Bug 415795

Summary: Plasma crash when reenabling disabled monitors after existing Steam
Product: [Plasma] plasmashell Reporter: Tim Richardson <tim>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.17.4   
Target Milestone: 1.0   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Tim Richardson 2020-01-02 12:03:01 UTC 
Application: plasmashell (5.17.4)

Qt Version: 5.13.2
Frameworks Version: 5.65.0
Operating System: Linux 5.3.13-custom x86_64
Distribution: KDE neon User Edition 5.17

-- Information about the crash:
- What I was doing when the application crashed:
Steam disabled my laptop display and one of my external monitors. When  I tried to reenable them, this crash happned (although the monitors were successfully reenabled, the recovery from the crash was fine)

- Unusual behavior I noticed:

-- 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 0x7f4cb7506e40 (LWP 2378))]

Thread 14 (Thread 0x7f4c494dc700 (LWP 4155)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5557c73051b4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5557c7305160, cond=0x5557c7305188) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x5557c7305188, mutex=0x5557c7305160) at pthread_cond_wait.c:655
#3  0x00007f4cb134caeb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x5557c7305160) at thread/qwaitcondition_unix.cpp:146
#4  0x00007f4cb134caeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5557c8f7def0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f4cb134cdf9 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x5557c8f7def8, mutex=mutex@entry=0x5557c8f7def0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f4cb536dec8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x5557c8f7dee8) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  0x00007f4cb536dec8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x5557c8f7de70) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f4cb536e2fa in QSGRenderThread::run() (this=0x5557c8f7de70) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c8f7de70) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c494dc700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f4c4bae4700 (LWP 4154)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5557c73435a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5557c7343550, cond=0x5557c7343578) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x5557c7343578, mutex=0x5557c7343550) at pthread_cond_wait.c:655
#3  0x00007f4cb134caeb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x5557c7343550) at thread/qwaitcondition_unix.cpp:146
#4  0x00007f4cb134caeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5557c8f26310, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f4cb134cdf9 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x5557c8f26318, mutex=mutex@entry=0x5557c8f26310, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f4cb536dec8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x5557c8f26308) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  0x00007f4cb536dec8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x5557c8f26290) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f4cb536e2fa in QSGRenderThread::run() (this=0x5557c8f26290) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c8f26290) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c4bae4700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f4c4b2e3700 (LWP 3037)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5557c76617f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5557c76617a0, cond=0x5557c76617c8) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x5557c76617c8, mutex=0x5557c76617a0) at pthread_cond_wait.c:655
#3  0x00007f4cb134caeb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x5557c76617a0) at thread/qwaitcondition_unix.cpp:146
#4  0x00007f4cb134caeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5557c76a3b90, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f4cb134cdf9 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x5557c76a3b98, mutex=mutex@entry=0x5557c76a3b90, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f4cb536dec8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x5557c76a3b88) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  0x00007f4cb536dec8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x5557c76a3b10) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f4cb536e2fa in QSGRenderThread::run() (this=0x5557c76a3b10) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c76a3b10) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c4b2e3700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f4c513a5700 (LWP 2849)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5557c439e7d4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5557c439e780, cond=0x5557c439e7a8) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x5557c439e7a8, mutex=0x5557c439e780) at pthread_cond_wait.c:655
#3  0x00007f4cb134caeb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x5557c439e780) at thread/qwaitcondition_unix.cpp:146
#4  0x00007f4cb134caeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5557c4348a50, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f4cb134cdf9 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x5557c4348a58, mutex=mutex@entry=0x5557c4348a50, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f4cb536dec8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x5557c4348a48) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  0x00007f4cb536dec8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x5557c43489d0) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f4cb536e2fa in QSGRenderThread::run() (this=0x5557c43489d0) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c43489d0) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c513a5700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f4c53c03700 (LWP 2846)):
