Bug 291780

Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Logging back into a locked desktop causes plasma to crash. It doesn't appear to happen every time, but it's often enough to be a problem.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f5b20c567a0 (LWP 1998))]

Thread 6 (Thread 0x7f5afd92c700 (LWP 2000)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f5afd92bad0 in ?? ()
#2  0x00007fff8d5247e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 5 (Thread 0x7f5afafaa700 (LWP 2001)):
#0  0x00007f5b1d726f40 in QEventDispatcherGlib::processEvents (this=0x15a9090, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:423
#1  0x00007f5b1d6facf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#2  0x00007f5b1d6faef7 in QEventLoop::exec (this=0x7f5afafa9db0, flags=...) at kernel/qeventloop.cpp:201
#3  0x00007f5b1d61227f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#4  0x00007f5b1d6ddcbf in QInotifyFileSystemWatcherEngine::run (this=0x15a4840) at io/qfilesystemwatcher_inotify.cpp:248
#5  0x00007f5b1d614d05 in QThreadPrivate::start (arg=0x15a4840) at thread/qthread_unix.cpp:331
#6  0x00007f5b155ccefc in start_thread (arg=0x7f5afafaa700) at pthread_create.c:304
#7  0x00007f5b2054189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f5af521e700 (LWP 2009)):
#0  0x00007f5b20535773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f5b14abff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5b14ac0792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5af5cfc516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f5b14ae52b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5b155ccefc in start_thread (arg=0x7f5af521e700) at pthread_create.c:304
#6  0x00007f5b2054189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5af4a1d700 (LWP 2010)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f5b1bbcec2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f5b1bbced59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f5b155ccefc in start_thread (arg=0x7f5af4a1d700) at pthread_create.c:304
#4  0x00007f5b2054189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f5aeffff700 (LWP 2011)):
#0  0x00007f5b14abf393 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5b14abfe6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5b14ac0429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5b1d726f3e in QEventDispatcherGlib::processEvents (this=0x1b70bf0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f5b1d6facf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5b1d6faef7 in QEventLoop::exec (this=0x7f5aefffede0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f5b1d61227f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f5b1d614d05 in QThreadPrivate::start (arg=0x1b6dbf0) at thread/qthread_unix.cpp:331
#8  0x00007f5b155ccefc in start_thread (arg=0x7f5aeffff700) at pthread_create.c:304
#9  0x00007f5b2054189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5b20c567a0 (LWP 1998)):
[KCrash Handler]
#6  isNull (this=0x1b8e810) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x1b8e810) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x27d3e50) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f5b06e9e112 in WindowTaskItem::publishIconGeometry (this=0x136c650) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f5b06eacb7c in AbstractTaskItem::timerEvent (this=0x136c650, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f5b1d712789 in QObject::event (this=0x136c650, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f5b1d0ca89b in QGraphicsWidget::event (this=0x136c650, event=0x7fff8d481d60) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f5b1caac424 in notify_helper (e=0x7fff8d481d60, receiver=0x136c650, this=0x9e4e30) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x9e4e30, receiver=0x136c650, e=0x7fff8d481d60) at kernel/qapplication.cpp:4458
#15 0x00007f5b1cab1291 in QApplication::notify (this=0x9d8280, receiver=0x136c650, e=0x7fff8d481d60) at kernel/qapplication.cpp:4365
#16 0x00007f5b1e3aa126 in KApplication::notify (this=0x9d8280, receiver=0x136c650, event=0x7fff8d481d60) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f5b1d6fbafc in QCoreApplication::notifyInternal (this=0x9d8280, receiver=0x136c650, event=0x7fff8d481d60) at kernel/qcoreapplication.cpp:787
#18 0x00007f5b1d728d62 in sendEvent (event=0x7fff8d481d60, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x9eaeb0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f5b1d726538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f5b14abfa5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f5b14ac0258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f5b14ac0429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f5b1d726ed6 in QEventDispatcherGlib::processEvents (this=0x978f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f5b1cb5407e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f5b1d6facf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f5b1d6faef7 in QEventLoop::exec (this=0x7fff8d481ff0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f5b1d6ff789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f5b208401a3 in kdemain (argc=1, argv=0x7fff8d4823d8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f5b2048130d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff8d4823d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff8d4823c8) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291755, bug 291689, bug 291680, bug 291679, bug 291664.

Reported using DrKonqi