Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic i686
Distribution: Ubuntu 11.04

-- Information about the crash:
Click on Cashew plasmoid.
Select "Add Widgets".
Select "Show Desktop" plasmoid.
Drag and drop onto Task Manager.
Plasma Desktop crashes with segfault.

Frash install of Ubuntu 11.04 with KDE SC 4.6.2 Desktop also installed.
This bug is reproducible every time.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb607c720 (LWP 21347))]

Thread 3 (Thread 0xae65fb70 (LWP 21351)):
#0  0x05792d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x043b9dd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x044864f2 in updateCurrentTime (this=0xb3b01abc, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0xb3b01abc, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x04484d32 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xae65f0cc) at kernel/qeventdispatcher_glib.cpp:136
#6  0x04484dcd in timerSourcePrepare (source=0xb3b01a88, timeout=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x03505fd4 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x03506e63 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x03507524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x04485577 in QEventDispatcherGlib::processEvents (this=0xb3b00468, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x04457289 in QEventLoop::processEvents (this=0xae65f280, flags=...) at kernel/qeventloop.cpp:149
#12 0x04457522 in QEventLoop::exec (this=0xae65f280, flags=...) at kernel/qeventloop.cpp:201
#13 0x043612a0 in QThread::exec (this=0x834dd08) at thread/qthread.cpp:492
#14 0x04438fdb in QInotifyFileSystemWatcherEngine::run (this=0x834dd08) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x04363da2 in QThreadPrivate::start (arg=0x834dd08) at thread/qthread_unix.cpp:320
#16 0x079dee99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x0068073e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xad65db70 (LWP 21353)):
#0  0x00a45416 in __kernel_vsyscall ()
#1  0x079e348c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x0068e3fd in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x0741d817 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x75311c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x0741d851 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x75311c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x079dee99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x0068073e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb607c720 (LWP 21347)):
[KCrash Handler]
#7  QMutex::lock (this=0xb9ac2c2) at thread/qmutex.cpp:151
#8  0x0445b1b0 in QCoreApplication::postEvent (receiver=0x9b3a288, event=0x9a41ff0, priority=0) at kernel/qcoreapplication.cpp:1140
#9  0x0445b4cc in QCoreApplication::postEvent (receiver=0x9b3a288, event=0x9a41ff0) at kernel/qcoreapplication.cpp:1093
#10 0x0446a2a4 in QObject::deleteLater (this=0x9b3a288) at kernel/qobject.cpp:2138
#11 0x0272bf10 in QX11Data::xdndHandleFinished (this=0x82b2510, xe=0xbfcc91bc, passive=false) at kernel/qdnd_x11.cpp:1254
#12 0x0271d996 in QApplication::x11ClientMessage (this=0x82a5948, w=0x8782710, event=0xbfcc91bc, passive_only=false) at kernel/qapplication_x11.cpp:3192
#13 0x0271b97d in QApplication::x11ProcessEvent (this=0x82a5948, event=0xbfcc91bc) at kernel/qapplication_x11.cpp:3817
#14 0x02746b84 in x11EventSourceDispatch (s=0x82b6de8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#15 0x03506aa8 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#16 0x03507270 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#17 0x03507524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#18 0x0448553c in QEventDispatcherGlib::processEvents (this=0x8238aa8, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#19 0x02746775 in QGuiEventDispatcherGlib::processEvents (this=0x8238aa8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#20 0x04457289 in QEventLoop::processEvents (this=0xbfcc9484, flags=...) at kernel/qeventloop.cpp:149
#21 0x04457522 in QEventLoop::exec (this=0xbfcc9484, flags=...) at kernel/qeventloop.cpp:201
#22 0x0445becc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#23 0x026908e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#24 0x008995a5 in kdemain (argc=1, argv=0xbfcc9694) at ../../../../plasma/desktop/shell/main.cpp:118
#25 0x080485cb in main (argc=1, argv=0xbfcc9694) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 271539, bug 270993, bug 270912, bug 270898, bug 270197.

Reported using DrKonqi