#0  0x00007f4cb0c35bf9 in __GI___poll (fds=0x7f4c4c0060d0, nfds=1, timeout=3335932) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4caadaf5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c4c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c53c02d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f4cb13443aa in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f4c56561407 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c41df820) at thread/qthread_unix.cpp:360
#8  0x00007f4cae2766db in start_thread (arg=0x7f4c53c03700) at pthread_create.c:463
#9  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f4c70898700 (LWP 2811)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4c9c005890) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4c9c005840, cond=0x7f4c9c005868) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x7f4c9c005868, mutex=0x7f4c9c005840) at pthread_cond_wait.c:655
#3  0x00007f4cb134caeb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x7f4c9c005840) at thread/qwaitcondition_unix.cpp:146
#4  0x00007f4cb134caeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5557c35e4db0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f4cb134cdf9 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x5557c35e4db8, mutex=mutex@entry=0x5557c35e4db0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f4cb536dec8 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x5557c35e4da8) at scenegraph/qsgthreadedrenderloop.cpp:245
#7  0x00007f4cb536dec8 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x5557c35e4d30) at scenegraph/qsgthreadedrenderloop.cpp:710
#8  0x00007f4cb536e2fa in QSGRenderThread::run() (this=0x5557c35e4d30) at scenegraph/qsgthreadedrenderloop.cpp:739
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c35e4d30) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c70898700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f4c73fff700 (LWP 2702)):
#0  0x00007f4cb0c35bf9 in __GI___poll (fds=0x7f4c6c0051f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4caadaf5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c6c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c73ffed30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f4cb13443aa in QThread::exec() (this=this@entry=0x5557c31cc6a0) at thread/qthread.cpp:531
#6  0x00007f4cb52e7ac6 in QQuickPixmapReader::run() (this=0x5557c31cc6a0) at util/qquickpixmapcache.cpp:962
#7  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c31cc6a0) at thread/qthread_unix.cpp:360
#8  0x00007f4cae2766db in start_thread (arg=0x7f4c73fff700) at pthread_create.c:463
#9  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f4c7bfff700 (LWP 2638)):
#0  0x00007f4cb0c35bf9 in __GI___poll (fds=0x7f4c74004e10, nfds=1, timeout=8932) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4caadaf5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c74000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c7bffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f4cb13443aa in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c2fd7a30) at thread/qthread_unix.cpp:360
#7  0x00007f4cae2766db in start_thread (arg=0x7f4c7bfff700) at pthread_create.c:463
#8  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f4c80890700 (LWP 2637)):
#0  0x00007f4cb0c516ff in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007f4cb0c35be6 in __GI___poll (fds=0x7f4c7c004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#2  0x00007f4caadaf5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c7c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c8088fd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f4cb13443aa in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f4c80e81825 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/XmlListModel/libqmlxmllistmodelplugin.so
#8  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c30062f0) at thread/qthread_unix.cpp:360
#9  0x00007f4cae2766db in start_thread (arg=0x7f4c80890700) at pthread_create.c:463
#10 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f4c90bfe700 (LWP 2616)):
#0  0x00007f4cae27c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5557c2ae5748) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f4cae27c9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5557c2ae56f8, cond=0x5557c2ae5720) at pthread_cond_wait.c:502
#2  0x00007f4cae27c9f3 in __pthread_cond_wait (cond=0x5557c2ae5720, mutex=0x5557c2ae56f8) at pthread_cond_wait.c:655
#3  0x00007f4c9215ac3b in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f4c9215a837 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f4cae2766db in start_thread (arg=0x7f4c90bfe700) at pthread_create.c:463
#6  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f4c99d6d700 (LWP 2572)):
#0  0x00007f4cb0c35bf9 in __GI___poll (fds=0x7f4c8c004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4caadaf5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c8c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c99d6cd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f4cb13443aa in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f4cb4e15815 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c2af09f0) at thread/qthread_unix.cpp:360
#8  0x00007f4cae2766db in start_thread (arg=0x7f4c99d6d700) at pthread_create.c:463
#9  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f4c9bfff700 (LWP 2404)):
#0  0x00007f4cb0c310b4 in __GI___libc_read (fd=15, buf=0x7f4c9bffeb60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f4caadf42d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4caadaf0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4caadaf570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4cb1588b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4c94000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c9bffed70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f4cb13443aa in QThread::exec() (this=this@entry=0x7f4cb28b4d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:531
