Application: plasmashell (5.4.0)

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:
I am using the desktop normally... Suddenly, the system crash and restart over... Do not kick me off from desktop, but the the task manager desapper and restart..

- Unusual behavior I noticed:
Occured at least 10 times in one day

The crash can be reproduced every time.

-- 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 0x7faf63c5d800 (LWP 3531))]

Thread 9 (Thread 0x7faf6114b700 (LWP 3537)):
#0  0x00007faf63d46176 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007faf63d47035 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faf540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faf6114ada0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007faf64aebf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x000000300eaa225e in QThreadPrivate::start (arg=0x9f14d0) at thread/qthread_unix.cpp:337
#8  0x0000003000c076aa in start_thread (arg=0x7faf6114b700) at pthread_create.c:333
#9  0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7faf52fe6700 (LWP 3538)):
#0  0x00007ffd9e532c55 in clock_gettime ()
#1  0x000000300051538d in __GI___clock_gettime (clock_id=<optimized out>, tp=tp@entry=0x7faf52fe5b10) at ../sysdeps/unix/clock_gettime.c:115
#2  0x000000300eb53346 in qt_clock_gettime (ts=0x7faf52fe5b10, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x000000300ecd68a9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7faf4c002cd0) at kernel/qtimerinfo_unix.cpp:84
#6  0x000000300ecd6e15 in QTimerInfoList::timerWait (this=0x7faf4c002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x000000300ecd81fe in timerSourcePrepareHelper (timeout=0x7faf52fe5be4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7faf52fe5be4) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007faf63d4670d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007faf63d470ab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faf4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faf52fe5da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007faf64aebf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x000000300eaa225e in QThreadPrivate::start (arg=0x16037d0) at thread/qthread_unix.cpp:337
#17 0x0000003000c076aa in start_thread (arg=0x7faf52fe6700) at pthread_create.c:333
#18 0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7faf50b7c700 (LWP 3542)):
#0  0x00007faf63d8bbb4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007faf63d4702d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faf480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faf50b7bda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007faf64aebf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x000000300eaa225e in QThreadPrivate::start (arg=0x1757d60) at thread/qthread_unix.cpp:337
#8  0x0000003000c076aa in start_thread (arg=0x7faf50b7c700) at pthread_create.c:333
#9  0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7faf431c4700 (LWP 3543)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x000000307657e114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x000000307657e159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x0000003000c076aa in start_thread (arg=0x7faf431c4700) at pthread_create.c:333
#4  0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7faec1045700 (LWP 3544)):
#0  0x00000030004f749d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007faf63d8a810 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf63d46c64 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faf63d47120 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faebc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faec1044da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007faf50071035 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#9  0x000000300eaa225e in QThreadPrivate::start (arg=0x19add40) at thread/qthread_unix.cpp:337
#10 0x0000003000c076aa in start_thread (arg=0x7faec1045700) at pthread_create.c:333
#11 0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7faebb771700 (LWP 3546)):
#0  0x00007faf63d46a6e in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007faf63d47120 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faeb4003ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faebb770d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007faf64d35e66 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x000000300eaa225e in QThreadPrivate::start (arg=0x1c1eeb0) at thread/qthread_unix.cpp:337
#8  0x0000003000c076aa in start_thread (arg=0x7faebb771700) at pthread_create.c:333
#9  0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7faebaf49700 (LWP 3571)):
#0  0x00007faf63d44224 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007faf63d46ada in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faf63d47120 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7faeac00d960, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7faebaf48d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007faeb29da6b7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x000000300eaa225e in QThreadPrivate::start (arg=0x3a9ac30) at thread/qthread_unix.cpp:337
#9  0x0000003000c076aa in start_thread (arg=0x7faebaf49700) at pthread_create.c:333
#10 0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fae9bfff700 (LWP 3896)):
#0  0x00007ffd9e532c55 in clock_gettime ()
#1  0x000000300051538d in __GI___clock_gettime (clock_id=<optimized out>, tp=tp@entry=0x7fae9bffeb30) at ../sysdeps/unix/clock_gettime.c:115
#2  0x000000300eb53346 in qt_clock_gettime (ts=0x7fae9bffeb30, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x000000300ecd68a9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7fae90002ad0) at kernel/qtimerinfo_unix.cpp:84
#6  0x000000300ecd6e15 in QTimerInfoList::timerWait (this=0x7fae90002ad0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x000000300ecd81fe in timerSourcePrepareHelper (timeout=0x7fae9bffec04, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7fae9bffec04) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007faf63d4670d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007faf63d470ab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x000000300ecd8e1b in QEventDispatcherGlib::processEvents (this=0x7fae900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7fae9bffedc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x000000300ea9d374 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x000000300eaa225e in QThreadPrivate::start (arg=0x50da370) at thread/qthread_unix.cpp:337
#16 0x0000003000c076aa in start_thread (arg=0x7fae9bfff700) at pthread_create.c:333
#17 0x0000003000506eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7faf63c5d800 (LWP 3531)):
[KCrash Handler]
#6  brw_meta_fast_clear (brw=brw@entry=0x1e25058, fb=fb@entry=0x4f1f2e0, buffers=buffers@entry=34, partial_clear=partial_clear@entry=false) at ../../../../../../../src/mesa/drivers/dri/i965/brw_meta_fast_clear.c:446
#7  0x00007faf5b35406c in brw_clear (ctx=0x1e25058, mask=34) at ../../../../../../../src/mesa/drivers/dri/i965/brw_clear.c:246
#8  0x00007faf64d6839a in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007faf64d6cb5a in QSGBatchRenderer::Renderer::render() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007faf64d77a3c in QSGRenderer::renderScene(QSGBindable const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007faf64d77ebb in QSGRenderer::renderScene(unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007faf64d865de in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007faf64dd022c in QQuickWindowPrivate::renderSceneGraph(QSize const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007faf64da0bcc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007faf64da16f1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x0000003016b59b8c in QApplicationPrivate::notify_helper (this=this@entry=0x910780, receiver=receiver@entry=0x13154d0, e=e@entry=0x7ffd9e4a0ce0) at kernel/qapplication.cpp:3720
#17 0x0000003016b5f230 in QApplication::notify (this=0x7ffd9e4a10a0, receiver=0x13154d0, e=0x7ffd9e4a0ce0) at kernel/qapplication.cpp:3503
#18 0x000000300ec81a9b in QCoreApplication::notifyInternal (this=0x7ffd9e4a10a0, receiver=0x13154d0, event=event@entry=0x7ffd9e4a0ce0) at kernel/qcoreapplication.cpp:935
#19 0x000000300ecd7c1d in QCoreApplication::sendEvent (event=0x7ffd9e4a0ce0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#20 QTimerInfoList::activateTimers (this=0x946100) at kernel/qtimerinfo_unix.cpp:635
#21 0x000000300ecd8121 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#22 0x00007faf63d46f87 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007faf63d471e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007faf63d4728c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x000000300ecd8dff in QEventDispatcherGlib::processEvents (this=0x94d8c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#26 0x000000300ec7f2da in QEventLoop::exec (this=this@entry=0x7ffd9e4a0f20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#27 0x000000300ec86e4c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#28 0x0000003011ee009c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#29 0x0000003016b56025 in QApplication::exec () at kernel/qapplication.cpp:2956
#30 0x0000000000432063 in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 351933, bug 350842, bug 350835, bug 350701, bug 350678.

Reported using DrKonqi