Bug 360546

Application: plasmashell (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.4.5-040405-lowlatency x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:

I had just changed virtual desktop and was opening the K menu.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4ba7d4a800 (LWP 18630))]

Thread 7 (Thread 0x7f4b93271700 (LWP 18635)):
#0  0x00007f4ba245c88d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4ba652abd2 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4ba652c74f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4b953ba7e9 in QXcbEventReader::run() (this=0x25db850) at qxcbconnection.cpp:1229
#4  0x00007f4ba2b52a6e in QThreadPrivate::start(void*) (arg=0x25db850) at thread/qthread_unix.cpp:331
#5  0x00007f4ba1c3e6aa in start_thread (arg=0x7f4b93271700) at pthread_create.c:333
#6  0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4b85148700 (LWP 18656)):
#0  0x00007f4b9f237884 in g_mutex_unlock (mutex=0x7f4b80000990) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gthread-posix.c:1350
#1  0x00007f4b9f1f3306 in g_main_context_iteration (context=0x7f4b80000990, may_block=may_block@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3902
#2  0x00007f4ba2d8a50b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4b800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#3  0x00007f4ba2d3150a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4b85147da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007f4ba2b4dac4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007f4ba53fbc35 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f4ba2b52a6e in QThreadPrivate::start(void*) (arg=0x283c9d0) at thread/qthread_unix.cpp:331
#7  0x00007f4ba1c3e6aa in start_thread (arg=0x7f4b85148700) at pthread_create.c:333
#8  0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4b79c8b700 (LWP 18668)):
#0  0x00007f4ba2b4abba in QMutex::lock() (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x282bb68: 0x1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  0x00007f4ba2b4abba in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x282bb68: 0x1) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  0x00007f4ba2b4abba in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x282bb68, this@entry=0x29) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:278
#3  0x00007f4ba2b4abba in QMutex::lock() (current=<synthetic pointer>, this=0x282bb68, this@entry=0x29) at thread/qmutex.h:82
#4  0x00007f4ba2b4abba in QMutex::lock() (this=this@entry=0x282bb68) at thread/qmutex.cpp:212
#5  0x00007f4ba2d89d69 in postEventSourceCheck(GSource*) (m=0x282bb68, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  0x00007f4ba2d89d69 in postEventSourceCheck(GSource*) (this=0x282bb40) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#7  0x00007f4ba2d89d69 in postEventSourceCheck(GSource*) (timeout=<synthetic pointer>, s=0x7f4b740012d0) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007f4ba2d89d69 in postEventSourceCheck(GSource*) (source=0x7f4b740012d0) at kernel/qeventdispatcher_glib.cpp:264
#9  0x00007f4b9f1f2c21 in g_main_context_check (context=context@entry=0x7f4b74000990, max_priority=2147483647, fds=fds@entry=0x7f4b74003270, n_fds=n_fds@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3681
#10 0x00007f4b9f1f3190 in g_main_context_iterate (context=context@entry=0x7f4b74000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3837
#11 0x00007f4b9f1f32fc in g_main_context_iteration (context=0x7f4b74000990, may_block=may_block@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3901
#12 0x00007f4ba2d8a50b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4b740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x00007f4ba2d3150a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4b79c8ada0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f4ba2b4dac4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f4ba53fbc35 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f4ba2b52a6e in QThreadPrivate::start(void*) (arg=0x2ad3d30) at thread/qthread_unix.cpp:331
#17 0x00007f4ba1c3e6aa in start_thread (arg=0x7f4b79c8b700) at pthread_create.c:333
#18 0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4b73ba6700 (LWP 18669)):
#0  0x00007f4ba245c88d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4b9f1f31ec in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f4b6c003070, timeout=<optimized out>, context=0x7f4b6c000990) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:4135
#2  0x00007f4b9f1f31ec in g_main_context_iterate (context=context@entry=0x7f4b6c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3835
#3  0x00007f4b9f1f32fc in g_main_context_iteration (context=0x7f4b6c000990, may_block=may_block@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3901
#4  0x00007f4ba2d8a50b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4b6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4ba2d3150a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4b73ba5da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4ba2b4dac4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f4ba53fbc35 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4ba2b52a6e in QThreadPrivate::start(void*) (arg=0x2be6d50) at thread/qthread_unix.cpp:331
