https://bugs.kde.org/show_bug.cgi?id=362669

Sebastian Stein <seb....@hpfsc.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |seb....@hpfsc.de

--- Comment #2 from Sebastian Stein <seb....@hpfsc.de> ---
Since upgrading to Kubuntu 16.04, my plasmashell also crashes. The window bar
disappears for a few seconds and restarts.

To me, it looks like this happens when I try to select another window by mouse
click and the preview of the window gets shown. I can reproduce the bug by just
hovering with the mouse over an entry in the window bar.


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 0x7f999fd7d8c0 (LWP 6141))]

Thread 12 (Thread 0x7f998af1b700 (LWP 6143)):
#0  0x00007f999a490e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f999e555c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f999e5578d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f998d069629 in QXcbEventReader::run (this=0x254f660) at
qxcbconnection.cpp:1253
#4  0x00007f999ab8684e in QThreadPrivate::start (arg=0x254f660) at
thread/qthread_unix.cpp:331
#5  0x00007f9999c736fa in start_thread (arg=0x7f998af1b700) at
pthread_create.c:333
#6  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f9983fff700 (LWP 6146)):
#0  0x00007f999a490e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f999722631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f999adbda9b in QEventDispatcherGlib::processEvents
(this=0x7f997c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7f9983ffece0,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f999ab818a4 in QThread::exec (this=this@entry=0x263d450) at
thread/qthread.cpp:503
#6  0x00007f999d4293c5 in QQmlThreadPrivate::run (this=0x263d450) at
qml/ftw/qqmlthread.cpp:141
#7  0x00007f999ab8684e in QThreadPrivate::start (arg=0x263d450) at
thread/qthread_unix.cpp:331
#8  0x00007f9999c736fa in start_thread (arg=0x7f9983fff700) at
pthread_create.c:333
#9  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f997962c700 (LWP 6151)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f99819c3aa3 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f99819c3907 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f9999c736fa in start_thread (arg=0x7f997962c700) at
pthread_create.c:333
#4  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f9978e2b700 (LWP 6152)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f99819c3aa3 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f99819c3907 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f9999c736fa in start_thread (arg=0x7f9978e2b700) at
pthread_create.c:333
#4  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f997862a700 (LWP 6153)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f99819c3aa3 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f99819c3907 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f9999c736fa in start_thread (arg=0x7f997862a700) at
pthread_create.c:333
#4  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f9977e29700 (LWP 6154)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f99819c3aa3 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007f99819c3907 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007f9999c736fa in start_thread (arg=0x7f9977e29700) at
pthread_create.c:333
#4  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f997382e700 (LWP 6155)):
#0  0x00007f999a490e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f999722631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f999adbda9b in QEventDispatcherGlib::processEvents
(this=0x7f996c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7f997382dce0,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f999ab818a4 in QThread::exec (this=this@entry=0x287f480) at
thread/qthread.cpp:503
#6  0x00007f999d4293c5 in QQmlThreadPrivate::run (this=0x287f480) at
qml/ftw/qqmlthread.cpp:141
#7  0x00007f999ab8684e in QThreadPrivate::start (arg=0x287f480) at
thread/qthread_unix.cpp:331
#8  0x00007f9999c736fa in start_thread (arg=0x7f997382e700) at
pthread_create.c:333
#9  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f9971a70700 (LWP 6156)):
#0  0x00007f9997223420 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9997225928 in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f999722624b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f999adbda9b in QEventDispatcherGlib::processEvents
(this=0x7f99640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7f9971a6fce0,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f999ab818a4 in QThread::exec (this=this@entry=0x29564b0) at
thread/qthread.cpp:503
#7  0x00007f999d4293c5 in QQmlThreadPrivate::run (this=0x29564b0) at
qml/ftw/qqmlthread.cpp:141
#8  0x00007f999ab8684e in QThreadPrivate::start (arg=0x29564b0) at
thread/qthread_unix.cpp:331
#9  0x00007f9999c736fa in start_thread (arg=0x7f9971a70700) at
pthread_create.c:333
#10 0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f996bfff700 (LWP 6157)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f999f7cebd4 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f999f7cec19 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f9999c736fa in start_thread (arg=0x7f996bfff700) at
pthread_create.c:333
#4  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f9969776700 (LWP 6159)):
#0  _dl_update_slotinfo (req_modid=<optimized out>) at dl-tls.c:735
#1  0x00007f999fd47aac in update_get_addr (ti=0x7f999afb1788) at dl-tls.c:802
#2  0x00007f999ab85792 in get_thread_data () at thread/qthread_unix.cpp:181
#3  QThreadData::current (createIfNecessary=createIfNecessary@entry=true) at
thread/qthread_unix.cpp:212
#4  0x00007f999adbcffa in postEventSourcePrepare (s=0x7f98e00012d0,
timeout=0x7f9969775ad4) at kernel/qeventdispatcher_glib.cpp:247
