Application: plasmashell (5.17.0)
 (Compiled from sources)
Qt Version: 5.13.1
Frameworks Version: 5.63.0
Operating System: Linux 4.15.0-65-generic x86_64
Distribution: KDE neon User Edition 5.17

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

My session had been idle and went to the lock screen.  It locked up with the time displayed and required a hard restart.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7a50ee9800 (LWP 1545))]

Thread 30 (Thread 0x7f79a99ae700 (LWP 1784)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8d3804d0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8d380480, cond=0x561d8d3804a8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8d3804a8, mutex=0x561d8d380480) at pthread_cond_wait.c:655
#3  0x00007f7a4ad22b0b in QWaitConditionPrivate::wait (deadline=..., this=0x561d8d380480) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x561d8d34b340, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f7a4ad22e19 in QWaitCondition::wait (this=0x561d8d34b348, mutex=0x561d8d34b340, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f7a4ed41ec8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f7a4ed422fa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f7a4ad1bb72 in QThreadPrivate::start (arg=0x561d8d34b2c0) at thread/qthread_unix.cpp:360
#9  0x00007f7a47c4d6db in start_thread (arg=0x7f79a99ae700) at pthread_create.c:463
#10 0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7f79aa1af700 (LWP 1783)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8d407b5c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8d407b08, cond=0x561d8d407b30) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8d407b30, mutex=0x561d8d407b08) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79aa1af700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f79ebfff700 (LWP 1760)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c56b400) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c56b3b0, cond=0x561d8c56b3d8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c56b3d8, mutex=0x561d8c56b3b0) at pthread_cond_wait.c:655
#3  0x00007f7a4ad22b0b in QWaitConditionPrivate::wait (deadline=..., this=0x561d8c56b3b0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x7f7a340043e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f7a4ad22e19 in QWaitCondition::wait (this=0x7f7a340043e8, mutex=0x7f7a340043e0, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#6  0x00007f7a4ed41ec8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f7a4ed422fa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f7a4ad1bb72 in QThreadPrivate::start (arg=0x7f7a34004360) at thread/qthread_unix.cpp:360
#9  0x00007f7a47c4d6db in start_thread (arg=0x7f79ebfff700) at pthread_create.c:463
#10 0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f79b0b59700 (LWP 1759)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8d2f930c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8d2f92b8, cond=0x561d8d2f92e0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8d2f92e0, mutex=0x561d8d2f92b8) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79b0b59700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f79f0ff9700 (LWP 1746)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bc5dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bc588, cond=0x561d8c8bc5b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bc5b0, mutex=0x561d8c8bc588) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f0ff9700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f79f17fa700 (LWP 1745)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bc5dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bc588, cond=0x561d8c8bc5b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bc5b0, mutex=0x561d8c8bc588) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f17fa700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f79f1ffb700 (LWP 1744)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bc5dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bc588, cond=0x561d8c8bc5b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bc5b0, mutex=0x561d8c8bc588) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f1ffb700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f79f27fc700 (LWP 1743)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bc5dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bc588, cond=0x561d8c8bc5b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bc5b0, mutex=0x561d8c8bc588) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f27fc700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f79f2ffd700 (LWP 1742)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bc5dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bc588, cond=0x561d8c8bc5b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bc5b0, mutex=0x561d8c8bc588) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f2ffd700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f79f37fe700 (LWP 1741)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f37fe700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f79f3fff700 (LWP 1740)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f79f3fff700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f7a10ff9700 (LWP 1739)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a10ff9700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f7a117fa700 (LWP 1738)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a117fa700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f7a11ffb700 (LWP 1737)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a11ffb700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f7a127fc700 (LWP 1736)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a127fc700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f7a12ffd700 (LWP 1735)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a12ffd700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f7a13fff700 (LWP 1734)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a13fff700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f7a18ff9700 (LWP 1733)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a18ff9700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f7a197fa700 (LWP 1732)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a197fa700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f7a19ffb700 (LWP 1731)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a19ffb700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f7a1a7fc700 (LWP 1730)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8bbed4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bbe80, cond=0x561d8c8bbea8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8bbea8, mutex=0x561d8c8bbe80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a1a7fc700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f7a1affd700 (LWP 1729)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8badf8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bada8, cond=0x561d8c8badd0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8badd0, mutex=0x561d8c8bada8) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a1affd700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f7a1b7fe700 (LWP 1728)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8badf8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bada8, cond=0x561d8c8badd0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8badd0, mutex=0x561d8c8bada8) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a1b7fe700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f7a137fe700 (LWP 1727)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8badf8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bada8, cond=0x561d8c8badd0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8badd0, mutex=0x561d8c8bada8) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a137fe700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f7a1bfff700 (LWP 1726)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8badf8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8bada8, cond=0x561d8c8badd0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8badd0, mutex=0x561d8c8bada8) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a1bfff700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f7a2145d700 (LWP 1725)):
#0  0x00007f7a47c539f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561d8c8b7cd0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x561d8c8b7c80, cond=0x561d8c8b7ca8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x561d8c8b7ca8, mutex=0x561d8c8b7c80) at pthread_cond_wait.c:655
#3  0x00007f7a2718fa3b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f7a2718f8a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a2145d700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f7a337b2700 (LWP 1670)):
#0  0x00007f7a4a60bbf9 in __GI___poll (fds=0x7f7a28004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7a445445c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7a445446dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7a4af5e9db in QEventDispatcherGlib::processEvents (this=0x7f7a28000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7a4aefeeaa in QEventLoop::exec (this=this@entry=0x7f7a337b1d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f7a4ad1a3ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f7a4e7e8cb5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f7a4ad1bb72 in QThreadPrivate::start (arg=0x561d8c6e93c0) at thread/qthread_unix.cpp:360
#8  0x00007f7a47c4d6db in start_thread (arg=0x7f7a337b2700) at pthread_create.c:463
#9  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7a39889700 (LWP 1561)):
#0  0x00007f7a4a60bbf9 in __GI___poll (fds=0x7f7a2c004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7a445445c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7a445446dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7a4af5e9db in QEventDispatcherGlib::processEvents (this=0x7f7a2c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7a4aefeeaa in QEventLoop::exec (this=this@entry=0x7f7a39888d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f7a4ad1a3ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f7a4c0120e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f7a4ad1bb72 in QThreadPrivate::start (arg=0x7f7a4c289d80) at thread/qthread_unix.cpp:360
#8  0x00007f7a47c4d6db in start_thread (arg=0x7f7a39889700) at pthread_create.c:463
#9  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f7a3ba72700 (LWP 1555)):
#0  0x00007f7a4a60bbf9 in __GI___poll (fds=0x7f7a3ba71ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7a4f918747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f7a4f91a36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f7a3e443f00 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f7a4ad1bb72 in QThreadPrivate::start (arg=0x561d8c542cc0) at thread/qthread_unix.cpp:360
#5  0x00007f7a47c4d6db in start_thread (arg=0x7f7a3ba72700) at pthread_create.c:463
#6  0x00007f7a4a61888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f7a50ee9800 (LWP 1545)):
[KCrash Handler]
#6  0x00007f7a4aec7dc0 in QSortFilterProxyModelPrivate::build_source_to_proxy_mapping (proxy_to_source=..., source_to_proxy=..., this=0x561d8cf89950) at itemmodels/qsortfilterproxymodel.cpp:1184
#7  0x00007f7a4aecc681 in QSortFilterProxyModelPrivate::sort (this=0x561d8cf89950) at itemmodels/qsortfilterproxymodel.cpp:615
#8  0x00007f79b16ec260 in Image::backgroundsFound (this=0x561d8cf90a50) at ./wallpapers/image/image.cpp:641
#9  0x00007f7a4af3182f in QtPrivate::QSlotObjectBase::call (a=0x7ffc219c7cd0, r=0x561d8cf90a50, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#10 QMetaObject::activate (sender=0x561d8cf8ebf0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3789
#11 0x00007f7a4af32272 in QObject::event (this=0x561d8cf8ebf0, e=<optimized out>) at kernel/qobject.cpp:1260
#12 0x00007f7a4c867eac in QApplicationPrivate::notify_helper (this=this@entry=0x561d8c51bf90, receiver=receiver@entry=0x561d8cf8ebf0, e=e@entry=0x7f79b802d870) at kernel/qapplication.cpp:3703
#13 0x00007f7a4c86f4b0 in QApplication::notify (this=0x7ffc219c83f0, receiver=0x561d8cf8ebf0, e=0x7f79b802d870) at kernel/qapplication.cpp:3449
#14 0x00007f7a4af00d48 in QCoreApplication::notifyInternal2 (receiver=0x561d8cf8ebf0, event=0x7f79b802d870) at kernel/qcoreapplication.cpp:1095
#15 0x00007f7a4af00f1e in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7f79b802d870) at kernel/qcoreapplication.cpp:1490
#16 0x00007f7a4af03667 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x561d8c511b40) at kernel/qcoreapplication.cpp:1840
#17 0x00007f7a4af03bf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1694
#18 0x00007f7a4af5f3a3 in postEventSourceDispatch (s=0x561d8c58dd70) at kernel/qeventdispatcher_glib.cpp:277
#19 0x00007f7a44544417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f7a44544650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f7a445446dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f7a4af5e9bf in QEventDispatcherGlib::processEvents (this=0x561d8c580a90, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#23 0x00007f7a4aefeeaa in QEventLoop::exec (this=this@entry=0x7ffc219c82a0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#24 0x00007f7a4af08220 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1403
#25 0x0000561d8b0d2cef in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:219

Possible duplicates by query: bug 413082, bug 413018, bug 413016, bug 412977, bug 412462.

Reported using DrKonqi