Bug 375411

Application: plasmashell (5.9.90)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-rc4-git-4c9eff7af69c+ x86_64
Distribution: Ubuntu Zesty Zapus (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
right-click on plasma panel --> select "Icons-only Task Manager Settings..." --> click "Cancel" --> plasmashell (wayland session) kcrash

- Custom settings of the application:

only happens in wayland session

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".
[Current thread is 1 (Thread 0x7f069c1f8440 (LWP 20382))]

Thread 8 (Thread 0x7f05d4479700 (LWP 20430)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f06964b3b4b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x5587a867a0b0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=this@entry=0x5587a8679fd8, mutex=mutex@entry=0x5587a8679fd0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f0699f6d495 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x5587a8679fc8) at scenegraph/qsgthreadedrenderloop.cpp:242
#4  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x5587a8679f50) at scenegraph/qsgthreadedrenderloop.cpp:690
#5  0x00007f0699f6dd8a in QSGRenderThread::run (this=0x5587a8679f50) at scenegraph/qsgthreadedrenderloop.cpp:719
#6  0x00007f06964b2c98 in QThreadPrivate::start (arg=0x5587a8679f50) at thread/qthread_unix.cpp:368
#7  0x00007f06953546ca in start_thread (arg=0x7f05d4479700) at pthread_create.c:333
#8  0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f05e7fff700 (LWP 20426)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f06964b3b4b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x5587a775f9e0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=this@entry=0x5587a7ae9c18, mutex=mutex@entry=0x5587a7ae9c10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f0699f6d495 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x5587a7ae9c08) at scenegraph/qsgthreadedrenderloop.cpp:242
#4  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x5587a7ae9b90) at scenegraph/qsgthreadedrenderloop.cpp:690
#5  0x00007f0699f6dd8a in QSGRenderThread::run (this=0x5587a7ae9b90) at scenegraph/qsgthreadedrenderloop.cpp:719
#6  0x00007f06964b2c98 in QThreadPrivate::start (arg=0x5587a7ae9b90) at thread/qthread_unix.cpp:368
#7  0x00007f06953546ca in start_thread (arg=0x7f05e7fff700) at pthread_create.c:333
#8  0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f05ee6bf700 (LWP 20424)):
#0  0x00007f0695db210d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0690a1ca36 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0690a1cb4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f06966d6eeb in QEventDispatcherGlib::processEvents (this=0x7f05e80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f069668084a in QEventLoop::exec (this=this@entry=0x7f05ee6bec50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f06964adfe3 in QThread::exec (this=this@entry=0x5587a7a9e900) at thread/qthread.cpp:507
#6  0x00007f0699efe4c6 in QQuickPixmapReader::run (this=0x5587a7a9e900) at util/qquickpixmapcache.cpp:822
#7  0x00007f06964b2c98 in QThreadPrivate::start (arg=0x5587a7a9e900) at thread/qthread_unix.cpp:368
#8  0x00007f06953546ca in start_thread (arg=0x7f05ee6bf700) at pthread_create.c:333
#9  0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f067d1c1700 (LWP 20412)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f069bb692c4 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f069bc52f20 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f069bb69309 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f06953546ca in start_thread (arg=0x7f067d1c1700) at pthread_create.c:333
#4  0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f067f1b8700 (LWP 20403)):
#0  0x00007ffc1e72ea6c in clock_gettime ()
#1  0x00007f0695dcc886 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f067f1b7a00) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f0696557f41 in qt_clock_gettime (ts=0x7f067f1b7a00, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:109
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:164
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:173
#5  0x00007f06966d4b69 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f0674002cd0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f06966d5115 in QTimerInfoList::timerWait (this=0x7f0674002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f06966d64be in timerSourcePrepareHelper (timeout=0x7f067f1b7ad4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f067f1b7ad4) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f0690a1bf1d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f0690a1c95b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f0690a1cb4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f06966d6eeb in QEventDispatcherGlib::processEvents (this=0x7f06740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f069668084a in QEventLoop::exec (this=this@entry=0x7f067f1b7ca0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#14 0x00007f06964adfe3 in QThread::exec (this=this@entry=0x5587a77ff530) at thread/qthread.cpp:507
