Bug 416162

Summary: Crash in QQuickItemViewTransitionableItem::startTransition
Product: [Plasma] plasmashell Reporter: Syver Stensholt <sssandum>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED UPSTREAM    
Severity: crash CC: cirlo_ca, david.grasinar, eliraz.kedmi, jasoncollege24, kamikazow, kde, plasma-bugs, sunxuanmailbox, vanbreukelingen1979
Priority: NOR Keywords: drkonqi
Version: 5.16.5   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:

Description Syver Stensholt 2020-01-12 13:34:24 UTC 
Application: plasmashell (5.16.5)

Qt Version: 5.12.4
Frameworks Version: 5.62.0
Operating System: Linux 5.3.0-26-generic x86_64
Distribution: Ubuntu 19.10

-- Information about the crash:
- What I was doing when the application crashed:
The crash happens most of the times it goes in or out of standby mode. I see the error after logging in from the KDE Plasma "lockscreen"; "segmentation fault". I think I have noticed similar but not the same issues online with people having two screens. I have a 4K and a 1080p screen side by side.

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 0x7fe00ac00880 (LWP 1727))]

Thread 32 (Thread 0x7fdf9ffff700 (LWP 10086)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fdf9804f580) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf337a4368, cond=0x7fdf9804f558) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x7fdf9804f558, mutex=0x55bf337a4368) at pthread_cond_wait.c:638
#3  0x00007fe0106b1b22 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007fe0106b362a in xcb_wait_for_special_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007fe00115d31e in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#6  0x00007fe00115d488 in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#7  0x00007fe00115e69e in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#8  0x00007fe00115f5ec in glPrimitiveBoundingBox () at /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#9  0x00007fdffab3395d in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#10 0x00007fdffab35985 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#11 0x00007fdffafd3c8a in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#12 0x00007fdffafd42e0 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#13 0x00007fdffb187d75 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#14 0x00007fdffb18c7dd in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#15 0x00007fe010277056 in QSGBatchRenderer::Renderer::renderBatches() () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007fe01027c8e4 in QSGBatchRenderer::Renderer::render() () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007fe01026d420 in QSGRenderer::renderScene(QSGBindable const&) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007fe01026d8e3 in QSGRenderer::renderScene(unsigned int) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007fe0102aaa34 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007fe01030fcf0 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007fe0102b6c68 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007fe0102ba9d8 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#25 0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 31 (Thread 0x7fdfc0966700 (LWP 10085)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf3471a738) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf3471a6e8, cond=0x55bf3471a710) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf3471a710, mutex=0x55bf3471a6e8) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7fdf6a7fc700 (LWP 9947)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf36c9a644) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf36c9a5f0, cond=0x55bf36c9a618) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf36c9a618, mutex=0x55bf36c9a5f0) at pthread_cond_wait.c:638
#3  0x00007fe00e4a1def in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e4a1ee1 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0102ba7b9 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fe0102baa1a in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7fdf46efd700 (LWP 9946)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf36f34b48) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf36f34af8, cond=0x55bf36f34b20) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf36f34b20, mutex=0x55bf36f34af8) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fdf6bfff700 (LWP 2485)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf36ab38f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf36ab38a0, cond=0x55bf36ab38c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf36ab38c8, mutex=0x55bf36ab38a0) at pthread_cond_wait.c:638
#3  0x00007fe00e4a1def in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e4a1ee1 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0102ba7b9 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fe0102baa1a in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fdf94da2700 (LWP 2484)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf36bd95b8) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf36bd9568, cond=0x55bf36bd9590) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf36bd9590, mutex=0x55bf36bd9568) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fdf84ad5700 (LWP 2408)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf35f28db4) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf35f28d60, cond=0x55bf35f28d88) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf35f28d88, mutex=0x55bf35f28d60) at pthread_cond_wait.c:638
#3  0x00007fe00e4a1def in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e4a1ee1 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0102ba7b9 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fe0102baa1a in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fdf852d6700 (LWP 2407)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf35ff5afc) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf35ff5aa8, cond=0x55bf35ff5ad0) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf35ff5ad0, mutex=0x55bf35ff5aa8) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fdf86387700 (LWP 2402)):
#0  0x00007fe00e113c2f in __GI___poll (fds=0x7fdf800029e0, nfds=1, timeout=3499609) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe00ce44a3e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe00ce44b73 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe00e6ba6c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e66163b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe00e49aa75 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fdf86b5e01c in KCupsConnection::run() () at /lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fdf9dbb3700 (LWP 2399)):
#0  0x00007fe00e113c2f in __GI___poll (fds=0x7fdf8c0029e0, nfds=1, timeout=9609) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe00ce44a3e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe00ce44b73 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe00e6ba6c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e66163b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe00e49aa75 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fdf9f5fe700 (LWP 2158)):
#0  0x00007fe00e113c2f in __GI___poll (fds=0x7fdf90857490, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe00ce44a3e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe00ce44b73 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe00e6ba6c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e66163b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe00e49aa75 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe0102328aa in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fdfc17dc700 (LWP 2151)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf344b3850) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf344b3800, cond=0x55bf344b3828) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf344b3828, mutex=0x55bf344b3800) at pthread_cond_wait.c:638
#3  0x00007fe00e4a1def in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e4a1ee1 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe0102ba7b9 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fe0102baa1a in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fdfc2ffd700 (LWP 2150)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf345da2b8) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf345da268, cond=0x55bf345da290) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf345da290, mutex=0x55bf345da268) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fdfc37fe700 (LWP 2065)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c37af0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c37aa0, cond=0x55bf33c37ac8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c37ac8, mutex=0x55bf33c37aa0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fdfc3fff700 (LWP 2064)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c37af0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c37aa0, cond=0x55bf33c37ac8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c37ac8, mutex=0x55bf33c37aa0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fdfecdfa700 (LWP 2063)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c37af0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c37aa0, cond=0x55bf33c37ac8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c37ac8, mutex=0x55bf33c37aa0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fdfed5fb700 (LWP 2062)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c37af0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c37aa0, cond=0x55bf33c37ac8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c37ac8, mutex=0x55bf33c37aa0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fdfeddfc700 (LWP 2061)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fdfee5fd700 (LWP 2059)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fdfeedfe700 (LWP 2058)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fdfef5ff700 (LWP 2057)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fdfefe00700 (LWP 2056)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fdff8a50700 (LWP 2055)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fdff9251700 (LWP 2054)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fdff9a52700 (LWP 2053)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fdffa253700 (LWP 2052)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c373f0) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c373a0, cond=0x55bf33c373c8) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c373c8, mutex=0x55bf33c373a0) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fdffaa54700 (LWP 2051)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c339f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c339a8, cond=0x55bf33c339d0) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c339d0, mutex=0x55bf33c339a8) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe000dc5700 (LWP 2050)):
#0  0x00007fe00d9252c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bf33c32cb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fe00d9252c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55bf33c32c68, cond=0x55bf33c32c90) at pthread_cond_wait.c:508
#2  0x00007fe00d9252c6 in __pthread_cond_wait (cond=0x55bf33c32c90, mutex=0x55bf33c32c68) at pthread_cond_wait.c:638
#3  0x00007fdffb2b54bb in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fdffb2b50db in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe002dee700 (LWP 1815)):
#0  0x00007fe00e113c2f in __GI___poll (fds=0x7fdff40025e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe00ce44a3e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe00ce44b73 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe00e6ba6c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe00e66163b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe00e49aa75 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe00ff5d319 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe003fff700 (LWP 1759)):
#0  0x00007fe00e10f2ac in __GI___libc_read (nbytes=16, buf=0x7fe003ffeae0, fd=7) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe00e10f2ac in __GI___libc_read (fd=7, buf=0x7fe003ffeae0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fe00ce8c63f in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe00ce4458e in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe00ce449e2 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe00ce44b73 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fe00e6ba6c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe00e66163b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe00e49aa75 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe00ef7fefa in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#12 0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe009262700 (LWP 1743)):
#0  0x00007fe00e113c2f in __GI___poll (fds=0x7fe009261c28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe0106b1917 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe0106b353a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe009a0e288 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fe00e49bcc2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe00d91e669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#6  0x00007fe00e120323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe00ac00880 (LWP 1727)):
[KCrash Handler]
#6  0x0000000000000051 in  ()
#7  0x00007fe0103f88fa in QQuickItemViewTransitionableItem::startTransition(QQuickItemViewTransitioner*, int) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fe008630c0b in  () at /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#9  0x00007fe00862e4dd in QQuickStackView::replace(QQmlV4Function*) () at /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#10 0x00007fe008656e4c in  () at /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#11 0x00007fe008657393 in QQuickStackView::qt_metacall(QMetaObject::Call, int, void**) () at /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#12 0x00007fe00feaa6cf in QQmlVMEMetaObject::metaCall(QObject*, QMetaObject::Call, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007fe00ff004e5 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007fe00fe04eee in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007fe00fe888c6 in QV4::Runtime::method_callPropertyLookup(QV4::ExecutionEngine*, QV4::Value*, unsigned int, QV4::Value*, int) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007fdfc001d87d in  ()
#17 0x0000000000000000 in  ()
[Inferior 1 (process 1727) detached]

