Application: plasmashell (5.26.0)
 (Compiled from sources)
Qt Version: 5.15.7
Frameworks Version: 5.99.0
Operating System: Linux 5.15.0-71-generic x86_64
Windowing System: X11
Distribution: KDE neon User - 5.26
DrKonqi: 5.26.0 [KCrashBackend]

-- Information about the crash:
I don't have much information, the KDE crash handler noticed the issue before I did. Apparently after I pressed enter on sddm to open up the system after sleep, plasma crashes. Sometimes (this is not consistent, sometimes it happens, sometimes it doesn't and I don't know how to exactly reproduce this), the panels from the 2nd monitor (not primary but the main laptop screen) are placed on the first monitor (primary monitor, HDMI external screen).
I'm ticking "KDE Platform is compiled from source" only because I'm using Kubuntu but with the KDE Neon repositories and plasma's most recent version (that is available for 20.04 LTS). It isn't actually from souce but I had no other way of signaling this.

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault

[New LWP 1236]
[New LWP 1242]
[New LWP 1266]
[New LWP 1325]
[New LWP 1339]
[New LWP 1369]
[New LWP 1370]
[New LWP 1379]
[New LWP 1457]
[New LWP 1574]
[New LWP 1575]
[New LWP 1879]
[New LWP 1880]
[New LWP 1938]
[New LWP 1979]
[New LWP 1981]
[New LWP 1993]
[New LWP 1995]
[New LWP 2249]
[New LWP 2250]
[New LWP 8982]
[New LWP 8984]
[New LWP 37110]
[New LWP 37111]
[New LWP 37137]
[New LWP 37138]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fa7263d199f in __GI___poll (fds=0x7ffe941a72b8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
python sentry-sdk not installed :(

[Current thread is 1 (Thread 0x7fa7224dc2c0 (LWP 1217))]

