Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.00
Qt Version: 4.8.2
Operating System: Linux 3.2.0-29-generic x86_64
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
This particular crash (see crash log) happened when VLC switched albums (I had it playing through the contents of my ~/Music directory), though it doesn't usually happen. I wasn't actually doing anything when the crash occurred, so I don't know what else might have precipitated it. Plasma crashes rather more consistently when I exit VLC. Note I have DBus integration in VLC enabled (so I can control it with the Play Control plasmoid).

Dr. Konqi flagged up a possible duplicate bug where resuming from suspend consistently causes Plasma to crash. I do experience that behaviour as well, so perhaps these issues have the same root cause on the Plasma side of things?

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0363695780 (LWP 2104))]

Thread 5 (Thread 0x7f03402d7700 (LWP 2376)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f035c962022 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f035c962059 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f03571e6e9a in start_thread (arg=0x7f03402d7700) at pthread_create.c:308
#4  0x00007f0362f814bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f02b826b700 (LWP 2666)):
#0  __libc_disable_asynccancel () at ../nptl/sysdeps/unix/sysv/linux/x86_64/cancellation.S:103
#1  0x00007f0362f75b17 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:89
#2  0x00007f0356aea036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0356aea164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f035fbaf9e6 in QEventDispatcherGlib::processEvents (this=0x7f02b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f035fb7ef22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f035fb7f177 in QEventLoop::exec (this=0x7f02b826add0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f035fa7e057 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00007f035fb5ec2f in QInotifyFileSystemWatcherEngine::run (this=0x9a5760) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f035fa8107b in QThreadPrivate::start (arg=0x9a5760) at thread/qthread_unix.cpp:307
#10 0x00007f03571e6e9a in start_thread (arg=0x7f02b826b700) at pthread_create.c:308
#11 0x00007f0362f814bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f02b6c91700 (LWP 2697)):
#0  0x00007f03571e8f69 in __pthread_mutex_lock (mutex=0x7f02a8000a60) at pthread_mutex_lock.c:92
#1  0x00007f0356b255a1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0356ae9851 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0356ae9f5b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0356aea164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f035fbaf9e6 in QEventDispatcherGlib::processEvents (this=0x7f02a80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f035fb7ef22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f035fb7f177 in QEventLoop::exec (this=0x7f02b6c90dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f035fa7e057 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f035fb5ec2f in QInotifyFileSystemWatcherEngine::run (this=0x1933bb0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f035fa8107b in QThreadPrivate::start (arg=0x1933bb0) at thread/qthread_unix.cpp:307
#11 0x00007f03571e6e9a in start_thread (arg=0x7f02b6c91700) at pthread_create.c:308
#12 0x00007f0362f814bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f02a37fe700 (LWP 3414)):
#0  0x00007f0362f75b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f0356aea036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0356aea49a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f02ac977406 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f0356b0b9e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f03571e6e9a in start_thread (arg=0x7f02a37fe700) at pthread_create.c:308
#6  0x00007f0362f814bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0363695780 (LWP 2104)):
[KCrash Handler]
#6  QVariant::userType (this=0x70) at kernel/qvariant.cpp:1784
#7  0x00007f03467ff2d2 in qvariant_cast<QDBusArgument> (v=...) at /usr/include/qt4/QtCore/qvariant.h:574
#8  value<QDBusArgument> (this=0x70) at /usr/include/qt4/QtCore/qvariant.h:333
#9  Registrar::slotLayoutUpdated (this=<optimized out>, parentId=<optimized out>) at /build/buildd/plasma-widget-menubar-0.1.17/src/registrar.cpp:173
#10 0x00007f03467f5d39 in qt_static_metacall (_a=0x7fff3139d380, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at /build/buildd/plasma-widget-menubar-0.1.17/obj-x86_64-linux-gnu/src/moc_registrar.cpp:76
#11 Registrar::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7fff3139d380) at /build/buildd/plasma-widget-menubar-0.1.17/obj-x86_64-linux-gnu/src/moc_registrar.cpp:61
#12 0x00007f03467f5dbb in Registrar::qt_metacall (this=0xb2fbe0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff3139d380) at /build/buildd/plasma-widget-menubar-0.1.17/obj-x86_64-linux-gnu/src/moc_registrar.cpp:117
#13 0x00007f035fefb37b in QDBusConnectionPrivate::deliverCall (this=0x888a10, object=0xb2fbe0, msg=..., metaTypes=..., slotIdx=11) at qdbusintegrator.cpp:947
#14 0x00007f035fb99a06 in QObject::event (this=0xb2fbe0, e=<optimized out>) at kernel/qobject.cpp:1195
#15 0x00007f035ef017b4 in notify_helper (e=0x4f535c0, receiver=0xb2fbe0, this=0x8a8da0) at kernel/qapplication.cpp:4556
#16 QApplicationPrivate::notify_helper (this=0x8a8da0, receiver=0xb2fbe0, e=0x4f535c0) at kernel/qapplication.cpp:4528
#17 0x00007f035ef06583 in QApplication::notify (this=0x888c30, receiver=0xb2fbe0, e=0x4f535c0) at kernel/qapplication.cpp:4417
#18 0x00007f0360863456 in KApplication::notify (this=0x888c30, receiver=0xb2fbe0, event=0x4f535c0) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f035fb803ec in QCoreApplication::notifyInternal (this=0x888c30, receiver=0xb2fbe0, event=0x4f535c0) at kernel/qcoreapplication.cpp:915
#20 0x00007f035fb841ca in sendEvent (event=0x4f535c0, receiver=0xb2fbe0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#21 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x82f1f0) at kernel/qcoreapplication.cpp:1539
#22 0x00007f035fbaf553 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#23 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#24 0x00007f0356ae9d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f0356aea0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f0356aea164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f035fbaf97f in QEventDispatcherGlib::processEvents (this=0x830ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#28 0x00007f035efa9cde in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f035fb7ef22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f035fb7f177 in QEventLoop::exec (this=0x7fff3139dd10, flags=...) at kernel/qeventloop.cpp:204
#31 0x00007f035fb844c7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#32 0x00007f0363287ba3 in kdemain (argc=1, argv=0x7fff3139e0f8) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x00007f0362eb076d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff3139e0f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3139e0e8) at libc-start.c:226
#34 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 301549.

Possible duplicates by query: bug 303745, bug 301549, bug 282308.

Reported using DrKonqi