Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.2
Operating System: Linux 2.6.27.21-170.2.56.fc10.x86_64 x86_64
Distribution: "Fedora release 10 (Cambridge)"

What I was doing when the application crashed:
Plasma crashes after closing all windows in group but one, so the group transforms to normal task button.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fa4a719b820 (LWP 23743))]

Thread 2 (Thread 0x7fa48ff03950 (LWP 23746)):
#0  0x000000330c60b309 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fa4a92cf5b9 in QWaitCondition::wait () from /usr/lib64/libQtCore.so.4
#2  0x00007fa4ab6baf3c in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x00007fa4a92ce5d5 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x000000330c6073da in start_thread () from /lib64/libpthread.so.0
#5  0x000000330bae62bd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fa4a719b820 (LWP 23743)):
[KCrash Handler]
#5  0x00007fa491d381a6 in TaskManager::GroupManager::manualSortingRequest () from /usr/lib64/libtaskmanager.so.4
#6  0x00007fa491d3655a in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib64/libtaskmanager.so.4
#7  0x00007fa491d3d838 in ?? () from /usr/lib64/libtaskmanager.so.4
#8  0x00007fa491d3e6bd in ?? () from /usr/lib64/libtaskmanager.so.4
#9  0x00007fa4a93ccf32 in QMetaObject::activate () from /usr/lib64/libQtCore.so.4
#10 0x00007fa491d4f572 in TaskManager::TaskGroup::itemRemoved () from /usr/lib64/libtaskmanager.so.4
#11 0x00007fa491d4fe91 in TaskManager::TaskGroup::remove () from /usr/lib64/libtaskmanager.so.4
#12 0x00007fa491d5009f in TaskManager::TaskGroup::add () from /usr/lib64/libtaskmanager.so.4
#13 0x00007fa491d38a32 in ?? () from /usr/lib64/libtaskmanager.so.4
#14 0x00007fa491d39071 in ?? () from /usr/lib64/libtaskmanager.so.4
#15 0x00007fa491d3aeb2 in TaskManager::GroupManager::qt_metacall () from /usr/lib64/libtaskmanager.so.4
#16 0x00007fa4a93ccf32 in QMetaObject::activate () from /usr/lib64/libQtCore.so.4
#17 0x00007fa4a93c7d43 in QObject::event () from /usr/lib64/libQtCore.so.4
#18 0x00007fa4a9aab80d in QApplicationPrivate::notify_helper () from /usr/lib64/libQtGui.so.4
#19 0x00007fa4a9ab3a7a in QApplication::notify () from /usr/lib64/libQtGui.so.4
#20 0x00007fa4aaff4a9b in KApplication::notify () from /usr/lib64/libkdeui.so.5
#21 0x00007fa4a93b803c in QCoreApplication::notifyInternal () from /usr/lib64/libQtCore.so.4
#22 0x00007fa4a93e4ff9 in ?? () from /usr/lib64/libQtCore.so.4
#23 0x00007fa4a93e160d in ?? () from /usr/lib64/libQtCore.so.4
#24 0x000000330e6377bb in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#25 0x000000330e63af8d in ?? () from /lib64/libglib-2.0.so.0
#26 0x000000330e63b14b in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#27 0x00007fa4a93e156f in QEventDispatcherGlib::processEvents () from /usr/lib64/libQtCore.so.4
#28 0x00007fa4a9b42c5f in ?? () from /usr/lib64/libQtGui.so.4
#29 0x00007fa4a93b68d2 in QEventLoop::processEvents () from /usr/lib64/libQtCore.so.4
#30 0x00007fa4a93b6ca4 in QEventLoop::exec () from /usr/lib64/libQtCore.so.4
#31 0x00007fa4a93b8f74 in QCoreApplication::exec () from /usr/lib64/libQtCore.so.4
#32 0x00007fa4ac9b0d5b in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#33 0x000000330ba1e576 in __libc_start_main () from /lib64/libc.so.6
#34 0x0000000000400779 in _start ()

This bug may be a duplicate of or related to bug 197717

Reported using DrKonqi