#5  0x00007f99972258ad in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f999722624b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f999adbda9b in QEventDispatcherGlib::processEvents
(this=0x7f98e00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#9  0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7f9969775c90,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007f999ab818a4 in QThread::exec (this=this@entry=0x2b5cdf0) at
thread/qthread.cpp:503
#11 0x00007f999ddafed6 in QQuickPixmapReader::run (this=0x2b5cdf0) at
util/qquickpixmapcache.cpp:817
#12 0x00007f999ab8684e in QThreadPrivate::start (arg=0x2b5cdf0) at
thread/qthread_unix.cpp:331
#13 0x00007f9999c736fa in start_thread (arg=0x7f9969776700) at
pthread_create.c:333
#14 0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f98d5d9d700 (LWP 6169)):
#0  0x00007f999a490e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f999722631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f999adbda9b in QEventDispatcherGlib::processEvents
(this=0x7f98d00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7f98d5d9ccc0,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f999ab818a4 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:503
#6  0x00007f98d827d7d7 in KCupsConnection::run() () from
/usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f999ab8684e in QThreadPrivate::start (arg=0x3926ff0) at
thread/qthread_unix.cpp:331
#8  0x00007f9999c736fa in start_thread (arg=0x7f98d5d9d700) at
pthread_create.c:333
#9  0x00007f999a49cb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f999fd7d8c0 (LWP 6141)):
[KCrash Handler]
#6  __memmove_ssse3_back () at
../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:1574
#7  0x00007f99816534ad in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#8  0x00007f9981651d95 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#9  0x00007f9988135c1f in Plasma::WindowThumbnail::bindGLXTexture
(this=this@entry=0x3bff5d0) at
../../../../src/declarativeimports/core/windowthumbnail.cpp:447
#10 0x00007f9988136e44 in Plasma::WindowThumbnail::windowToTextureGLX
(this=this@entry=0x3bff5d0, textureNode=textureNode@entry=0x5d3eb90) at
../../../../src/declarativeimports/core/windowthumbnail.cpp:282
#11 0x00007f9988137803 in Plasma::WindowThumbnail::windowToTexture
(this=0x3bff5d0, textureNode=0x5d3eb90) at
../../../../src/declarativeimports/core/windowthumbnail.cpp:394
#12 0x00007f9988137d24 in Plasma::WindowThumbnail::updatePaintNode
(this=0x3bff5d0, oldNode=<optimized out>, updatePaintNodeData=<optimized out>)
at ../../../../src/declarativeimports/core/windowthumbnail.cpp:199
#13 0x00007f999de4e2d8 in QQuickWindowPrivate::updateDirtyNode
(this=this@entry=0x3d60e20, item=item@entry=0x3bff5d0) at
items/qquickwindow.cpp:2984
#14 0x00007f999de4eb4b in QQuickWindowPrivate::updateDirtyNodes
(this=this@entry=0x3d60e20) at items/qquickwindow.cpp:2722
#15 0x00007f999de4ecc0 in QQuickWindowPrivate::syncSceneGraph
(this=this@entry=0x3d60e20) at items/qquickwindow.cpp:341
#16 0x00007f999de1d12c in QSGGuiThreadRenderLoop::renderWindow
(this=this@entry=0x27a8ea0, window=0x4014050) at
scenegraph/qsgrenderloop.cpp:372
#17 0x00007f999de1eaa6 in QSGGuiThreadRenderLoop::exposureChanged
(this=0x27a8ea0, window=0x4014050) at scenegraph/qsgrenderloop.cpp:422
#18 0x00007f999b0b22f5 in QWindow::event (this=this@entry=0x4014050,
ev=ev@entry=0x7ffc5f46cae0) at kernel/qwindow.cpp:2060
#19 0x00007f999de58871 in QQuickWindow::event (this=this@entry=0x4014050,
e=e@entry=0x7ffc5f46cae0) at items/qquickwindow.cpp:1413
#20 0x00007f999f8ff2eb in PlasmaQuick::Dialog::event
(this=this@entry=0x4014050, event=event@entry=0x7ffc5f46cae0) at
../../../src/plasmaquick/dialog.cpp:1168
#21 0x00007f998812fc45 in ToolTipDialog::event (this=0x4014050,
e=0x7ffc5f46cae0) at
../../../../src/declarativeimports/core/tooltipdialog.cpp:120
#22 0x00007f999b86a05c in QApplicationPrivate::notify_helper
(this=this@entry=0x25346a0, receiver=receiver@entry=0x4014050,
e=e@entry=0x7ffc5f46cae0) at kernel/qapplication.cpp:3716
#23 0x00007f999b86f516 in QApplication::notify (this=0x7ffc5f46cf00,
receiver=0x4014050, e=0x7ffc5f46cae0) at kernel/qapplication.cpp:3499
#24 0x00007f999ad6762b in QCoreApplication::notifyInternal
(this=0x7ffc5f46cf00, receiver=receiver@entry=0x4014050,
event=event@entry=0x7ffc5f46cae0) at kernel/qcoreapplication.cpp:965
#25 0x00007f999b0aa4ec in QCoreApplication::sendSpontaneousEvent
(event=0x7ffc5f46cae0, receiver=0x4014050) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#26 QGuiApplicationPrivate::processExposeEvent (e=0x3aa6e70) at
kernel/qguiapplication.cpp:2663
#27 0x00007f999b0ab25d in QGuiApplicationPrivate::processWindowSystemEvent
(e=e@entry=0x3aa6e70) at kernel/qguiapplication.cpp:1658
#28 0x00007f999b08ef38 in QWindowSystemInterface::sendWindowSystemEvents
(flags=...) at kernel/qwindowsysteminterface.cpp:625
#29 0x00007f998d09b070 in userEventSourceDispatch (source=<optimized out>) at
eventdispatchers/qeventdispatcher_glib.cpp:70
#30 0x00007f9997226127 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f9997226380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f999722642c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f999adbda7f in QEventDispatcherGlib::processEvents (this=0x25735e0,
flags=...) at kernel/qeventdispatcher_glib.cpp:418
#34 0x00007f999ad64dea in QEventLoop::exec (this=this@entry=0x7ffc5f46cda0,
flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#35 0x00007f999ad6ce8c in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1229
#36 0x00007f999b0a0c3c in QGuiApplication::exec () at
kernel/qguiapplication.cpp:1542
#37 0x00007f999b866495 in QApplication::exec () at kernel/qapplication.cpp:2976
#38 0x0000000000432d4a in main (argc=4, argv=<optimized out>) at
/build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

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