Application: plasma-desktop (0.3)
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-28-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
i was watching the output of htop in the konsole.
plasma-desktop suddenly jumped to 99% cpu, stayed like that for 30 seconds and then crashed.
no mouse movment.

- Unusual behavior I noticed:
machine had become slow due to lack of cpu, several times in the previous 5 mins, so i was checking htop to see what was hogging the CPU.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd284cc27a0 (LWP 2074))]

Thread 2 (Thread 0x7fd25abbc700 (LWP 2102)):
#0  0x00007fd281c8a387 in timerSourceCheck (source=0x2dbd1d0) at kernel/qeventdispatcher_glib.cpp:175
#1  0x00007fd2791be66a in g_main_context_check () from /lib/libglib-2.0.so.0
#2  0x00007fd2791bf023 in ?? () from /lib/libglib-2.0.so.0
#3  0x00007fd2791bf45c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#4  0x00007fd281c8a1e6 in QEventDispatcherGlib::processEvents (this=0x2dbd400, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007fd281c5ca02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fd281c5cdec in QEventLoop::exec (this=0x7fd25abbbcb0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fd281b672fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007fd281c3c5f8 in QInotifyFileSystemWatcherEngine::run (this=0x2dbc980) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fd281b6a27e in QThreadPrivate::start (arg=0x2dbc980) at thread/qthread_unix.cpp:266
#10 0x00007fd27c81c953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fd2818df971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fd2845e192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd284cc27a0 (LWP 2074)):
[KCrash Handler]
#6  QString (this=0x47bc720) at /usr/include/qt4/QtCore/qstring.h:727
#7  Plasma::Service::destination (this=0x47bc720) at ../../plasma/service.cpp:199
#8  0x00007fd262aec537 in ?? () from /usr/lib/pymodules/python2.6/PyKDE4/plasma.so
#9  0x00007fd26460fb70 in call_function (f=0x4881690, throwflag=<value optimized out>) at ../Python/ceval.c:3750
#10 PyEval_EvalFrameEx (f=0x4881690, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#11 0x00007fd264610468 in fast_function (f=0x477af90, throwflag=<value optimized out>) at ../Python/ceval.c:3836
#12 call_function (f=0x477af90, throwflag=<value optimized out>) at ../Python/ceval.c:3771
#13 PyEval_EvalFrameEx (f=0x477af90, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#14 0x00007fd264610468 in fast_function (f=0x477adc0, throwflag=<value optimized out>) at ../Python/ceval.c:3836
#15 call_function (f=0x477adc0, throwflag=<value optimized out>) at ../Python/ceval.c:3771
#16 PyEval_EvalFrameEx (f=0x477adc0, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#17 0x00007fd264610468 in fast_function (f=0x48afe90, throwflag=<value optimized out>) at ../Python/ceval.c:3836
#18 call_function (f=0x48afe90, throwflag=<value optimized out>) at ../Python/ceval.c:3771
#19 PyEval_EvalFrameEx (f=0x48afe90, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#20 0x00007fd264610468 in fast_function (f=0x4792300, throwflag=<value optimized out>) at ../Python/ceval.c:3836
#21 call_function (f=0x4792300, throwflag=<value optimized out>) at ../Python/ceval.c:3771
#22 PyEval_EvalFrameEx (f=0x4792300, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#23 0x00007fd2646118b0 in PyEval_EvalCodeEx (co=0x36225d0, globals=<value optimized out>, locals=<value optimized out>, args=0x4, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3000
#24 0x00007fd26459772d in function_call (func=0x3624848, arg=0x33fd158, kw=0x3e17d70) at ../Objects/funcobject.c:524
#25 0x00007fd264569bb3 in PyObject_Call (func=0x3624848, arg=0x47bc720, kw=0x0) at ../Objects/abstract.c:2492
#26 0x00007fd26460e49f in ext_do_call (f=0x3b35060, throwflag=<value optimized out>) at ../Python/ceval.c:4063
