Bug 410165

Summary: Plasma crashed in QDrag::dragCursor() when dragging widget onto the Activities Manager
Product: [Plasma] plasmashell Reporter: kostasmoustaklem+KDEBugtracking
Component: Activity Switcher sidebarAssignee: Ivan Čukić <ivan.cukic>
Status: RESOLVED WORKSFORME    
Severity: crash CC: bugseforuns, jnorichards, kde, nate, notmart, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.14.5   
Target Milestone: 1.0   
Platform: Debian stable   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kostasmoustaklem+KDEBugtracking 2019-07-24 20:14:27 UTC 
Application: plasmashell (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-5-amd64 x86_64
Distribution: Debian GNU/Linux 10 (buster)

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

I unlocked widgets to add one to the desktop. I then open the widgets sidebar with desktop still in view, I then drag a Folder View widget out to the desktop, in order to place it. Before placing it, I changed my mind and wanted to undo and so I dragged back the widget to the sidebar, but the Activities Manager sidebar showed up because I have it pinned to my left screen edge. I then kept hovering there thinking I could potentially switch Activities while holding the widget so I place it in my desired Activity's desktop and that's when the crash occured.

-- 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 0x7f17e277b840 (LWP 1985))]

Thread 21 (Thread 0x7f171f7fe700 (LWP 13519)):
#0  0x00007f17e3785ff9 in pa_pstream_ref () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#1  0x00007f17e3786b71 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#2  0x00007f17e37873ca in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#3  0x00007f17e54dfca8 in pa_mainloop_dispatch () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54dff7c in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#8  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f171ffff700 (LWP 13516)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f1714004820, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e54ee101 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f17e54df920 in pa_mainloop_poll () at /lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f17e54dff6e in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#7  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f17922b8700 (LWP 13513)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f1734004800, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e54ee101 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f17e54df920 in pa_mainloop_poll () at /lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f17e54dff6e in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#7  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f17919ec700 (LWP 13510)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f1748004800, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e54ee101 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f17e54df920 in pa_mainloop_poll () at /lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f17e54dff6e in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#7  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f17997f7700 (LWP 13507)):
#0  0x00007f17e777a494 in __GI___libc_read (nbytes=10, buf=0x7f17997f6b9e, fd=78) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f17e777a494 in __GI___libc_read (fd=78, buf=0x7f17997f6b9e, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f17e3767fc1 in pa_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#3  0x00007f17e54df4fe in pa_mainloop_prepare () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54dff60 in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#8  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f179b1da700 (LWP 6655)):
#0  0x00007f17e777a494 in __GI___libc_read (nbytes=10, buf=0x7f179b1d9b9e, fd=61) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f17e777a494 in __GI___libc_read (fd=61, buf=0x7f179b1d9b9e, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f17e3767fc1 in pa_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#3  0x00007f17e54df4fe in pa_mainloop_prepare () at /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f17e54dff60 in pa_mainloop_iterate () at /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f17e54e0020 in pa_mainloop_run () at /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f17e54ee049 in  () at /lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f17e37974f8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-12.2.so
#8  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f17937fe700 (LWP 6025)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f1793fff700 (LWP 6024)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#16 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#17 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#18 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#19 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#20 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#21 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#22 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#23 0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#24 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#26 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f179bfff700 (LWP 6023)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f17a8a74700 (LWP 6022)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f17a9275700 (LWP 6021)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f17a9a76700 (LWP 6020)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f17aa277700 (LWP 6019)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#16 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#17 0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#18 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#20 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f17aac1b700 (LWP 6018)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f1300362d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f130036280, cond=0x55f1300362a8) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f1300362a8, mutex=0x55f130036280) at pthread_cond_wait.c:655
#3  0x00007f17e7a9825b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17cc442d30 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f17cc446ae8 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f17cc446b42 in  () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f17cc441e3d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f17cc444bb9 in ThreadWeaver::Thread::run() () at /lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#14 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f17b1394700 (LWP 4095)):
#0  0x00007f17e9ed832b in update_get_addr (ti=<optimized out>) at ../elf/dl-tls.c:807
#1  0x00007f17e9edd1f8 in __tls_get_addr () at ../sysdeps/x86_64/tls_get_addr.S:55
