Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.00 (4.7.0)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-11-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
I can't remember any strang things when this happened. I was creating tables in MySQL Administrator then shut down my machine and Plasma Desktop crashes on startup. Last thing I changed in desktop was adding a shelf widget to a tabbing group widget in one of desktops.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe87daba7a0 (LWP 2630))]

Thread 3 (Thread 0x7fe85be19700 (LWP 2631)):
#0  0x00007fe87d3aef03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe871dded94 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe871ddf2c9 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe87a5cb446 in QEventDispatcherGlib::processEvents (this=0x13e0e20, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fe87a59f882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fe87a59fabc in QEventLoop::exec (this=0x7fe85be18db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fe87a4b6924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007fe87a581c2f in QInotifyFileSystemWatcherEngine::run (this=0x13df790) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fe87a4b9175 in QThreadPrivate::start (arg=0x13df790) at thread/qthread_unix.cpp:320
#9  0x00007fe8728e6d8c in start_thread (arg=0x7fe85be19700) at pthread_create.c:304
#10 0x00007fe87d3bc04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fe850529700 (LWP 2636)):
#0  0x00007fe87d3aef03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe871dded94 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe871ddf682 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe851640b24 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe871e06076 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe8728e6d8c in start_thread (arg=0x7fe850529700) at pthread_create.c:304
#6  0x00007fe87d3bc04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe87daba7a0 (LWP 2630)):
[KCrash Handler]
#6  findChar (str=0x6000000000000000, len=60565, ch=..., from=0, cs=Qt::CaseSensitive) at tools/qstring.cpp:318
#7  0x00007fe879983e52 in QKeySequence::mnemonic (text=...) at kernel/qkeysequence.cpp:1094
#8  0x00007fe879dc55a6 in QTabBar::insertTab (this=0xd3a790, index=0, icon=<value optimized out>, text=...) at widgets/qtabbar.cpp:848
#9  0x00007fe87cfca117 in Plasma::TabBar::insertTab (this=0xd36cf0, index=-1, icon=..., label=..., content=<value optimized out>) at ../../plasma/widgets/tabbar.cpp:310
#10 0x00007fe87cfca2fe in Plasma::TabBar::insertTab (this=0xd36cf0, index=-1, label=..., content=0xce5530) at ../../plasma/widgets/tabbar.cpp:319
#11 0x00007fe865744394 in TabbingGroup::restoreChildGroupInfo (this=0xd39b30, child=0xce5510, group=<value optimized out>) at ../../../../containments/groupingdesktop/lib/groups/tabbinggroup.cpp:154
#12 0x00007fe86572714f in AbstractGroup::restoreChildren (this=0xd39b30) at ../../../../containments/groupingdesktop/lib/abstractgroup.cpp:615
#13 0x00007fe86574424d in TabbingGroup::restoreChildren (this=0xd39b30) at ../../../../containments/groupingdesktop/lib/groups/tabbinggroup.cpp:140
#14 0x00007fe865724c04 in AbstractGroupPrivate::restoreChildren (this=0xd32df0) at ../../../../containments/groupingdesktop/lib/abstractgroup.cpp:187
#15 0x00007fe86572fe2e in GroupingContainmentPrivate::restoreGroups (this=0xc4a360) at ../../../../containments/groupingdesktop/lib/groupingcontainment.cpp:508
#16 0x00007fe8657306ca in GroupingContainment::qt_metacall (this=0xc349b0, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xf16cd0) at ./groupingcontainment.moc:127
#17 0x00007fe87a5b449a in QObject::event (this=0xc349b0, e=<value optimized out>) at kernel/qobject.cpp:1226
#18 0x00007fe879f851bb in QGraphicsWidget::event (this=0xc349b0, event=0xf31ca0) at graphicsview/qgraphicswidget.cpp:1423
#19 0x00007fe87995d9f4 in QApplicationPrivate::notify_helper (this=0x7ac330, receiver=0xc349b0, e=0xf31ca0) at kernel/qapplication.cpp:4462
#20 0x00007fe8799623ba in QApplication::notify (this=<value optimized out>, receiver=0xc349b0, e=0xf31ca0) at kernel/qapplication.cpp:4341
#21 0x00007fe87b240796 in KApplication::notify (this=0x79a990, receiver=0xc349b0, event=0xf31ca0) at ../../kdeui/kernel/kapplication.cpp:311
#22 0x00007fe87a5a049c in QCoreApplication::notifyInternal (this=0x79a990, receiver=0xc349b0, event=0xf31ca0) at kernel/qcoreapplication.cpp:731
#23 0x00007fe87a5a3c25 in sendEvent (receiver=0x0, event_type=0, data=0x70cb00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x70cb00) at kernel/qcoreapplication.cpp:1372
#25 0x00007fe87a5cb253 in sendPostedEvents (s=0x7b46c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#26 postEventSourceDispatch (s=0x7b46c0) at kernel/qeventdispatcher_glib.cpp:277
#27 0x00007fe871dde85d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fe871ddf038 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fe871ddf2c9 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fe87a5cb3ef in QEventDispatcherGlib::processEvents (this=0x70c2e0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#31 0x00007fe879a074de in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#32 0x00007fe87a59f882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#33 0x00007fe87a59fabc in QEventLoop::exec (this=0x7fff8fddff80, flags=...) at kernel/qeventloop.cpp:201
#34 0x00007fe87a5a3ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#35 0x00007fe87d6aa9dc in kdemain (argc=1, argv=0x7fff8fde0388) at ../../../../plasma/desktop/shell/main.cpp:120
#36 0x00007fe87d2f4eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff8fde0388, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff8fde0378) at libc-start.c:226
#37 0x0000000000400669 in _start ()

Reported using DrKonqi