Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-83-generic x86_64
Distribution: Ubuntu 16.04.2 LTS

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

Clicking/focussing on an already open application. This happens mostly at the beginning of a session, happens also infrequently / frequently during a session.

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".
[Current thread is 1 (Thread 0x7fefe29228c0 (LWP 16104))]

Thread 16 (Thread 0x7fef165f7700 (LWP 16139)):
#0  0x00007fefdd02c24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fefd9e086f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fefd9dc4e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fefd9dc5330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fefdd95d7eb in QEventDispatcherGlib::processEvents (this=0x7fef100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7fef165f6cc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fefdd721834 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fef18ad57d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007fefdd7267be in QThreadPrivate::start (arg=0x373dbc0) at thread/qthread_unix.cpp:331
#10 0x00007fefdc8126ba in start_thread (arg=0x7fef165f7700) at pthread_create.c:333
#11 0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fefa9abb700 (LWP 16129)):
#0  0x00007fefd9e09a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fefd9dc4dcc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fefd9dc5330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fefdd95d7eb in QEventDispatcherGlib::processEvents (this=0x7fef200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7fefa9abac90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fefdd721834 in QThread::exec (this=this@entry=0x29184b0) at thread/qthread.cpp:503
#7  0x00007fefe094fed6 in QQuickPixmapReader::run (this=0x29184b0) at util/qquickpixmapcache.cpp:817
#8  0x00007fefdd7267be in QThreadPrivate::start (arg=0x29184b0) at thread/qthread_unix.cpp:331
#9  0x00007fefdc8126ba in start_thread (arg=0x7fefa9abb700) at pthread_create.c:333
#10 0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fefb0f61700 (LWP 16128)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefe236ebd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fefe236ec19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefb0f61700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fefb28cd700 (LWP 16127)):
#0  0x00007fefd9dc5214 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fefdd95d7eb in QEventDispatcherGlib::processEvents (this=0x7fefa40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#3  0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7fefb28ccce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fefdd721834 in QThread::exec (this=this@entry=0x2605040) at thread/qthread.cpp:503
#5  0x00007fefdffc93c5 in QQmlThreadPrivate::run (this=0x2605040) at qml/ftw/qqmlthread.cpp:141
#6  0x00007fefdd7267be in QThreadPrivate::start (arg=0x2605040) at thread/qthread_unix.cpp:331
#7  0x00007fefdc8126ba in start_thread (arg=0x7fefb28cd700) at pthread_create.c:333
#8  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fefb4749700 (LWP 16126)):
#0  0x00007fefd9dc23b0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fefd9dc48bb in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fefd9dc52bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fefdd95d7eb in QEventDispatcherGlib::processEvents (this=0x7fefac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7fefb4748ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fefdd721834 in QThread::exec (this=this@entry=0x24e4a30) at thread/qthread.cpp:503
#7  0x00007fefdffc93c5 in QQmlThreadPrivate::run (this=0x24e4a30) at qml/ftw/qqmlthread.cpp:141
#8  0x00007fefdd7267be in QThreadPrivate::start (arg=0x24e4a30) at thread/qthread_unix.cpp:331
#9  0x00007fefdc8126ba in start_thread (arg=0x7fefb4749700) at pthread_create.c:333
#10 0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fefb8f7b700 (LWP 16125)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefb8f7b700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fefb977c700 (LWP 16124)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefb977c700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fefb9f7d700 (LWP 16123)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefb9f7d700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fefba77e700 (LWP 16122)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefba77e700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fefbaf7f700 (LWP 16121)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefbaf7f700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fefbb780700 (LWP 16120)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefbb780700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fefbbf81700 (LWP 16119)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefbbf81700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fefbc782700 (LWP 16118)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fefc47c43d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fefc47c4237 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fefdc8126ba in start_thread (arg=0x7fefbc782700) at pthread_create.c:333
