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:
- What I was doing when the application crashed:

I have Win7 running in VirtualBox. It can be put into frameless mode. In my case, I then have the Windows taskbar at the top of the screen.

Plasma crashed when I choose frameless mode.

-- Backtrace:
Application: Plasma desktop-skal (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8fa17327a0 (LWP 1952))]

Thread 5 (Thread 0x7f8f7d531700 (LWP 1953)):
#0  0x00007f8f960b21fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x1fae1d8) at pthread_mutex_unlock.c:290
#2  0x00007f8f955a0fe4 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f955a1dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f955a2429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f9e208f3e in QEventDispatcherGlib::processEvents (this=0x1fae1b0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f8f9e1dccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f8f9e1dcef7 in QEventLoop::exec (this=0x7f8f7d530db0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f8f9e0f427f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f8f9e1bfcbf in QInotifyFileSystemWatcherEngine::run (this=0x1fad580) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f8f9e0f6d05 in QThreadPrivate::start (arg=0x1fad580) at thread/qthread_unix.cpp:331
#11 0x00007f8f960aeefc in start_thread (arg=0x7f8f7d531700) at pthread_create.c:304
#12 0x00007f8fa102389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f8f7c904700 (LWP 1954)):
#0  0x00007f8fa1017773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8f955a1f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f955a2429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f9e208f3e in QEventDispatcherGlib::processEvents (this=0x1fecd00, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8f9e1dccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f8f9e1dcef7 in QEventLoop::exec (this=0x7f8f7c903db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f8f9e0f427f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f8f9e1bfcbf in QInotifyFileSystemWatcherEngine::run (this=0x1fe8e60) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f8f9e0f6d05 in QThreadPrivate::start (arg=0x1fe8e60) at thread/qthread_unix.cpp:331
#9  0x00007f8f960aeefc in start_thread (arg=0x7f8f7c904700) at pthread_create.c:304
#10 0x00007f8fa102389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f8f757d0700 (LWP 1960)):
#0  0x00007f8fa1017773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8f955a1f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f955a2792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f762ae516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f8f955c72b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f960aeefc in start_thread (arg=0x7f8f757d0700) at pthread_create.c:304
#6  0x00007f8fa102389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8f7197a700 (LWP 2281)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8f9b20dfe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f8f9b20e019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f8f960aeefc in start_thread (arg=0x7f8f7197a700) at pthread_create.c:304
#4  0x00007f8fa102389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8fa17327a0 (LWP 1952)):
[KCrash Handler]
#6  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x16cbb40) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f8f87cf6112 in WindowTaskItem::publishIconGeometry (this=0x2f06620) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f8f87d04b7c in AbstractTaskItem::timerEvent (this=0x2f06620, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f8f9e1f4789 in QObject::event (this=0x2f06620, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f8f9dbac89b in QGraphicsWidget::event (this=0x2f06620, event=0x7fff6d6d05f0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f8f9d58e424 in notify_helper (e=0x7fff6d6d05f0, receiver=0x2f06620, this=0x153ae30) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x153ae30, receiver=0x2f06620, e=0x7fff6d6d05f0) at kernel/qapplication.cpp:4458
#15 0x00007f8f9d593291 in QApplication::notify (this=0x15345d0, receiver=0x2f06620, e=0x7fff6d6d05f0) at kernel/qapplication.cpp:4365
#16 0x00007f8f9ee8c126 in KApplication::notify (this=0x15345d0, receiver=0x2f06620, event=0x7fff6d6d05f0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f8f9e1ddafc in QCoreApplication::notifyInternal (this=0x15345d0, receiver=0x2f06620, event=0x7fff6d6d05f0) at kernel/qcoreapplication.cpp:787
#18 0x00007f8f9e20ad62 in sendEvent (event=0x7fff6d6d05f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x153dba0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f8f9e208538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f8f955a1a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f8f955a2258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f8f955a2429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f8f9e208ed6 in QEventDispatcherGlib::processEvents (this=0x14bcf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f8f9d63607e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f8f9e1dccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f8f9e1dcef7 in QEventLoop::exec (this=0x7fff6d6d0880, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f8f9e1e1789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f8fa13221a3 in kdemain (argc=1, argv=0x7fff6d6d0c68) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f8fa0f6330d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff6d6d0c68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff6d6d0c58) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290677, bug 290674, bug 290672, bug 290664, bug 290654.

Reported using DrKonqi