 0x65cc560>, sipArgs=(), sipKwds=0x0) at sipQtGuipart6.cpp:56014
#11 0x00007f9fdb683845 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#12 0x00007f9fdb64e605 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#13 0x00007f9fdb64e7bd in function_call () from /usr/lib/libpython2.7.so.1.0
#14 0x00007f9fdb732e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#15 0x00007f9fdb7171cf in instancemethod_call.8746 () from /usr/lib/libpython2.7.so.1.0
#16 0x00007f9fdb732e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#17 0x00007f9fdb7337d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#18 0x00007f9fda77bf80 in sip_api_invoke_slot (slot=<optimized out>, sigargs=()) at /build/buildd/sip4-4.13.2/siplib/qtlib.c:203
#19 0x00007f9fdab03396 in PyQtProxy::invokeSlot(qpycore_slot const&, void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#20 0x00007f9fdab03690 in PyQtProxy::unislot(void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#21 0x00007f9fdab03772 in PyQtProxy::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#22 0x00007fa01cbdd489 in QMetaObject::activate (sender=0x519fde0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3566
#23 0x00007f9fdaa4cf5f in sipQTimer::timerEvent (this=0x519fde0, a0=0x7fff90db8eb0) at sipQtCorepart2.cpp:148
#24 0x00007fa01cbe2179 in QObject::event (this=0x519fde0, e=<optimized out>) at kernel/qobject.cpp:1157
#25 0x00007f9fdaa4de5d in event (a0=0x7fff90db8eb0, this=0x519fde0) at sipQtCorepart2.cpp:165
#26 sipQTimer::event (this=0x519fde0, a0=0x7fff90db8eb0) at sipQtCorepart2.cpp:157
#27 0x00007fa01bf4b894 in notify_helper (e=0x7fff90db8eb0, receiver=0x519fde0, this=0x17909b0) at kernel/qapplication.cpp:4559
#28 QApplicationPrivate::notify_helper (this=0x17909b0, receiver=0x519fde0, e=0x7fff90db8eb0) at kernel/qapplication.cpp:4531
#29 0x00007fa01bf50713 in QApplication::notify (this=0x1773c90, receiver=0x519fde0, e=0x7fff90db8eb0) at kernel/qapplication.cpp:4420
#30 0x00007fa01d8a5b46 in KApplication::notify (this=0x1773c90, receiver=0x519fde0, event=0x7fff90db8eb0) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007fa01cbc8e9c in QCoreApplication::notifyInternal (this=0x1773c90, receiver=0x519fde0, event=0x7fff90db8eb0) at kernel/qcoreapplication.cpp:876
#32 0x00007fa01cbfa1f2 in sendEvent (event=0x7fff90db8eb0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QTimerInfoList::activateTimers (this=0x17957b0) at kernel/qeventdispatcher_unix.cpp:611
#34 0x00007fa01cbf7c0d in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:186
#35 timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:180
#36 0x00007fa01cbf7c31 in idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:233
#37 0x00007fa013bd7c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007fa013bd8060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007fa013bd8124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007fa01cbf83bf in QEventDispatcherGlib::processEvents (this=0x171ead0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#41 0x00007fa01bff3d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007fa01cbc7c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007fa01cbc7ed7 in QEventLoop::exec (this=0x7fff90db9120, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007fa01cbccf67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#45 0x00007fa01fd32a13 in kdemain (argc=1, argv=0x7fff90db9508) at ../../../../plasma/desktop/shell/main.cpp:120
#46 0x00007fa01f95576d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff90db9508, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff90db94f8) at libc-start.c:226
#47 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 278484.

Possible duplicates by query: bug 296725, bug 290546, bug 289616, bug 288732, bug 286395.

Reported using DrKonqi