Application: plasmashell (5.5.3)

Qt Version: 5.5.1
Operating System: Linux 4.2.0-25-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
Plasma crashing incessantly on almost any action.  Clicking on taskbar item, clicking menu, opening an app, receiving a message, etc, etc

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".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7fbd64eea7c0 (LWP 20681))]

Thread 13 (Thread 0x7fbd51329700 (LWP 20684)):
#0  0x00007fbd5f5fa8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fbd636c8bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fbd636ca74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fbd53aa47e9 in QXcbEventReader::run (this=0x2407760) at qxcbconnection.cpp:1229
#4  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2407760) at thread/qthread_unix.cpp:331
#5  0x00007fbd5eddc6aa in start_thread (arg=0x7fbd51329700) at pthread_create.c:333
#6  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fbd4a634700 (LWP 20686)):
#0  0x00007fbd5c3900e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbd5c3902fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbd5ff2850b in QEventDispatcherGlib::processEvents (this=0x7fbd440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#3  0x00007fbd5fecf50a in QEventLoop::exec (this=this@entry=0x7fbd4a633de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fbd5fcebac4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#5  0x00007fbd62599c35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x24e1e00) at thread/qthread_unix.cpp:331
#7  0x00007fbd5eddc6aa in start_thread (arg=0x7fbd4a634700) at pthread_create.c:333
#8  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fbd3dca2700 (LWP 20687)):
#0  0x00007fbd5c3d4869 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbd5c38f789 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbd5c39011b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbd5c3902fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbd5ff2850b in QEventDispatcherGlib::processEvents (this=0x7fbd380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fbd5fecf50a in QEventLoop::exec (this=this@entry=0x7fbd3dca1de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fbd5fcebac4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fbd62599c35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2825480) at thread/qthread_unix.cpp:331
#9  0x00007fbd5eddc6aa in start_thread (arg=0x7fbd3dca2700) at pthread_create.c:333
#10 0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fbd37fff700 (LWP 20688)):
#0  0x00007fbd5f5f649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fbd5c3d34e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbd5c38fcd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbd5c390190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbd5c3902fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbd5ff2850b in QEventDispatcherGlib::processEvents (this=0x7fbd300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007fbd5fecf50a in QEventLoop::exec (this=this@entry=0x7fbd37ffede0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007fbd5fcebac4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007fbd62599c35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2a29f90) at thread/qthread_unix.cpp:331
#10 0x00007fbd5eddc6aa in start_thread (arg=0x7fbd37fff700) at pthread_create.c:333
#11 0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fbd369c3700 (LWP 20689)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd64942194 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fbd649421d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fbd5eddc6aa in start_thread (arg=0x7fbd369c3700) at pthread_create.c:333
#4  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fbcaffff700 (LWP 20690)):
#0  0x00007fbd5f5fa8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fbd5c3901ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbd5c3902fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbd5ff2850b in QEventDispatcherGlib::processEvents (this=0x7fbca80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fbd5fecf50a in QEventLoop::exec (this=this@entry=0x7fbcafffed90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fbd5fcebac4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fbd62f222a6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2c0ccc0) at thread/qthread_unix.cpp:331
#8  0x00007fbd5eddc6aa in start_thread (arg=0x7fbcaffff700) at pthread_create.c:333
#9  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fbcaea80700 (LWP 20691)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2c64580) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2b3d1e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f97d6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f985f3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2b3d160) at thread/qthread_unix.cpp:331
#6  0x00007fbd5eddc6aa in start_thread (arg=0x7fbcaea80700) at pthread_create.c:333
#7  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fbca7fff700 (LWP 20692)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2b24a00) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2b91410, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f97d6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f985f3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2b91390) at thread/qthread_unix.cpp:331
#6  0x00007fbd5eddc6aa in start_thread (arg=0x7fbca7fff700) at pthread_create.c:333
#7  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fbc9412c700 (LWP 20704)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x36cfe90) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x36976e0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f97d6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f985f3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x3697660) at thread/qthread_unix.cpp:331
#6  0x00007fbd5eddc6aa in start_thread (arg=0x7fbc9412c700) at pthread_create.c:333
#7  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fbc935b8700 (LWP 20705)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x3b44100) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x3b43f20, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f97d6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f985f3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x3b43ea0) at thread/qthread_unix.cpp:331
#6  0x00007fbd5eddc6aa in start_thread (arg=0x7fbc935b8700) at pthread_create.c:333
#7  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fbc823de700 (LWP 20735)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x3724650) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x3edfad0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f97d6e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f985f3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x3edfa50) at thread/qthread_unix.cpp:331
#6  0x00007fbd5eddc6aa in start_thread (arg=0x7fbc823de700) at pthread_create.c:333
#7  0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fbc82bdf700 (LWP 21740)):
[KCrash Handler]
#6  __strstr_sse2_unaligned () at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
#7  0x00007fbd62f74e5a in QSGRenderContext::initialize(QOpenGLContext*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fbd62f98849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fbd5fcf0a6e in QThreadPrivate::start (arg=0x2becc40) at thread/qthread_unix.cpp:331
#10 0x00007fbd5eddc6aa in start_thread (arg=0x7fbc82bdf700) at pthread_create.c:333
#11 0x00007fbd5f605eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fbd64eea7c0 (LWP 20681)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbd5fcf1d0b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x40ddb10) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2becc80, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fbd62f95006 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fbd62f974dc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fbd62f97b73 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fbd6021d3a5 in QWindow::event (this=0x377e610, ev=<optimized out>) at kernel/qwindow.cpp:2054
#7  0x00007fbd62fca441 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fbd64a7331b in PlasmaQuick::Dialog::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#9  0x00007fbd609d69dc in QApplicationPrivate::notify_helper (this=this@entry=0x23ebc90, receiver=receiver@entry=0x377e610, e=e@entry=0x7ffc07397350) at kernel/qapplication.cpp:3716
#10 0x00007fbd609dbea6 in QApplication::notify (this=0x7ffc07397770, receiver=0x377e610, e=0x7ffc07397350) at kernel/qapplication.cpp:3499
#11 0x00007fbd5fed1d7b in QCoreApplication::notifyInternal (this=0x7ffc07397770, receiver=receiver@entry=0x377e610, event=event@entry=0x7ffc07397350) at kernel/qcoreapplication.cpp:965
#12 0x00007fbd602155bc in QCoreApplication::sendSpontaneousEvent (event=0x7ffc07397350, receiver=0x377e610) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#13 QGuiApplicationPrivate::processExposeEvent (e=0x30dea50) at kernel/qguiapplication.cpp:2651
#14 0x00007fbd6021632d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x30dea50) at kernel/qguiapplication.cpp:1646
#15 0x00007fbd601fa228 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#16 0x00007fbd53ad60b0 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#17 0x00007fbd5c38fff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fbd5c390250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fbd5c3902fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fbd5ff284ef in QEventDispatcherGlib::processEvents (this=0x2431730, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#21 0x00007fbd5fecf50a in QEventLoop::exec (this=this@entry=0x7ffc07397610, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#22 0x00007fbd5fed75ec in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#23 0x00007fbd6020bd1c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1530
#24 0x00007fbd609d2e15 in QApplication::exec () at kernel/qapplication.cpp:2976
#25 0x000000000043258a in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:179

Possible duplicates by query: bug 356907, bug 354305, bug 354154, bug 353486, bug 352474.

Reported using DrKonqi