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

-- Information about the crash:
- What I was doing when the application crashed:
adding system tray, system crashed readded widgets could not add system tray widget crashed plasma

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fce0abcf7a0 (LWP 2660))]

Thread 4 (Thread 0x7fcdeb088700 (LWP 2661)):
#0  0x00007fcdffa05d9d in __pthread_mutex_unlock_usercnt (mutex=0x2967dd8) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x2967dd8) at pthread_mutex_unlock.c:290
#2  0x00007fcdfeef9094 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcdfeef9f9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcdfeefa639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fce076e6446 in QEventDispatcherGlib::processEvents (this=0x297bd20, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fce076ba882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fce076baabc in QEventLoop::exec (this=0x7fcdeb087db0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007fce075d1924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#9  0x00007fce0769cc2f in QInotifyFileSystemWatcherEngine::run (this=0x2961fd0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fce075d4175 in QThreadPrivate::start (arg=0x2961fd0) at thread/qthread_unix.cpp:320
#11 0x00007fcdffa01d8c in start_thread (arg=0x7fcdeb088700) at pthread_create.c:304
#12 0x00007fce0a4d704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fcde8611700 (LWP 2662)):
#0  0x00007fcdffa05d9d in __pthread_mutex_unlock_usercnt (mutex=0x2d4be38) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x2d4be38) at pthread_mutex_unlock.c:290
#2  0x00007fcdfeef9f19 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcdfeefa639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fce076e6446 in QEventDispatcherGlib::processEvents (this=0x2cdb770, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fce076ba882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fce076baabc in QEventLoop::exec (this=0x7fcde8610db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fce075d1924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007fce0769cc2f in QInotifyFileSystemWatcherEngine::run (this=0x2cd7e10) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fce075d4175 in QThreadPrivate::start (arg=0x2cd7e10) at thread/qthread_unix.cpp:320
#10 0x00007fcdffa01d8c in start_thread (arg=0x7fcde8611700) at pthread_create.c:304
#11 0x00007fce0a4d704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fcde2783700 (LWP 2670)):
#0  __pthread_mutex_lock (mutex=0x32b43b8) at pthread_mutex_lock.c:62
#1  0x00007fcdfeef90d3 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcdfeef9f9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcdfeefa9f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcde389ac44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007fcdfef213e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fcdffa01d8c in start_thread (arg=0x7fcde2783700) at pthread_create.c:304
#7  0x00007fce0a4d704d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fce0abcf7a0 (LWP 2660)):
[KCrash Handler]
#6  QGraphicsLayoutItemPrivate::hasHeightForWidth (this=0x740065006e002e) at graphicsview/qgraphicslayoutitem.cpp:280
#7  0x00007fce070a8581 in QGridLayoutItem::hasDynamicConstraint (this=0x4144980) at graphicsview/qgridlayoutengine.cpp:576
#8  0x00007fce070a9839 in QGridLayoutEngine::ensureDynamicConstraint (this=0x3a49f00) at graphicsview/qgridlayoutengine.cpp:1657
#9  0x00007fce070a98e9 in QGridLayoutEngine::hasDynamicConstraint (this=0x3a49f00) at graphicsview/qgridlayoutengine.cpp:1677
#10 0x00007fce070ad638 in QGridLayoutEngine::sizeHint (this=0x3a49f00, styleInfo=..., which=Qt::MaximumSize, constraint=...) at graphicsview/qgridlayoutengine.cpp:1134
#11 0x00007fce070382ca in QGraphicsGridLayout::sizeHint (this=<value optimized out>, which=Qt::MaximumSize, constraint=...) at graphicsview/qgraphicsgridlayout.cpp:656
#12 0x00007fce07062d68 in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x3a49df0, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:169
#13 0x00007fce07063651 in QGraphicsLayoutItem::effectiveSizeHint (this=<value optimized out>, which=<value optimized out>, constraint=<value optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#14 0x00007fce0709fb21 in QGraphicsWidget::sizeHint (this=<value optimized out>, which=<value optimized out>, constraint=<value optimized out>) at graphicsview/qgraphicswidget.cpp:729
#15 0x00007fce07062e4b in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x3a49d00, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:175
#16 0x00007fce07063651 in QGraphicsLayoutItem::effectiveSizeHint (this=<value optimized out>, which=<value optimized out>, constraint=<value optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#17 0x00007fcdf24ff065 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#18 0x00007fcdf2500f55 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#19 0x00007fcdf2501426 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#20 0x00007fcdf2501554 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#21 0x00007fce076d05f8 in QMetaObject::activate (sender=0x2514d60, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fffc4be8670) at kernel/qobject.cpp:3287
#22 0x00007fcdf24e475f in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#23 0x00007fcdf24e48cd in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#24 0x00007fcdf24e4a74 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#25 0x00007fce076d05f8 in QMetaObject::activate (sender=0x25148e0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fffc4be87f0) at kernel/qobject.cpp:3287
#26 0x00007fcdf24e506f in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#27 0x00007fcdf24ec385 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#28 0x00007fcdf24e45b6 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#29 0x00007fcdf24f6432 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#30 0x00007fcdf24f74bc in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#31 0x00007fce076cf49a in QObject::event (this=0x3a40bb0, e=<value optimized out>) at kernel/qobject.cpp:1226
#32 0x00007fce070a01bb in QGraphicsWidget::event (this=0x3a40bb0, event=0x413c890) at graphicsview/qgraphicswidget.cpp:1423
#33 0x00007fce06a789f4 in QApplicationPrivate::notify_helper (this=0x1f517d0, receiver=0x3a40bb0, e=0x413c890) at kernel/qapplication.cpp:4462
#34 0x00007fce06a7d3ba in QApplication::notify (this=<value optimized out>, receiver=0x3a40bb0, e=0x413c890) at kernel/qapplication.cpp:4341
#35 0x00007fce0835b796 in KApplication::notify (this=0x1f334d0, receiver=0x3a40bb0, event=0x413c890) at ../../kdeui/kernel/kapplication.cpp:311
#36 0x00007fce076bb49c in QCoreApplication::notifyInternal (this=0x1f334d0, receiver=0x3a40bb0, event=0x413c890) at kernel/qcoreapplication.cpp:731
#37 0x00007fce076bec25 in sendEvent (receiver=0x0, event_type=0, data=0x1eabb00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#38 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1eabb00) at kernel/qcoreapplication.cpp:1372
#39 0x00007fce076e6253 in sendPostedEvents (s=0x1f541c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#40 postEventSourceDispatch (s=0x1f541c0) at kernel/qeventdispatcher_glib.cpp:277
#41 0x00007fcdfeef9bcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007fcdfeefa3a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fcdfeefa639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007fce076e63ef in QEventDispatcherGlib::processEvents (this=0x1eab2e0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#45 0x00007fce06b224de in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#46 0x00007fce076ba882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#47 0x00007fce076baabc in QEventLoop::exec (this=0x7fffc4be9420, flags=...) at kernel/qeventloop.cpp:201
#48 0x00007fce076beecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#49 0x00007fce0a7c59dc in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#50 0x00007fce0a40feff in __libc_start_main (main=0x400740 <_start+256>, argc=1, ubp_av=0x7fffc4be9828, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffc4be9818) at libc-start.c:226
#51 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 277367.

Possible duplicates by query: bug 280549, bug 279478, bug 278947, bug 278282, bug 277367.

Reported using DrKonqi