Bug 351616

Application: plasmashell (5.3.95)

Qt Version: 5.4.2
Operating System: Linux 4.1.0-3-generic x86_64
Distribution: Ubuntu Wily Werewolf (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Just started firefox and plasmashell crashed. No other program was started after system was started.

-- Backtrace:
Application: Плазма (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8d0009d800 (LWP 2135))]

Thread 9 (Thread 0x7f8ceb5b2700 (LWP 2137)):
#0  0x00007f8cfa8798dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8cfe893bd2 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8cfe89574f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8ced8fe9e9 in QXcbEventReader::run() (this=0x26446a0) at qxcbconnection.cpp:1105
#4  0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x26446a0) at thread/qthread_unix.cpp:337
#5  0x00007f8cfa05b6aa in start_thread (arg=0x7f8ceb5b2700) at pthread_create.c:333
#6  0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f8ce8f31700 (LWP 2178)):
#0  0x00007f8cfaf6348a in QMutex::lock() (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x2725cf8: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  0x00007f8cfaf6348a in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x2725cf8: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  0x00007f8cfaf6348a in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x2725cf8, this@entry=0x1) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:270
#3  0x00007f8cfaf6348a in QMutex::lock() (current=<synthetic pointer>, this=0x2725cf8, this@entry=0x1) at thread/qmutex.h:82
#4  0x00007f8cfaf6348a in QMutex::lock() (this=this@entry=0x2725cf8) at thread/qmutex.cpp:212
#5  0x00007f8cfb1a139f in postEventSourcePrepare(GSource*, gint*) (m=0x2725cf8, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  0x00007f8cfb1a139f in postEventSourcePrepare(GSource*, gint*) (this=0x2725cd0) at ../../include/QtCore/5.4.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#7  0x00007f8cfb1a139f in postEventSourcePrepare(GSource*, gint*) (s=0x7f8cdc0012d0, timeout=timeout@entry=0x7f8ce8f30be4) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007f8cf76227cd in g_main_context_prepare (context=context@entry=0x7f8cdc000990, priority=priority@entry=0x7f8ce8f30c70) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3410
#9  0x00007f8cf76231b8 in g_main_context_iterate (context=context@entry=0x7f8cdc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3788
#10 0x00007f8cf762339c in g_main_context_iteration (context=0x7f8cdc000990, may_block=may_block@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3869
#11 0x00007f8cfb1a1e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8cdc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#12 0x00007f8cfb1482da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8ce8f30da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#13 0x00007f8cfaf66374 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#14 0x00007f8cfd763f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x2726d40) at thread/qthread_unix.cpp:337
#16 0x00007f8cfa05b6aa in start_thread (arg=0x7f8ce8f31700) at pthread_create.c:333
#17 0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f8ce12f5700 (LWP 2184)):
#0  0x00007f8cfa060da0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8ce25af4ea in radeon_drm_cs_emit_ioctl (mtx=0x28ab280, cond=0x28ab2a8) at ../../../../../../../include/c11/threads_posix.h:154
#2  0x00007f8ce25af4ea in radeon_drm_cs_emit_ioctl (sema=0x28ab280) at ../../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  0x00007f8ce25af4ea in radeon_drm_cs_emit_ioctl (param=param@entry=0x28aaf50) at ../../../../../../../src/gallium/winsys/radeon/drm/radeon_drm_winsys.c:636
#4  0x00007f8ce25aec57 in impl_thrd_routine (p=<optimized out>) at ../../../../../../../include/c11/threads_posix.h:87
#5  0x00007f8cfa05b6aa in start_thread (arg=0x7f8ce12f5700) at pthread_create.c:333
#6  0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f8cd6a67700 (LWP 2185)):
#0  0x00007f8cf76227d9 in g_main_context_prepare (context=context@entry=0x7f8cd0000990, priority=priority@entry=0x7f8cd6a66c70) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3421
#1  0x00007f8cf76231b8 in g_main_context_iterate (context=context@entry=0x7f8cd0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3788
#2  0x00007f8cf762339c in g_main_context_iteration (context=0x7f8cd0000990, may_block=may_block@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3869
#3  0x00007f8cfb1a1e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8cd00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f8cfb1482da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8cd6a66da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f8cfaf66374 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f8cfd763f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x299c730) at thread/qthread_unix.cpp:337
#8  0x00007f8cfa05b6aa in start_thread (arg=0x7f8cd6a67700) at pthread_create.c:333
#9  0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f8ccffff700 (LWP 2220)):
#0  0x00007f8cfa8798dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8cf762328c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8cc4003070, timeout=-1, context=0x7f8cc4000990) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:4103