Reported using DrKonqi
Comment 1 Syver Stensholt 2020-01-12 13:40:10 UTC 
Also, the plasma desktop environment is not there after the crash if it wasn't clear. I can restore it sometimes with the following command; "kbuildsycoca5 && kquitapp5 plasmashell && kstart5 plasmashell" as found on other peoples threads having similar bugs. When running the command it sometimes stops with this error:
kf5.kconfig.core: "KConfigIni: In file /usr/share/kservices5/searchproviders/google_advanced.desktop, line 123: " "Invalid escape sequence \"\\{\"."
"Application plasmashell could not be found using service org.kde.plasmashell and path /MainApplication."
However, just running kstart5 plasmashell seems to restore the desktop environment just fine.
Comment 2 David Edmundson 2021-02-03 00:07:52 UTC 
*** Bug 415386 has been marked as a duplicate of this bug. ***
Comment 3 David Edmundson 2021-02-03 00:08:02 UTC 
*** Bug 412603 has been marked as a duplicate of this bug. ***
Comment 4 David Edmundson 2021-02-03 00:08:07 UTC 
*** Bug 411575 has been marked as a duplicate of this bug. ***
Comment 5 David Edmundson 2021-02-03 00:08:12 UTC 
*** Bug 412129 has been marked as a duplicate of this bug. ***
Comment 6 David Edmundson 2021-02-03 00:08:17 UTC 
*** Bug 411605 has been marked as a duplicate of this bug. ***
Comment 7 David Edmundson 2021-02-03 00:08:22 UTC 
*** Bug 408768 has been marked as a duplicate of this bug. ***
Comment 8 David Edmundson 2021-02-03 00:08:29 UTC 
*** Bug 408178 has been marked as a duplicate of this bug. ***
Comment 9 David Edmundson 2021-02-03 00:08:40 UTC 
*** Bug 406535 has been marked as a duplicate of this bug. ***
Comment 10 David Edmundson 2021-02-03 00:08:47 UTC 
*** Bug 405237 has been marked as a duplicate of this bug. ***
Comment 11 David Edmundson 2021-02-03 00:09:43 UTC 
Should be fixed by https://codereview.qt-project.org/c/qt%2Ftqtc-qtdeclarative/+/331112