Bug 354305

Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-16-generic x86_64
Distribution: Ubuntu 15.10

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

I have a dual monitor setup. I just logged in to find the bottom bar was still the color of the load screen, in a few seconds plasmashell crashed.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f1384e03800 (LWP 3015))]

Thread 7 (Thread 0x7f136e988700 (LWP 3018)):
#0  0x00007f137f5ac8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f13835f3bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f13835f574f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f137151da39 in QXcbEventReader::run (this=0x11055e0) at qxcbconnection.cpp:1105
#4  0x00007f137fc9f2be in QThreadPrivate::start (arg=0x11055e0) at thread/qthread_unix.cpp:337
#5  0x00007f137ed8e6aa in start_thread (arg=0x7f136e988700) at pthread_create.c:333
#6  0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f1367fff700 (LWP 3021)):
#0  0x00007f137f5ac8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f137c3591ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f137c3592fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f137fed629b in QEventDispatcherGlib::processEvents (this=0x7f13600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f137fe7c75a in QEventLoop::exec (this=this@entry=0x7f1367ffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f137fc9a3d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f13824c2f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f137fc9f2be in QThreadPrivate::start (arg=0x1216660) at thread/qthread_unix.cpp:337
#8  0x00007f137ed8e6aa in start_thread (arg=0x7f1367fff700) at pthread_create.c:333
#9  0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f135d967700 (LWP 3022)):
#0  0x00007ffe5b72ac4f in clock_gettime ()
#1  0x00007f137f5c638d in __GI___clock_gettime (clock_id=<optimized out>, tp=tp@entry=0x7f135d966b10) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f137fd503a6 in qt_clock_gettime (ts=0x7f135d966b10, 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  0x00007f137fed3d29 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f1358002cd0) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f137fed4295 in QTimerInfoList::timerWait (this=0x7f1358002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f137fed567e in timerSourcePrepareHelper (timeout=0x7f135d966be4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f135d966be4) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007f137c35877d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f137c35911b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f137c3592fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f137fed629b in QEventDispatcherGlib::processEvents (this=0x7f13580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x00007f137fe7c75a in QEventLoop::exec (this=this@entry=0x7f135d966da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f137fc9a3d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f13824c2f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f137fc9f2be in QThreadPrivate::start (arg=0x13ac8d0) at thread/qthread_unix.cpp:337
#17 0x00007f137ed8e6aa in start_thread (arg=0x7f135d967700) at pthread_create.c:333
#18 0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f1357060700 (LWP 3026)):
#0  0x00007ffe5b72ac4f in clock_gettime ()
#1  0x00007f137f5c638d in __GI___clock_gettime (clock_id=<optimized out>, tp=tp@entry=0x7f135705fb10) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f137fd503a6 in qt_clock_gettime (ts=0x7f135705fb10, 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  0x00007f137fed3d29 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f1348002ed0) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f137fed4295 in QTimerInfoList::timerWait (this=0x7f1348002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f137fed567e in timerSourcePrepareHelper (timeout=0x7f135705fbe4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f135705fbe4) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007f137c35877d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f137c35911b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f137c3592fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f137fed629b in QEventDispatcherGlib::processEvents (this=0x7f13480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x00007f137fe7c75a in QEventLoop::exec (this=this@entry=0x7f135705fda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f137fc9a3d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f13824c2f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f137fc9f2be in QThreadPrivate::start (arg=0x17705a0) at thread/qthread_unix.cpp:337
#17 0x00007f137ed8e6aa in start_thread (arg=0x7f1357060700) at pthread_create.c:333
#18 0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f13557f6700 (LWP 3028)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f138484e114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f138484e159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f137ed8e6aa in start_thread (arg=0x7f13557f6700) at pthread_create.c:333
#4  0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f134f4bb700 (LWP 3029)):
[KCrash Handler]
#6  __strstr_sse2_unaligned () at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
#7  0x00007f1382e8f80a in QSGRenderContext::initialize(QOpenGLContext*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f1382eb2619 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f137fc9f2be in QThreadPrivate::start (arg=0x1ab4f60) at thread/qthread_unix.cpp:337
#10 0x00007f137ed8e6aa in start_thread (arg=0x7f134f4bb700) at pthread_create.c:333
#11 0x00007f137f5b7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f1384e03800 (LWP 3015)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f137fca055b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1985f50) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ab4fa0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f1382eae83b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f1382eb132f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f1382eb193b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f13801a97c5 in QWindow::event (this=0x1964ae0, ev=<optimized out>) at kernel/qwindow.cpp:2058
#7  0x00007f1382ee1fd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x000000000043e906 in DesktopView::event (this=0x1964ae0, e=0x7ffe5b6642c0) at ../../shell/desktopview.cpp:206
#9  0x00007f138095cb8c in QApplicationPrivate::notify_helper (this=this@entry=0x10d7c60, receiver=receiver@entry=0x1964ae0, e=e@entry=0x7ffe5b6642c0) at kernel/qapplication.cpp:3720
#10 0x00007f1380962230 in QApplication::notify (this=0x7ffe5b664700, receiver=0x1964ae0, e=0x7ffe5b6642c0) at kernel/qapplication.cpp:3503
#11 0x00007f137fe7ef1b in QCoreApplication::notifyInternal (this=0x7ffe5b664700, receiver=receiver@entry=0x1964ae0, event=event@entry=0x7ffe5b6642c0) at kernel/qcoreapplication.cpp:935
#12 0x00007f13801a2336 in QCoreApplication::sendSpontaneousEvent (event=0x7ffe5b6642c0, receiver=0x1964ae0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#13 QGuiApplicationPrivate::processExposeEvent (e=0x19731b0) at kernel/qguiapplication.cpp:2616
#14 0x00007f13801a307d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x19731b0) at kernel/qguiapplication.cpp:1638
#15 0x00007f13801885b8 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#16 0x00007f137154a250 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#17 0x00007f137c358ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f137c359250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f137c3592fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f137fed627f in QEventDispatcherGlib::processEvents (this=0x112e020, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#21 0x00007f137fe7c75a in QEventLoop::exec (this=this@entry=0x7ffe5b664580, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#22 0x00007f137fe842cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#23 0x00007f138019900c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#24 0x00007f1380959025 in QApplication::exec () at kernel/qapplication.cpp:2956
#25 0x00000000004322c3 in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 354154, bug 353486, bug 352474, bug 352107, bug 351265.

Reported using DrKonqi