Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
Adding the default panell to a new activity crashes

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fceb4f927a0 (LWP 1574))]

Thread 5 (Thread 0x7fce935da700 (LWP 1577)):
#0  __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x12b5a58) at pthread_mutex_unlock.c:290
#2  0x00007fcea8df7451 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fceb1a5df3e in QEventDispatcherGlib::processEvents (this=0x12b5080, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fceb1a31cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fceb1a31ef7 in QEventLoop::exec (this=0x7fce935d9db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fceb194927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fceb1a14cbf in QInotifyFileSystemWatcherEngine::run (this=0x12b4ab0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fceb194bd05 in QThreadPrivate::start (arg=0x12b4ab0) at thread/qthread_unix.cpp:331
#9  0x00007fcea9903efc in start_thread (arg=0x7fce935da700) at pthread_create.c:304
#10 0x00007fceb487889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fce88dcc700 (LWP 1581)):
#0  __pthread_mutex_lock (mutex=0x17ddb98) at pthread_mutex_lock.c:47
#1  0x00007fcea8df5e5d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcea8df6dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcea8df7429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fceb1a5df3e in QEventDispatcherGlib::processEvents (this=0x1723210, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fceb1a31cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fceb1a31ef7 in QEventLoop::exec (this=0x7fce88dcbdb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fceb194927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007fceb1a14cbf in QInotifyFileSystemWatcherEngine::run (this=0x17dc9e0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fceb194bd05 in QThreadPrivate::start (arg=0x17dc9e0) at thread/qthread_unix.cpp:331
#10 0x00007fcea9903efc in start_thread (arg=0x7fce88dcc700) at pthread_create.c:304
#11 0x00007fceb487889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fce86e10700 (LWP 1583)):
#0  0x00007fcea8df6f4a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcea8df7792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce878ee516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#3  0x00007fcea8e1c2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcea9903efc in start_thread (arg=0x7fce86e10700) at pthread_create.c:304
#5  0x00007fceb487889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fce87611700 (LWP 3643)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fceaea62fe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fceaea63019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fcea9903efc in start_thread (arg=0x7fce87611700) at pthread_create.c:304
#4  0x00007fceb487889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fceb4f927a0 (LWP 1574)):
[KCrash Handler]
#6  0x00007fceb13c4734 in QGraphicsLayoutItem::isLayout (this=0x5935b00) at graphicsview/qgraphicslayoutitem.cpp:868
#7  0x00007fceb13c36e2 in QGraphicsLayoutPrivate::activateRecursive (this=0x58b6a20, item=0x5935b00) at graphicsview/qgraphicslayout_p.cpp:181
#8  0x00007fceb13c3724 in QGraphicsLayoutPrivate::activateRecursive (this=0x58b6a20, item=0x58b4e60) at graphicsview/qgraphicslayout_p.cpp:194
#9  0x00007fceb13c30db in QGraphicsLayout::activate (this=0x58b4e60) at graphicsview/qgraphicslayout.cpp:261
#10 0x00007fceb13c3199 in QGraphicsLayout::widgetEvent (this=0x58b4e60, e=<optimized out>) at graphicsview/qgraphicslayout.cpp:389
#11 0x00007fceb140185a in QGraphicsWidget::event (this=<optimized out>, event=0x54b34c0) at graphicsview/qgraphicswidget.cpp:1379
#12 0x00007fceb0de3424 in notify_helper (e=0x54b34c0, receiver=0x58aef10, this=0x78feb0) at kernel/qapplication.cpp:4486
#13 QApplicationPrivate::notify_helper (this=0x78feb0, receiver=0x58aef10, e=0x54b34c0) at kernel/qapplication.cpp:4458
#14 0x00007fceb0de8291 in QApplication::notify (this=0x77f6d0, receiver=0x58aef10, e=0x54b34c0) at kernel/qapplication.cpp:4365
#15 0x00007fceb26e1126 in KApplication::notify (this=0x77f6d0, receiver=0x58aef10, event=0x54b34c0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007fceb1a32afc in QCoreApplication::notifyInternal (this=0x77f6d0, receiver=0x58aef10, event=0x54b34c0) at kernel/qcoreapplication.cpp:787
#17 0x00007fceb1a3651f in sendEvent (event=0x54b34c0, receiver=0x58aef10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x715430) at kernel/qcoreapplication.cpp:1428
#19 0x00007fceb1a5da73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#20 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#21 0x00007fcea8df6a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fcea8df7258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fcea8df7429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fceb1a5ded6 in QEventDispatcherGlib::processEvents (this=0x716f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007fceb0e8b07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007fceb1a31cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007fceb1a31ef7 in QEventLoop::exec (this=0x7fff1150f6c0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007fceb1a36789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007fceb4b771a3 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#30 0x00007fceb47b830d in __libc_start_main (main=0x400640, argc=1, ubp_av=0x7fff1150faa8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff1150fa98) at libc-start.c:226
#31 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 241685.

Possible duplicates by query: bug 289359, bug 289245, bug 288182, bug 287184, bug 286710.

Reported using DrKonqi