Bug 224538

Application: plasma-desktop (0.3)
KDE Platform Version: 4.3.95 (KDE 4.3.95 (KDE 4.4 RC2))
Qt Version: 4.6.0
Operating System: Linux 2.6.31-18-generic i686
Distribution: Ubuntu 9.10

-- Information about the crash:
My Kmail had frozen. I killed it, then Plasma crashed.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Plasma-Arbeitsfläche (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77ce760 (LWP 2285))]

Thread 4 (Thread 0xab3c8b70 (LWP 2286)):
#0  0x005b6422 in __kernel_vsyscall ()
#1  0x003b8e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x00b63307 in QWaitConditionPrivate::wait (this=0x86c5680, mutex=0x86c567c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#3  QWaitCondition::wait (this=0x86c5680, mutex=0x86c567c, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#4  0x03bea102 in QHostInfoAgent::run (this=0x86c5670) at kernel/qhostinfo.cpp:252
#5  0x00b623ae in QThreadPrivate::start (arg=0x86c5670) at thread/qthread_unix.cpp:244
#6  0x003b480e in start_thread (arg=0xab3c8b70) at pthread_create.c:300
#7  0x06abd8de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 3 (Thread 0xaa39ab70 (LWP 2297)):
#0  0x005b6422 in __kernel_vsyscall ()
#1  0x003b8e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0xb68a20d7 in WTF::TCMalloc_PageHeap::scavengerThread (this=0xb7675ec0) at ../JavaScriptCore/wtf/FastMalloc.cpp:2299
#3  0xb68a2121 in WTF::TCMalloc_PageHeap::runScavengerThread (context=0xb7675ec0) at ../JavaScriptCore/wtf/FastMalloc.cpp:1433
#4  0x003b480e in start_thread (arg=0xaa39ab70) at pthread_create.c:300
#5  0x06abd8de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0xa98c8b70 (LWP 2797)):
#0  0x005b6422 in __kernel_vsyscall ()
#1  0x003b8e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x05a8fbb7 in WTF::TCMalloc_PageHeap::scavengerThread (this=0x5b691a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2304
#3  0x05a8fc01 in WTF::TCMalloc_PageHeap::runScavengerThread (context=0x5b691a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1438
#4  0x003b480e in start_thread (arg=0xa98c8b70) at pthread_create.c:300
#5  0x06abd8de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb77ce760 (LWP 2285)):
[KCrash Handler]
#6  QListData::isEmpty (this=0x8430ba8, item=0x8f71cd0, dirtyAncestorContainsChildren=false, parentOpacity=1) at ../../include/QtCore/../../src/corelib/tools/qlist.h:91
#7  QList<QGraphicsItem*>::isEmpty (this=0x8430ba8, item=0x8f71cd0, dirtyAncestorContainsChildren=false, parentOpacity=1) at ../../include/QtCore/../../src/corelib/tools/qlist.h:134
#8  QGraphicsScenePrivate::processDirtyItemsRecursive (this=0x8430ba8, item=0x8f71cd0, dirtyAncestorContainsChildren=false, parentOpacity=1) at graphicsview/qgraphicsscene.cpp:4907
#9  0x0357beed in QGraphicsScenePrivate::_q_processDirtyItems (this=0x8430ba8) at graphicsview/qgraphicsscene.cpp:466
#10 0x0357c4f6 in QGraphicsScene::qt_metacall (this=0x84588d8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x8f2bfb8) at .moc/release-shared/moc_qgraphicsscene.cpp:130
#11 0x0159d68a in Plasma::Corona::qt_metacall (this=0x84588d8, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0x8f2bfb8) at ./corona.moc:107
#12 0x013125aa in DesktopCorona::qt_metacall (this=0x84588d8, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0x8f2bfb8) at ./desktopcorona.moc:78
#13 0x00c6911a in QMetaObject::metacall (object=0x84588d8, cl=500697337, idx=18, argv=0x8f2bfb8) at kernel/qmetaobject.cpp:237
#14 0x00c73856 in QMetaCallEvent::placeMetaCall (this=0x95a6220, object=0x84588d8) at kernel/qobject.cpp:574
#15 0x00c748ae in QObject::event (this=0x84588d8, e=0x95a6220) at kernel/qobject.cpp:1260
#16 0x035781c4 in QGraphicsScene::event (this=0x84588d8, event=0x95a6220) at graphicsview/qgraphicsscene.cpp:3450
#17 0x02ed319c in QApplicationPrivate::notify_helper (this=0x8386478, receiver=0x84588d8, e=0x95a6220) at kernel/qapplication.cpp:4242
#18 0x02ed9df7 in QApplication::notify (this=0x83803e8, receiver=0x84588d8, e=0x95a6220) at kernel/qapplication.cpp:3661
#19 0x01005a1a in KApplication::notify (this=0x83803e8, receiver=0x84588d8, event=0x95a6220) at ../../kdeui/kernel/kapplication.cpp:302
#20 0x00c63eab in QCoreApplication::notifyInternal (this=0x83803e8, receiver=0x84588d8, event=0x95a6220) at kernel/qcoreapplication.cpp:704
#21 0x00c668e3 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x83330d8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x83330d8) at kernel/qcoreapplication.cpp:1345
#23 0x00c66a4d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#24 0x00c900df in QCoreApplication::sendPostedEvents (s=0x83884a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#25 postEventSourceDispatch (s=0x83884a0) at kernel/qeventdispatcher_glib.cpp:276
#26 0x01451e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x01455730 in ?? () from /lib/libglib-2.0.so.0
#28 0x01455863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00c8fbd5 in QEventDispatcherGlib::processEvents (this=0x8386268, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#30 0x02f90b75 in QGuiEventDispatcherGlib::processEvents (this=0x8386268, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00c624c9 in QEventLoop::processEvents (this=0xbfec4c74, flags=) at kernel/qeventloop.cpp:149
#32 0x00c6291a in QEventLoop::exec (this=0xbfec4c74, flags=...) at kernel/qeventloop.cpp:201
#33 0x00c66b0f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x02ed3237 in QApplication::exec () at kernel/qapplication.cpp:3570
#35 0x0131a1ee in kdemain (argc=1, argv=0x8377e58) at ../../../../plasma/desktop/shell/main.cpp:112
#36 0x0804dff7 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x8356f90 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051429 "0") at ../../kinit/kinit.cpp:706
#37 0x0804ec15 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1198
#38 0x0804f08c in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1391
#39 0x0804fe27 in main (argc=4, argv=0xbfec5724, envp=0xbfec5738) at ../../kinit/kinit.cpp:1830

Reported using DrKonqi