Bug 361844

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-18-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
plasmashell crashes randomly in my newly installed kubuntu 16.04 in KVM (using virt-manager)

The crash can be reproduced sometimes.

-- 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 0x7fe39cd078c0 (LWP 3428))]

Thread 10 (Thread 0x7fe387ed1700 (LWP 3432)):
#0  0x00007fe39740ce8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fe39b4d1c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe39b4d38d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe38a01f629 in QXcbEventReader::run (this=0xd6b6e0) at qxcbconnection.cpp:1253
#4  0x00007fe397b0284e in QThreadPrivate::start (arg=0xd6b6e0) at thread/qthread_unix.cpp:331
#5  0x00007fe396bef6fa in start_thread (arg=0x7fe387ed1700) at pthread_create.c:333
#6  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fe38566b700 (LWP 3441)):
#0  0x00007fe3941a12b0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe3941a21d5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe3941a242c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe397d39a9b in QEventDispatcherGlib::processEvents (this=0x7fe3780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7fe38566ace0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe397afd8a4 in QThread::exec (this=this@entry=0xe501a0) at thread/qthread.cpp:503
#6  0x00007fe39a3a53c5 in QQmlThreadPrivate::run (this=0xe501a0) at qml/ftw/qqmlthread.cpp:141
#7  0x00007fe397b0284e in QThreadPrivate::start (arg=0xe501a0) at thread/qthread_unix.cpp:331
#8  0x00007fe396bef6fa in start_thread (arg=0x7fe38566b700) at pthread_create.c:333
#9  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fe37d641700 (LWP 3458)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe37eba1aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fe37eba1907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fe396bef6fa in start_thread (arg=0x7fe37d641700) at pthread_create.c:333
#4  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fe37ce40700 (LWP 3459)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe37eba1aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fe37eba1907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fe396bef6fa in start_thread (arg=0x7fe37ce40700) at pthread_create.c:333
#4  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fe371a3b700 (LWP 3475)):
#0  QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:138
#1  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:132
#2  QThreadData::canWaitLocked (this=0x10a7c90) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#3  postEventSourcePrepare (s=0x7fe36c0012d0, timeout=0x7fe371a3ab24) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007fe3941a18ad in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe3941a224b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe3941a242c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fe397d39a9b in QEventDispatcherGlib::processEvents (this=0x7fe36c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#8  0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7fe371a3ace0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007fe397afd8a4 in QThread::exec (this=this@entry=0x10a6660) at thread/qthread.cpp:503
#10 0x00007fe39a3a53c5 in QQmlThreadPrivate::run (this=0x10a6660) at qml/ftw/qqmlthread.cpp:141
#11 0x00007fe397b0284e in QThreadPrivate::start (arg=0x10a6660) at thread/qthread_unix.cpp:331
#12 0x00007fe396bef6fa in start_thread (arg=0x7fe371a3b700) at pthread_create.c:333
#13 0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fe36bc98700 (LWP 3476)):
#0  __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:65
#1  0x00007fe3974089c2 in read () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007fe3941e56c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe3941a1e04 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe3941a22c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe3941a242c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe397d39a9b in QEventDispatcherGlib::processEvents (this=0x7fe3640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#7  0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7fe36bc97ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007fe397afd8a4 in QThread::exec (this=this@entry=0x114d960) at thread/qthread.cpp:503
#9  0x00007fe39a3a53c5 in QQmlThreadPrivate::run (this=0x114d960) at qml/ftw/qqmlthread.cpp:141
#10 0x00007fe397b0284e in QThreadPrivate::start (arg=0x114d960) at thread/qthread_unix.cpp:331
#11 0x00007fe396bef6fa in start_thread (arg=0x7fe36bc98700) at pthread_create.c:333
#12 0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fe36a365700 (LWP 3479)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe39c74abd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fe39c74ac19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fe396bef6fa in start_thread (arg=0x7fe36a365700) at pthread_create.c:333
#4  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fe2e3929700 (LWP 3487)):
#0  0x00007fe3941a2418 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe397d39a9b in QEventDispatcherGlib::processEvents (this=0x7fe2dc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#2  0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7fe2e3928c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#3  0x00007fe397afd8a4 in QThread::exec (this=this@entry=0x139a7d0) at thread/qthread.cpp:503