#2  0x00007f17e7a96e26 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f17e7c90cc1 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17e5872b11 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f17e58730e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f17e587325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f17e7c9087b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f17e7a8dec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f17cd4a0700 (LWP 2167)):
#0  0x00007f17e77967d2 in __libc_disable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:85
#1  0x00007f17e777a4a9 in __GI___libc_read (nbytes=16, buf=0x7f17cd49fb00, fd=18) at ../sysdeps/unix/sysv/linux/read.c:26
#2  0x00007f17e777a4a9 in __GI___libc_read (fd=18, buf=0x7f17cd49fb00, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#3  0x00007f17e58b8aa0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f17e5872c0f in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f17e58730e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f17e587325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f17e7c9087b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f17e7a8dec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f17e9645476 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#13 0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f17d9005700 (LWP 2097)):
#0  0x00007f17e69ba00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55f12c83c40c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f17e69ba00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f12c83c3b8, cond=0x55f12c83c3e0) at pthread_cond_wait.c:502
#2  0x00007f17e69ba00c in __pthread_cond_wait (cond=0x55f12c83c3e0, mutex=0x55f12c83c3b8) at pthread_cond_wait.c:655
#3  0x00007f17d95eae03 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f17d95eab57 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f17db5ef700 (LWP 2050)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f17d0004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e5873136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f17e587325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f17e7c9087b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f17e7a8dec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f17e93c0c65 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f17e0c7a700 (LWP 2003)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f17d4021810, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e5873136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f17e587325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f17e7c9087b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f17e7a8dec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f17e84ca545 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f17e19cd700 (LWP 1997)):
#0  0x00007f17e777e819 in __GI___poll (fds=0x7f17e19ccc78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f17e9a91cf7 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f17e9a9391a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f17e2319d79 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f17e7a97aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f17e69b3fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f17e77894cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f17e277b840 (LWP 1985)):
[KCrash Handler]
#6  0x00007f17e8022653 in QDrag::dragCursor(Qt::DropAction) const () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007f17e8025f83 in QBasicDrag::updateCursor(Qt::DropAction) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f17e2348657 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#9  0x00007f17e2348955 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#10 0x00007f17e234a66f in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#11 0x00007f17e8025184 in QBasicDrag::eventFilter(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f17e7c3f18b in QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f17e87394e8 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f17e8740950 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f17e7c3f5a9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f17e7fecfe3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f17e7feee25 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f17e7fc906b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007f17e23b03eb in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f17e8026125 in QBasicDrag::drag(QDrag*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#22 0x00007f17e80222a5 in QDragManager::drag(QDrag*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#23 0x00007f17e802255b in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#24 0x00007f17cd983845 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so
#25 0x00007f17cd9841cc in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so
#26 0x00007f17cd98435c in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so
#27 0x00007f17e971d091 in QQuickWindowPrivate::sendFilteredPointerEventImpl(QQuickPointerEvent*, QQuickItem*, QQuickItem*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#28 0x00007f17e972219e in QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#29 0x00007f17e9722d3b in QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#30 0x00007f17e972366f in QQuickWindowPrivate::handleMouseEvent(QMouseEvent*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#31 0x00007f17e7ff91d5 in QWindow::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#32 0x00007f17e97252db in QQuickWindow::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#33 0x00007f17e9e4ec03 in PlasmaQuick::Dialog::event(QEvent*) () at /lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#34 0x00007f17e87394b1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f17e8740950 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f17e7c3f5a9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f17e7fecfe3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#38 0x00007f17e7feee25 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#39 0x00007f17e7fc906b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#40 0x00007f17e23b03eb in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#41 0x00007f17e7c3e27b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007f17e7c46262 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x000055f12c2841ab in  ()
#44 0x00007f17e76b409b in __libc_start_main (main=0x55f12c2836a0, argc=1, argv=0x7ffd591e8218, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd591e8208) at ../csu/libc-start.c:308
#45 0x000055f12c28462a in _start ()
[Inferior 1 (process 1985) detached]

Reported using DrKonqi
Comment 1 Marco Martin 2019-12-09 17:25:11 UTC 
*** Bug 414942 has been marked as a duplicate of this bug. ***
Comment 2 David Edmundson 2021-04-11 16:46:23 UTC 
Crash is deep in Qt and against an old Qt. 

I also don't understand the activity bar setup. It hides when dragging widgets. Maybe that's something that changed over the last two years.

Please reopen if you can reproduce