#27 PyEval_EvalFrameEx (f=0x3b35060, throwflag=<value optimized out>) at ../Python/ceval.c:2452
#28 0x00007fd264610468 in fast_function (f=0x30c2a50, throwflag=<value optimized out>) at ../Python/ceval.c:3836
#29 call_function (f=0x30c2a50, throwflag=<value optimized out>) at ../Python/ceval.c:3771
#30 PyEval_EvalFrameEx (f=0x30c2a50, throwflag=<value optimized out>) at ../Python/ceval.c:2412
#31 0x00007fd2646118b0 in PyEval_EvalCodeEx (co=0x368a198, globals=<value optimized out>, locals=<value optimized out>, args=0x2, argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3000
#32 0x00007fd264597630 in function_call (func=0x3698410, arg=0x39c2050, kw=0x0) at ../Objects/funcobject.c:524
#33 0x00007fd264569bb3 in PyObject_Call (func=0x3698410, arg=0x47bc720, kw=0x0) at ../Objects/abstract.c:2492
#34 0x00007fd26457b5bf in instancemethod_call (func=0x3698410, arg=0x39c2050, kw=0x0) at ../Objects/classobject.c:2579
#35 0x00007fd264569bb3 in PyObject_Call (func=0x333e9b0, arg=0x47bc720, kw=0x0) at ../Objects/abstract.c:2492
#36 0x00007fd26456dd26 in PyObject_CallFunctionObjArgs (callable=0x333e9b0) at ../Objects/abstract.c:2723
#37 0x00007fd2531c5c7b in ?? () from /usr/lib/pymodules/python2.6/_dbus_bindings.so
#38 0x00007fd2531c67f2 in ?? () from /usr/lib/pymodules/python2.6/_dbus_bindings.so
#39 0x00007fd2741b5446 in dbus_connection_dispatch () from /lib/libdbus-1.so.3
#40 0x00007fd252daa414 in ?? () from /usr/lib/pymodules/python2.6/dbus/mainloop/qt.so
#41 0x00007fd252daa51d in ?? () from /usr/lib/pymodules/python2.6/dbus/mainloop/qt.so
#42 0x00007fd252daabb4 in ?? () from /usr/lib/pymodules/python2.6/dbus/mainloop/qt.so
#43 0x00007fd281c75b27 in QMetaObject::activate (sender=0x3669360, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3280
#44 0x00007fd281cc1b1e in QSocketNotifier::activated (this=0x21fce90, _t1=19) at .moc/release-shared/moc_qsocketnotifier.cpp:89
#45 0x00007fd281c7a653 in QSocketNotifier::event (this=0x3669360, e=0x7fff3d360770) at kernel/qsocketnotifier.cpp:317
#46 0x00007fd280da7fdc in QApplicationPrivate::notify_helper (this=0x1d87700, receiver=0x3669360, e=0x7fff3d360770) at kernel/qapplication.cpp:4396
#47 0x00007fd280dadaed in QApplication::notify (this=0x1d74cd0, receiver=0x3669360, e=0x7fff3d360770) at kernel/qapplication.cpp:4277
#48 0x00007fd2828f9156 in KApplication::notify (this=0x1d74cd0, receiver=0x3669360, event=0x7fff3d360770) at ../../kdeui/kernel/kapplication.cpp:310
#49 0x00007fd281c5dcdc in QCoreApplication::notifyInternal (this=0x1d74cd0, receiver=0x3669360, event=0x7fff3d360770) at kernel/qcoreapplication.cpp:732
#50 0x00007fd281c8a54a in sendEvent (source=0x1d8aee0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#51 socketNotifierSourceDispatch (source=0x1d8aee0) at kernel/qeventdispatcher_glib.cpp:110
#52 0x00007fd2791bb342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#53 0x00007fd2791bf2a8 in ?? () from /lib/libglib-2.0.so.0
#54 0x00007fd2791bf45c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#55 0x00007fd281c8a193 in QEventDispatcherGlib::processEvents (this=0x1d1e070, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415
#56 0x00007fd280e5aa4e in QGuiEventDispatcherGlib::processEvents (this=0x21fce90, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#57 0x00007fd281c5ca02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#58 0x00007fd281c5cdec in QEventLoop::exec (this=0x7fff3d3609d0, flags=) at kernel/qeventloop.cpp:201
#59 0x00007fd281c60ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#60 0x00007fd2848b8a56 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/desktop/shell/main.cpp:118
#61 0x00007fd284519d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff3d360d98) at libc-start.c:226
#62 0x0000000000400669 in _start ()

Reported using DrKonqi