#8  0x00007f4cb263d0e5 in QDBusConnectionManager::run() (this=0x7f4cb28b4d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x7f4cb28b4d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:360
#10 0x00007f4cae2766db in start_thread (arg=0x7f4c9bfff700) at pthread_create.c:463
#11 0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f4ca2042700 (LWP 2394)):
#0  0x00007f4cb0c35bf9 in __GI___poll (fds=0x7f4ca2041ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4cb5f46747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4cb5f4836a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4ca4a13e10 in QXcbEventQueue::run() (this=0x5557c28f7d60) at qxcbeventqueue.cpp:228
#4  0x00007f4cb1345b52 in QThreadPrivate::start(void*) (arg=0x5557c28f7d60) at thread/qthread_unix.cpp:360
#5  0x00007f4cae2766db in start_thread (arg=0x7f4ca2042700) at pthread_create.c:463
#6  0x00007f4cb0c4288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f4cb7506e40 (LWP 2378)):
[KCrash Handler]
#6  0x00007f4cb4bc0cd6 in QV4::MemoryManager::collectFromJSStack(QV4::MarkStack*) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4cb4bc0d3e in QV4::MemoryManager::collectRoots(QV4::MarkStack*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4cb4bc0f63 in QV4::MemoryManager::mark() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f4cb4bc2db9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f4cb4bc4e56 in QV4::MemoryManager::allocString(unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f4cb4d32d4a in QV4::ExecutionEngine::newString(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f4cb4c6eb0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f4cb4d484f1 in QV4::RuntimeHelpers::ordinaryToPrimitive(QV4::ExecutionEngine*, QV4::Object const*, QV4::String*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f4cb4d487a4 in QV4::RuntimeHelpers::objectDefaultValue(QV4::Object const*, int) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f4cb4d4d78a in QV4::Value::toQStringNoThrow() const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f4cb4d3cb48 in QV4::ExecutionEngine::catchExceptionAsQmlError() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f4cb4de3db4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f4cb4de4486 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f4cb4d89fb9 in QQmlBoundSignalExpression::evaluate(void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f4cb4d8b33b in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f4cb4dc4c42 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f4cb4d6bf99 in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007f4cb155b0f7 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x5557c31f4770, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f60e30) at kernel/qobject.cpp:3678
#24 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x5557c31f4770, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f60e30) at kernel/qobject.cpp:3660
#25 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=this@entry=0x5557c31f4770, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#26 0x00007f4cb14f88aa in QSortFilterProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1480
#27 0x00007f4cb14facf8 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:225
#28 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x5557c325e6d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61160) at kernel/qobject.cpp:3809
#29 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x5557c325e6d0, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61160) at kernel/qobject.cpp:3660
#30 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=this@entry=0x5557c325e6d0, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#31 0x00007f4cb14f88aa in QSortFilterProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1480
#32 0x00007f4cb14facf8 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:225
#33 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5557c31eedb0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61490) at kernel/qobject.cpp:3809
#34 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61490) at kernel/qobject.cpp:3660
#35 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#36 0x00007f4c785d152a in TaskManager::TaskGroupingProxyModel::Private::sourceDataChanged(QModelIndex, QModelIndex, QVector<int> const&) (this=0x5557c3220db0, topLeft=..., bottomRight=..., roles=...) at ./libtaskmanager/taskgroupingproxymodel.cpp:251
#37 0x00007f4c785d285d in TaskManager::TaskGroupingProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/libtaskmanager/taskmanager_autogen/include/moc_taskgroupingproxymodel.cpp:160
#38 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x5557c31ef3d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61740) at kernel/qobject.cpp:3809
#39 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x5557c31ef3d0, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61740) at kernel/qobject.cpp:3660
#40 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=this@entry=0x5557c31ef3d0, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#41 0x00007f4cb14f88aa in QSortFilterProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1480
#42 0x00007f4cb14facf8 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:225
#43 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5557c32d1e60, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61a70) at kernel/qobject.cpp:3809
#44 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61a70) at kernel/qobject.cpp:3660
#45 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#46 0x00007f4c78367202 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#47 0x00007f4c783686a8 in  () at /usr/lib/x86_64-linux-gnu/libKF5ItemModels.so.5
#48 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x5557c31e2bf0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61c70) at kernel/qobject.cpp:3809