#4  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fefc71d2700 (LWP 16109)):
#0  0x00007fefd9e09a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fefd9dc4320 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fefd9dc5245 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fefdd95d7eb in QEventDispatcherGlib::processEvents (this=0x7fefc00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7fefc71d1ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fefdd721834 in QThread::exec (this=this@entry=0x224fd90) at thread/qthread.cpp:503
#7  0x00007fefdffc93c5 in QQmlThreadPrivate::run (this=0x224fd90) at qml/ftw/qqmlthread.cpp:141
#8  0x00007fefdd7267be in QThreadPrivate::start (arg=0x224fd90) at thread/qthread_unix.cpp:331
#9  0x00007fefdc8126ba in start_thread (arg=0x7fefc71d2700) at pthread_create.c:333
#10 0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fefcdab9700 (LWP 16107)):
#0  0x00007fefdd03070d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fefe10f5c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fefe10f78d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fefcfc07889 in QXcbEventReader::run (this=0x21786e0) at qxcbconnection.cpp:1271
#4  0x00007fefdd7267be in QThreadPrivate::start (arg=0x21786e0) at thread/qthread_unix.cpp:331
#5  0x00007fefdc8126ba in start_thread (arg=0x7fefcdab9700) at pthread_create.c:333
#6  0x00007fefdd03c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fefe29228c0 (LWP 16104)):
[KCrash Handler]
#6  __memmove_avx_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S:245
#7  0x00007fefc444105d in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#8  0x00007fefc443f925 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#9  0x00007fefc5f56c1f in Plasma::WindowThumbnail::bindGLXTexture (this=this@entry=0x387e020) at /build/plasma-framework-ZIMEEb/plasma-framework-5.18.0/src/declarativeimports/core/windowthumbnail.cpp:447
#10 0x00007fefc5f57e44 in Plasma::WindowThumbnail::windowToTextureGLX (this=this@entry=0x387e020, textureNode=textureNode@entry=0x4873f40) at /build/plasma-framework-ZIMEEb/plasma-framework-5.18.0/src/declarativeimports/core/windowthumbnail.cpp:282
#11 0x00007fefc5f58803 in Plasma::WindowThumbnail::windowToTexture (this=0x387e020, textureNode=0x4873f40) at /build/plasma-framework-ZIMEEb/plasma-framework-5.18.0/src/declarativeimports/core/windowthumbnail.cpp:394
#12 0x00007fefc5f58d24 in Plasma::WindowThumbnail::updatePaintNode (this=0x387e020, oldNode=<optimized out>, updatePaintNodeData=<optimized out>) at /build/plasma-framework-ZIMEEb/plasma-framework-5.18.0/src/declarativeimports/core/windowthumbnail.cpp:199
#13 0x00007fefe09ee2d8 in QQuickWindowPrivate::updateDirtyNode (this=this@entry=0x3a56930, item=item@entry=0x387e020) at items/qquickwindow.cpp:2984
#14 0x00007fefe09eeb4b in QQuickWindowPrivate::updateDirtyNodes (this=this@entry=0x3a56930) at items/qquickwindow.cpp:2722
#15 0x00007fefe09eecc0 in QQuickWindowPrivate::syncSceneGraph (this=this@entry=0x3a56930) at items/qquickwindow.cpp:341
#16 0x00007fefe09bd12c in QSGGuiThreadRenderLoop::renderWindow (this=this@entry=0x23d1ab0, window=0x3a69600) at scenegraph/qsgrenderloop.cpp:372
#17 0x00007fefe09be2a1 in QSGGuiThreadRenderLoop::event (this=0x23d1ab0, e=<optimized out>) at scenegraph/qsgrenderloop.cpp:474
#18 0x00007fefde40a05c in QApplicationPrivate::notify_helper (this=this@entry=0x215d870, receiver=receiver@entry=0x23d1ab0, e=e@entry=0x7ffd82257d90) at kernel/qapplication.cpp:3716
#19 0x00007fefde40f516 in QApplication::notify (this=0x7ffd82258130, receiver=0x23d1ab0, e=0x7ffd82257d90) at kernel/qapplication.cpp:3499
#20 0x00007fefdd90738b in QCoreApplication::notifyInternal (this=0x7ffd82258130, receiver=0x23d1ab0, event=event@entry=0x7ffd82257d90) at kernel/qcoreapplication.cpp:965
#21 0x00007fefdd95c5ed in QCoreApplication::sendEvent (event=0x7ffd82257d90, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#22 QTimerInfoList::activateTimers (this=0x21a0ea0) at kernel/qtimerinfo_unix.cpp:637
#23 0x00007fefdd95caf1 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#24 0x00007fefd9dc5197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fefd9dc53f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fefd9dc549c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fefdd95d7cf in QEventDispatcherGlib::processEvents (this=0x21ab2f0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#28 0x00007fefdd904b4a in QEventLoop::exec (this=this@entry=0x7ffd82257fd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#29 0x00007fefdd90cbec in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#30 0x00007fefddc40bfc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#31 0x00007fefde406495 in QApplication::exec () at kernel/qapplication.cpp:2976
#32 0x0000000000432d4a in main (argc=4, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Possible duplicates by query: bug 381948, bug 372526, bug 372512.

Reported using DrKonqi