#2  0x00007f8cf762328c in g_main_context_iterate (context=context@entry=0x7f8cc4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3803
#3  0x00007f8cf762339c in g_main_context_iteration (context=0x7f8cc4000990, may_block=may_block@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3869
#4  0x00007f8cfb1a1e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8cc40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f8cfb1482da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8ccfffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8cfaf66374 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f8cfd763f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x265c1b0) at thread/qthread_unix.cpp:337
#9  0x00007f8cfa05b6aa in start_thread (arg=0x7f8ccffff700) at pthread_create.c:333
#10 0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f8cce7bb700 (LWP 2222)):
#0  0x00007f8cfa060da0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8cffaf1114 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f8cffaf1159 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f8cfa05b6aa in start_thread (arg=0x7f8cce7bb700) at pthread_create.c:333
#4  0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f8c43df9700 (LWP 2242)):
#0  0x00007f8cfa8798dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8cf762328c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8c3c002f30, timeout=-1, context=0x7f8c3c000990) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:4103
#2  0x00007f8cf762328c in g_main_context_iterate (context=context@entry=0x7f8c3c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3803
#3  0x00007f8cf762339c in g_main_context_iteration (context=0x7f8c3c000990, may_block=may_block@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3869
#4  0x00007f8cfb1a1e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8c3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f8cfb1482da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8c43df8d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f8cfaf66374 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f8cfe0dee66 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x2d560f0) at thread/qthread_unix.cpp:337
#9  0x00007f8cfa05b6aa in start_thread (arg=0x7f8c43df9700) at pthread_create.c:333
#10 0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f8c33d5c700 (LWP 2426)):
#0  0x00007f8cfa87549d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8cf7666740 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f8c33d5bb80, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f8cf7666740 in g_wakeup_acknowledge (wakeup=0x7f8c3c002360) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gwakeup.c:210
#3  0x00007f8cf7622d3c in g_main_context_check (context=context@entry=0x7f8c2c000990, max_priority=2147483647, fds=fds@entry=0x7f8c2c004cc0, n_fds=n_fds@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3600
#4  0x00007f8cf7623230 in g_main_context_iterate (context=context@entry=0x7f8c2c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3805
#5  0x00007f8cf762339c in g_main_context_iteration (context=0x7f8c2c000990, may_block=may_block@entry=1) at /build/glib2.0-AGBGtY/glib2.0-2.45.4/./glib/gmain.c:3869
#6  0x00007f8cfb1a1e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f8c2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#7  0x00007f8cfb1482da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f8c33d5bd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007f8cfaf66374 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#9  0x00007f8c35ff8cf7 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#10 0x00007f8cfaf6b25e in QThreadPrivate::start(void*) (arg=0x3691060) at thread/qthread_unix.cpp:337
#11 0x00007f8cfa05b6aa in start_thread (arg=0x7f8c33d5c700) at pthread_create.c:333
#12 0x00007f8cfa884eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f8d0009d800 (LWP 2135)):
[KCrash Handler]
#6  0x00007f8cfd6d98a3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8cfd6cf65c in QQmlEnginePrivate::typeCategory(int) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f8cfd7227fb in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f8cfd722c3b in QQmlPropertyCache::resolve(QQmlPropertyData*) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f8cfd722c64 in QQmlPropertyCache::ensureResolved(QQmlPropertyData*) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f8cfd722e8e in QQmlPropertyCache::findProperty(QStringHash<QPair<int, QQmlPropertyData*> >::ConstIterator, QQmlVMEMetaObject const*, QQmlContextData*) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f8cfd6a937c in QV4::QObjectWrapper::findProperty(QV4::ExecutionEngine*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QQmlPropertyData*) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f8cfd6b0524 in QV4::QObjectWrapper::getQmlProperty(QV4::ExecutionContext*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f8cfd6b0a11 in QV4::QObjectWrapper::get(QV4::Managed*, QV4::String*, bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f8cfd6b9387 in QV4::Runtime::getProperty(QV4::ExecutionContext*, QV4::ValueRef, QV4::String*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f8ccc0c3124 in  ()
#17 0x0000000000000000 in  ()

Reported using DrKonqi