#49 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x5557c31e2bf0, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61c70) at kernel/qobject.cpp:3660
#50 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=this@entry=0x5557c31e2bf0, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#51 0x00007f4cb14ed071 in QIdentityProxyModelPrivate::_q_sourceDataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, topLeft=..., bottomRight=..., roles=...) at itemmodels/qidentityproxymodel.cpp:483
#52 0x00007f4cb14eed48 in QIdentityProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qidentityproxymodel.cpp:164
#53 0x00007f4cb155b8d5 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5557c31e2d30, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=<optimized out>, argv@entry=0x7fff45f61e90) at kernel/qobject.cpp:3809
#54 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f4cb19df160 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff45f61e90) at kernel/qobject.cpp:3660
#55 0x00007f4cb14c634c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) (this=<optimized out>, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:557
#56 0x00007f4c785f2b50 in TaskManager::XWindowTasksModel::Private::dataChanged(unsigned long long, QVector<int> const&) (this=this@entry=0x5557c31e0090, window=<optimized out>, roles=...) at ./libtaskmanager/xwindowtasksmodel.cpp:408
#57 0x00007f4c785f5242 in TaskManager::XWindowTasksModel::Private::windowChanged(unsigned long long, QFlags<NET::Property>, QFlags<NET::Property2>) (this=0x5557c31e0090, window=<optimized out>, properties=..., properties2=...) at ./libtaskmanager/xwindowtasksmodel.cpp:395
#58 0x00007f4cb155b9ef in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fff45f620f0, r=0x5557c31e2d30, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#59 0x00007f4cb155b9ef in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5557c32d2710, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=<optimized out>, argv@entry=0x7fff45f620f0) at kernel/qobject.cpp:3789
#60 0x00007f4cb155bf97 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=<optimized out>, m=m@entry=0x7f4c78811500 <XWindowSystemEventBatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff45f620f0) at kernel/qobject.cpp:3660
#61 0x00007f4c785fa24b in XWindowSystemEventBatcher::windowChanged(unsigned long long, QFlags<NET::Property>, QFlags<NET::Property2>) (this=<optimized out>, _t1=<optimized out>, _t2=..., _t3=...) at ./obj-x86_64-linux-gnu/libtaskmanager/taskmanager_autogen/EWIEGA46WW/moc_xwindowsystemeventbatcher.cpp:176
#62 0x00007f4c785f1bc1 in XWindowSystemEventBatcher::<lambda(WId, NET::Properties, NET::Properties2)>::operator() (properties2=..., properties=..., window=<optimized out>, __closure=0x5557c31cdc80) at ./libtaskmanager/xwindowsystemeventbatcher.cpp:63
#63 0x00007f4c785f1bc1 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1, 2>, QtPrivate::List<long long unsigned int, QFlags<NET::Property>, QFlags<NET::Property2> >, void, XWindowSystemEventBatcher::XWindowSystemEventBatcher(QObject*)::<lambda(WId, NET::Properties, NET::Properties2)> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#64 0x00007f4c785f1bc1 in QtPrivate::Functor<XWindowSystemEventBatcher::XWindowSystemEventBatcher(QObject*)::<lambda(WId, NET::Properties, NET::Properties2)>, 3>::call<QtPrivate::List<unsigned long long, QFlags<NET::Property>, QFlags<NET::Property2> >, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#65 0x00007f4c785f1bc1 in QtPrivate::QFunctorSlotObject<XWindowSystemEventBatcher::XWindowSystemEventBatcher(QObject*)::<lambda(WId, NET::Properties, NET::Properties2)>, 3, QtPrivate::List<long long unsigned int, QFlags<NET::Property>, QFlags<NET::Property2> >, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x5557c31cdc70, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:439
#66 0x00007f4cb155b9ef in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fff45f622c0, r=0x5557c32d2710, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#67 0x00007f4cb155b9ef in QMetaObject::activate(QObject*, int, int, void**) (sender=0x7f4cb3f47c00, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3789
#68 0x00007f4cb3d38ecb in KWindowSystem::windowChanged(unsigned long long, QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#69 0x00007f4c9a7d08d6 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#70 0x00007f4cb152771f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (this=<optimized out>, eventType=..., message=message@entry=0x7f4c9c00ae20, result=result@entry=0x7fff45f623d8) at kernel/qabstracteventdispatcher.cpp:484
#71 0x00007f4ca49efbec in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (this=this@entry=0x5557c28e8f50, event=event@entry=0x7f4c9c00ae20) at qxcbconnection.cpp:542
#72 0x00007f4ca49f0716 in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5557c28e8f50, flags=flags@entry=...) at qxcbconnection.cpp:1021
#73 0x00007f4ca4a14dd3 in xcbSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at qxcbeventdispatcher.cpp:103
#74 0x00007f4caadaf417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f4caadaf650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f4caadaf6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007f4cb1588b7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5557c29396a0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#78 0x00007f4cb152906a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff45f62670, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#79 0x00007f4cb15323e0 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1403
#80 0x00005557c078acef in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:219

Possible duplicates by query: bug 414768, bug 409244, bug 406600, bug 402725, bug 400877.

Reported using DrKonqi
Comment 1 Christoph Feck 2020-01-31 07:56:57 UTC 

*** This bug has been marked as a duplicate of bug 414768 ***