#4  0x00007fe39ad2bed6 in QQuickPixmapReader::run (this=0x139a7d0) at util/qquickpixmapcache.cpp:817
#5  0x00007fe397b0284e in QThreadPrivate::start (arg=0x139a7d0) at thread/qthread_unix.cpp:331
#6  0x00007fe396bef6fa in start_thread (arg=0x7fe2e3929700) at pthread_create.c:333
#7  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fe2d2184700 (LWP 3680)):
#0  0x00007fe39740ce8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fe3941a231c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe3941a242c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe397d39a9b in QEventDispatcherGlib::processEvents (this=0x7fe2cc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7fe2d2183cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe397afd8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fe2d46647d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fe397b0284e in QThreadPrivate::start (arg=0x1fad1f0) at thread/qthread_unix.cpp:331
#8  0x00007fe396bef6fa in start_thread (arg=0x7fe2d2184700) at pthread_create.c:333
#9  0x00007fe397418b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fe39cd078c0 (LWP 3428)):
[KCrash Handler]
#6  __memmove_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:114
#7  0x00007fe37e8314ad in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#8  0x00007fe37e82fd95 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#9  0x00007fe38434fc1f in Plasma::WindowThumbnail::bindGLXTexture (this=this@entry=0x2933fc0) at ../../../../src/declarativeimports/core/windowthumbnail.cpp:447
#10 0x00007fe384350e44 in Plasma::WindowThumbnail::windowToTextureGLX (this=this@entry=0x2933fc0, textureNode=textureNode@entry=0x30d7aa0) at ../../../../src/declarativeimports/core/windowthumbnail.cpp:282
#11 0x00007fe384351803 in Plasma::WindowThumbnail::windowToTexture (this=0x2933fc0, textureNode=0x30d7aa0) at ../../../../src/declarativeimports/core/windowthumbnail.cpp:394
#12 0x00007fe384351d24 in Plasma::WindowThumbnail::updatePaintNode (this=0x2933fc0, oldNode=<optimized out>, updatePaintNodeData=<optimized out>) at ../../../../src/declarativeimports/core/windowthumbnail.cpp:199
#13 0x00007fe39adca2d8 in QQuickWindowPrivate::updateDirtyNode (this=this@entry=0x265a140, item=item@entry=0x2933fc0) at items/qquickwindow.cpp:2984
#14 0x00007fe39adcab4b in QQuickWindowPrivate::updateDirtyNodes (this=this@entry=0x265a140) at items/qquickwindow.cpp:2722
#15 0x00007fe39adcacc0 in QQuickWindowPrivate::syncSceneGraph (this=this@entry=0x265a140) at items/qquickwindow.cpp:341
#16 0x00007fe39ad9912c in QSGGuiThreadRenderLoop::renderWindow (this=this@entry=0xf9e7e0, window=0x26705f0) at scenegraph/qsgrenderloop.cpp:372
#17 0x00007fe39ad9aaa6 in QSGGuiThreadRenderLoop::exposureChanged (this=0xf9e7e0, window=0x26705f0) at scenegraph/qsgrenderloop.cpp:422
#18 0x00007fe39802e2e5 in QWindow::event (this=this@entry=0x26705f0, ev=ev@entry=0x7ffd21961900) at kernel/qwindow.cpp:2060
#19 0x00007fe39add4871 in QQuickWindow::event (this=this@entry=0x26705f0, e=e@entry=0x7ffd21961900) at items/qquickwindow.cpp:1413
#20 0x00007fe39c87b2eb in PlasmaQuick::Dialog::event (this=this@entry=0x26705f0, event=event@entry=0x7ffd21961900) at ../../../src/plasmaquick/dialog.cpp:1168
#21 0x00007fe384349c45 in ToolTipDialog::event (this=0x26705f0, e=0x7ffd21961900) at ../../../../src/declarativeimports/core/tooltipdialog.cpp:120
#22 0x00007fe3987e605c in QApplicationPrivate::notify_helper (this=this@entry=0xd50690, receiver=receiver@entry=0x26705f0, e=e@entry=0x7ffd21961900) at kernel/qapplication.cpp:3716
#23 0x00007fe3987eb516 in QApplication::notify (this=0x7ffd21961d20, receiver=0x26705f0, e=0x7ffd21961900) at kernel/qapplication.cpp:3499
#24 0x00007fe397ce362b in QCoreApplication::notifyInternal (this=0x7ffd21961d20, receiver=receiver@entry=0x26705f0, event=event@entry=0x7ffd21961900) at kernel/qcoreapplication.cpp:965
#25 0x00007fe3980264ec in QCoreApplication::sendSpontaneousEvent (event=0x7ffd21961900, receiver=0x26705f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#26 QGuiApplicationPrivate::processExposeEvent (e=0x27a5d60) at kernel/qguiapplication.cpp:2663
#27 0x00007fe39802725d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x27a5d60) at kernel/qguiapplication.cpp:1658
#28 0x00007fe39800af38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#29 0x00007fe38a050f10 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#30 0x00007fe3941a2127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fe3941a2380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fe3941a242c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fe397d39a7f in QEventDispatcherGlib::processEvents (this=0xd98420, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#34 0x00007fe397ce0dea in QEventLoop::exec (this=this@entry=0x7ffd21961bc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x00007fe397ce8e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#36 0x00007fe39801cc3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#37 0x00007fe3987e2495 in QApplication::exec () at kernel/qapplication.cpp:2976
#38 0x0000000000432d4a in main (argc=2, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Possible duplicates by query: bug 361110, bug 359825, bug 358699, bug 357915.

Reported using DrKonqi