#9  0x00007f4ba1c3e6aa in start_thread (arg=0x7f4b73ba6700) at pthread_create.c:333
#10 0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4b72362700 (LWP 18788)):
#0  0x00007f4ba1c43da0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4ba77a4194 in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f4ba788cee0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f4ba77a41d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f4ba1c3e6aa in start_thread (arg=0x7f4b72362700) at pthread_create.c:333
#4  0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4aeb929700 (LWP 18908)):
#0  0x00007f4b9f237869 in g_mutex_lock (mutex=mutex@entry=0x7f4ae4000990) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gthread-posix.c:1338
#1  0x00007f4b9f1f31ae in g_main_context_iterate (context=context@entry=0x7f4ae4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3844
#2  0x00007f4b9f1f32fc in g_main_context_iteration (context=0x7f4ae4000990, may_block=may_block@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3901
#3  0x00007f4ba2d8a50b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4ae40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4ba2d3150a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4aeb928d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4ba2b4dac4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4ba5d842a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f4ba2b52a6e in QThreadPrivate::start(void*) (arg=0x2df4730) at thread/qthread_unix.cpp:331
#8  0x00007f4ba1c3e6aa in start_thread (arg=0x7f4aeb929700) at pthread_create.c:333
#9  0x00007f4ba2467e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4ba7d4a800 (LWP 18630)):
[KCrash Handler]
#6  0x00007f4b7e96c22c in brw_meta_fast_clear (brw=brw@entry=0x2f16f08, fb=fb@entry=0x5a1f490, buffers=buffers@entry=34, partial_clear=partial_clear@entry=false) at ../../../../../../../src/mesa/drivers/dri/i965/brw_meta_fast_clear.c:451
#7  0x00007f4b7e8f7dcc in brw_clear (ctx=0x2f16f08, mask=34) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:247
#8  0x00007f4ba5db47da in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f4ba5dba1c2 in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f4ba5dc5ebf in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f4ba5dc670b in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f4ba5dd6c0e in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f4ba5e20beb in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f4ba5df15bb in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f4ba5df2ec6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f4ba307f3a5 in QWindow::event(QEvent*) (this=0x519c830, ev=<optimized out>) at kernel/qwindow.cpp:2054
#17 0x00007f4ba5e2c441 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f4ba78d531b in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#19 0x00007f4ba38389dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x25c4540, receiver=receiver@entry=0x519c830, e=e@entry=0x7ffc4061ccc0) at kernel/qapplication.cpp:3716
#20 0x00007f4ba383dea6 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc4061d0e0, receiver=0x519c830, e=0x7ffc4061ccc0) at kernel/qapplication.cpp:3499
#21 0x00007f4ba2d33d7b in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffc4061d0e0, receiver=receiver@entry=0x519c830, event=event@entry=0x7ffc4061ccc0) at kernel/qcoreapplication.cpp:965
#22 0x00007f4ba30775bc in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (event=0x7ffc4061ccc0, receiver=0x519c830) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#23 0x00007f4ba30775bc in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (e=0x5d70580) at kernel/qguiapplication.cpp:2651
#24 0x00007f4ba307832d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) (e=e@entry=0x5d70580) at kernel/qguiapplication.cpp:1646
#25 0x00007f4ba305c228 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=...) at kernel/qwindowsysteminterface.cpp:625
#26 0x00007f4b953ec0b0 in userEventSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#27 0x00007f4b9f1f2ff7 in g_main_context_dispatch (context=0x2607ac0) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3154
#28 0x00007f4b9f1f2ff7 in g_main_context_dispatch (context=context@entry=0x2607ac0) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3769
#29 0x00007f4b9f1f3250 in g_main_context_iterate (context=context@entry=0x2607ac0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3840
#30 0x00007f4b9f1f32fc in g_main_context_iteration (context=0x2607ac0, may_block=may_block@entry=1) at /build/glib2.0-meArNm/glib2.0-2.46.2/./glib/gmain.c:3901
#31 0x00007f4ba2d8a4ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x25ba560, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#32 0x00007f4ba2d3150a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffc4061cf80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#33 0x00007f4ba2d395ec in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#34 0x00007f4ba306dd1c in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1530
#35 0x00007f4ba3834e15 in QApplication::exec() () at kernel/qapplication.cpp:2976
#36 0x000000000043258a in main(int, char**) (argc=2, argv=<optimized out>) at ../../shell/main.cpp:181

Possible duplicates by query: bug 359885, bug 359696, bug 359432, bug 359395, bug 359123.

Reported using DrKonqi