#15 0x00007f0699377df5 in QQmlThreadPrivate::run (this=0x5587a77ff530) at qml/ftw/qqmlthread.cpp:147
#16 0x00007f06964b2c98 in QThreadPrivate::start (arg=0x5587a77ff530) at thread/qthread_unix.cpp:368
#17 0x00007f06953546ca in start_thread (arg=0x7f067f1b8700) at pthread_create.c:333
#18 0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f0684a2c700 (LWP 20402)):
#0  0x00007f0690a62044 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0690a1c9ea in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0690a1cb4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f06966d6eeb in QEventDispatcherGlib::processEvents (this=0x7f06780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f069668084a in QEventLoop::exec (this=this@entry=0x7f0684a2bca0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f06964adfe3 in QThread::exec (this=this@entry=0x5587a77a4f20) at thread/qthread.cpp:507
#6  0x00007f0699377df5 in QQmlThreadPrivate::run (this=0x5587a77a4f20) at qml/ftw/qqmlthread.cpp:147
#7  0x00007f06964b2c98 in QThreadPrivate::start (arg=0x5587a77a4f20) at thread/qthread_unix.cpp:368
#8  0x00007f06953546ca in start_thread (arg=0x7f0684a2c700) at pthread_create.c:333
#9  0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f068835c700 (LWP 20387)):
#0  0x00007f0695dadcdd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0690a60c80 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0690a1c4fe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0690a1c9d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0690a1cb4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f06966d6eeb in QEventDispatcherGlib::processEvents (this=0x7f06800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f069668084a in QEventLoop::exec (this=this@entry=0x7f068835bc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f06964adfe3 in QThread::exec (this=this@entry=0x7f0696d5bd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#8  0x00007f0696aea5c5 in QDBusConnectionManager::run (this=0x7f0696d5bd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007f06964b2c98 in QThreadPrivate::start (arg=0x7f0696d5bd20 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#10 0x00007f06953546ca in start_thread (arg=0x7f068835c700) at pthread_create.c:333
#11 0x00007f0695dbe0ff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f069c1f8440 (LWP 20382)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f06879a6cbd in QtWaylandClient::QWaylandDisplay::handleKeyboardFocusChanged (this=0x5587a76cb590, inputDevice=<optimized out>) at qwaylanddisplay.cpp:418
#8  0x00007f068799de1e in QtWaylandClient::QWaylandInputDevice::Keyboard::keyboard_leave (this=0x5587a76d0eb0, time=<optimized out>, surface=<optimized out>) at qwaylandinputdevice.cpp:629
#9  0x00007f06905c7e18 in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
#10 0x00007f06905c787a in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
#11 0x00007f0694f0ba9e in wl_closure_invoke (closure=<optimized out>, flags=<optimized out>, target=<optimized out>, opcode=2, data=<optimized out>) at ../src/connection.c:935
#12 0x00007f0694f08730 in dispatch_event (display=display@entry=0x5587a76cb710, queue=<optimized out>) at ../src/wayland-client.c:1310
#13 0x00007f0694f09984 in dispatch_queue (queue=0x5587a76cb7d8, display=0x5587a76cb710) at ../src/wayland-client.c:1456
#14 wl_display_dispatch_queue_pending (display=0x5587a76cb710, queue=0x5587a76cb7d8) at ../src/wayland-client.c:1698
#15 0x00007f0694f099dc in wl_display_dispatch_pending (display=<optimized out>) at ../src/wayland-client.c:1761
#16 0x00007f06879a5822 in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x5587a76cb590) at qwaylanddisplay.cpp:181
#17 0x00007f06966ae469 in QMetaObject::activate (sender=sender@entry=0x5587a773a560, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3740
#18 0x00007f06966aed87 in QMetaObject::activate (sender=sender@entry=0x5587a773a560, m=m@entry=0x7f0696acb380 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#19 0x00007f0696727bb3 in QAbstractEventDispatcher::awake (this=this@entry=0x5587a773a560) at .moc/moc_qabstracteventdispatcher.cpp:143
#20 0x00007f06966d6f0e in QEventDispatcherGlib::processEvents (this=0x5587a773a560, flags=...) at kernel/qeventdispatcher_glib.cpp:430
#21 0x00007f069668084a in QEventLoop::exec (this=this@entry=0x7ffc1e674ae0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#22 0x00007f0696688fbc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#23 0x00005587a6fd2052 in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:166

Reported using DrKonqi