Application: plasmashell (5.4.1)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-9-generic x86_64
Distribution: Ubuntu Wily Werewolf (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
using ctrl-c it sometimes happens when I do this but not always
Especially when I am using lyx, it seems to be more frequent

-- 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 0x7f20a96a4800 (LWP 21970))]

Thread 8 (Thread 0x7f2094bc4700 (LWP 21972)):
#0  0x00007f20a3e908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f20a7eaabd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f20a7eac74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f2096f0e9e9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20a36726aa in start_thread (arg=0x7f2094bc4700) at pthread_create.c:333
#6  0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f20880d8700 (LWP 21976)):
#0  0x00007f20a3e8c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f20a0c7e7f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20a0c3ad14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20a0c3b1d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f20a47b8e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f20a457d374 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f20a6d7af85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f20a36726aa in start_thread (arg=0x7f20880d8700) at pthread_create.c:333
#11 0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f207c207700 (LWP 21977)):
#0  0x00007f20a0c38263 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f20a0c3a75b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20a0c3b15b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f20a47b8e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20a457d374 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f20a6d7af85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f20a36726aa in start_thread (arg=0x7f207c207700) at pthread_create.c:333
#10 0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f207993e700 (LWP 21981)):
#0  0x00007f20a3e908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f20a0c3b22c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20a47b8e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20a457d374 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20a6d7af85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f20a36726aa in start_thread (arg=0x7f207993e700) at pthread_create.c:333
#9  0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f206bdf7700 (LWP 21982)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f20a9108114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f20a9108159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f20a36726aa in start_thread (arg=0x7f206bdf7700) at pthread_create.c:333
#4  0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f1fe86d2700 (LWP 21983)):
#0  0x00007f20a457a8af in QMutex::unlock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f20a47b83b1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f20a0c3a7bd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20a0c3b15b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f20a47b8e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f20a457d374 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f20a76f5ef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f20a36726aa in start_thread (arg=0x7f1fe86d2700) at pthread_create.c:333
#11 0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f1fd73e1700 (LWP 21986)):
#0  0x00007f20a3e908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f20a0c3b22c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f20a47b8e1b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f20a457d374 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1fd83e16b7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f20a458225e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f20a36726aa in start_thread (arg=0x7f1fd73e1700) at pthread_create.c:333
#9  0x00007f20a3e9beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f20a96a4800 (LWP 21970)):
[KCrash Handler]
#6  brw_meta_fast_clear (brw=brw@entry=0x27eefe8, fb=fb@entry=0x6d98650, buffers=buffers@entry=34, partial_clear=partial_clear@entry=false) at ../../../../../../../src/mesa/drivers/dri/i965/brw_meta_fast_clear.c:446
#7  0x00007f2084ed906c in brw_clear (ctx=0x27eefe8, mask=34) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:246
#8  0x00007f20a772837a in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f20a772cb3a in QSGBatchRenderer::Renderer::render() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f20a7737a1c in QSGRenderer::renderScene(QSGBindable const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f20a7737e9b in QSGRenderer::renderScene(unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f20a77465be in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f20a779020c in QQuickWindowPrivate::renderSceneGraph(QSize const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f20a7760bac in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f20a77616d1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f20a523fb8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f20a5245230 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f20a4761a9b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f20a47b7c1d in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f20a47b8159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f20a0c3b037 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f20a0c3b290 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f20a0c3b33c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f20a47b8dff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f20a475f2da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f20a4766e4c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00000000004322c3 in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 352505, bug 352496, bug 352467, bug 352456, bug 352439.

Reported using DrKonqi