Thread 27 (Thread 0x7fa66629b700 (LWP 37138)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e35c498a4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e35c49850, cond=0x560e35c49878) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e35c49878, mutex=0x560e35c49850) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e35c49850) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e35f48120, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e35f48080) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fa66509a700 (LWP 37137)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e354ddc60) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e354ddc10, cond=0x560e354ddc38) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e354ddc38, mutex=0x560e354ddc10) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fa6a7fc3700 (LWP 37111)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e33c7e780) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e33c7e730, cond=0x560e33c7e758) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e33c7e758, mutex=0x560e33c7e730) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e33c7e730) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e34421000, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e34420f60) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fa6aa0d7700 (LWP 37110)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e36fb53a0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e36fb5350, cond=0x560e36fb5378) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e36fb5378, mutex=0x560e36fb5350) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fa681498700 (LWP 8984)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e36681e90) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e36681e40, cond=0x560e36681e68) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e36681e68, mutex=0x560e36681e40) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e36681e40) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e361915b0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e36191510) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fa681c99700 (LWP 8982)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e34a39ba0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e34a39b50, cond=0x560e34a39b78) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e34a39b78, mutex=0x560e34a39b50) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fa6a8fc5700 (LWP 2250)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e35a58624) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e35a585d0, cond=0x560e35a585f8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e35a585f8, mutex=0x560e35a585d0) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e35a585d0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e361ac5e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e361ac540) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fa6a97c6700 (LWP 2249)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e35d61a70) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e35d61a20, cond=0x560e35d61a48) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e35d61a48, mutex=0x560e35d61a20) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fa6ab321700 (LWP 1995)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e359a73a0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e359a7350, cond=0x560e359a7378) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e359a7378, mutex=0x560e359a7350) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e359a7350) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e35694840, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e356947a0) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fa6abb7e700 (LWP 1993)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e34781990) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e34781940, cond=0x560e34781968) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e34781968, mutex=0x560e34781940) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fa6ea24c700 (LWP 1981)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e35b85510) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e35b854c0, cond=0x560e35b854e8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e35b854e8, mutex=0x560e35b854c0) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e35b854c0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e35765ee0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e35765e40) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fa6e9a4b700 (LWP 1979)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e3625d8a0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e3625d850, cond=0x560e3625d878) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e3625d878, mutex=0x560e3625d850) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fa6a4d75700 (LWP 1938)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fa6d40145c0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fa6d4014570, cond=0x7fa6d4014598) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fa6d4014598, mutex=0x7fa6d4014570) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fa6a575a700 (LWP 1880)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e352006a4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e35200650, cond=0x560e35200678) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e35200678, mutex=0x560e35200650) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e35200650) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e351c76d0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e351c7630) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fa6b3fff700 (LWP 1879)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e367735c0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e36773570, cond=0x560e36773598) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e36773598, mutex=0x560e36773570) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fa6a67fc700 (LWP 1575)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e355a3ce0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e355a3c90, cond=0x560e355a3cb8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e355a3cb8, mutex=0x560e355a3c90) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e355a3c90) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x7fa6e4049c50, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x7fa6e4049bb0) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fa6a6ffd700 (LWP 1574)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e355d82f4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e355d82a0, cond=0x560e355d82c8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e355d82c8, mutex=0x560e355d82a0) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fa6d94f5700 (LWP 1457)):
#0  0x00007fa724b2b4dd in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa724adddac in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa724ade312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa7269a2f9b in QEventDispatcherGlib::processEvents (this=0x7fa6a0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7fa6d94f4ba0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#6  0x00007fa7267603a2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007fa6d88e00bc in KCupsConnection::run() () from /lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e34f24830) at thread/qthread_unix.cpp:330
#9  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fa6eaa4d700 (LWP 1379)):
#0  0x00007fa726761ae0 in QMutex::lock (this=this@entry=0x560e3331af30) at /usr/include/c++/9/bits/atomic_base.h:769
#1  0x00007fa7269a2e92 in QMutexLocker::QMutexLocker (m=0x560e3331af30, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:238
#2  QThreadData::canWaitLocked (this=0x560e3331af00) at ../../include/QtCore/5.15.7/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:279
#3  postEventSourcePrepare (s=0x7fa6dc004fe0, timeout=0x7fa6eaa4c9d4) at kernel/qeventdispatcher_glib.cpp:260
#4  0x00007fa724add8ef in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa724ade29b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fa7269a2f9b in QEventDispatcherGlib::processEvents (this=0x7fa6dc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#8  0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7fa6eaa4cba0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#9  0x00007fa7267603a2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#10 0x00007fa72834267a in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e333c3510) at thread/qthread_unix.cpp:330
#12 0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#13 0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fa6fdfb6700 (LWP 1370)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e332cef10) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e332ceec0, cond=0x560e332ceee8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e332ceee8, mutex=0x560e332ceec0) at pthread_cond_wait.c:647
#3  0x00007fa72676766b in QWaitConditionPrivate::wait (deadline=..., this=0x560e332ceec0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x560e32eaf9b0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fa728408444 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fa7284088b9 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e32eaf910) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fa6fffff700 (LWP 1369)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e3387ac00) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e3387abb0, cond=0x560e3387abd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e3387abd8, mutex=0x560e3387abb0) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fa70cec1700 (LWP 1339)):
#0  0x00007fa7263d199f in __GI___poll (fds=0x7fa6f8004e60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa724ade36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa7269a2f9b in QEventDispatcherGlib::processEvents (this=0x7fa6f8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7fa70cec0be0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007fa7267603a2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e33138160) at thread/qthread_unix.cpp:330
#7  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fa70de39700 (LWP 1325)):
#0  0x00007fa7263d199f in __GI___poll (fds=0x7fa704004a60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa724ade36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa7269a2f9b in QEventDispatcherGlib::processEvents (this=0x7fa704000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7fa70de38bc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007fa7267603a2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fa727fa4929 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x560e32e8c9c0) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fa719713700 (LWP 1266)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e328956b0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e32895660, cond=0x560e32895688) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e32895688, mutex=0x560e32895660) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fa719f54700 (LWP 1242)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x560e328604c8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x560e32860478, cond=0x560e328604a0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x560e328604a0, mutex=0x560e32860478) at pthread_cond_wait.c:647
#3  0x00007fa71a4385eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa71a4381eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fa72153d700 (LWP 1236)):
#0  0x00007fa7263d199f in __GI___poll (fds=0x7fa71c015660, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa724ade36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa7269a2f9b in QEventDispatcherGlib::processEvents (this=0x7fa71c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7fa72153cbb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007fa7267603a2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fa7272e3f4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fa7267615a3 in QThreadPrivate::start (arg=0x7fa727367d80) at thread/qthread_unix.cpp:330
#8  0x00007fa725f90609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa7263de133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fa7224dc2c0 (LWP 1217)):
[KCrash Handler]
#4  QScreen::geometry (this=0x0) at kernel/qscreen.cpp:419
#5  0x0000560e30e69d15 in PanelView::geometryByDistance (this=this@entry=0x560e367450d0, distance=0) at ./shell/panelview.cpp:533
#6  0x0000560e30e6a1a0 in PanelView::positionPanel (this=this@entry=0x560e367450d0) at ./shell/panelview.cpp:519
#7  0x0000560e30e6b673 in PanelView::updateFloating (this=this@entry=0x560e367450d0) at ./shell/panelview.cpp:1555
#8  0x0000560e30e6b728 in PanelView::handleQmlStatusChange (this=0x560e367450d0, status=<optimized out>) at ./shell/panelview.cpp:1373
#9  0x00007fa72697f622 in QtPrivate::QSlotObjectBase::call (a=0x7ffe941a8870, r=0x560e367450d0, this=0x560e35b02ad0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#10 doActivate<false> (sender=0x560e367450d0, signal_index=38, argv=0x7ffe941a8870) at kernel/qobject.cpp:3919
#11 0x00007fa7269788b7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fa728d1cac0 <KQuickAddons::QuickViewSharedEngine::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe941a8870) at kernel/qobject.cpp:3979
#12 0x00007fa728d14cb2 in KQuickAddons::QuickViewSharedEngine::statusChanged (this=<optimized out>, _t1=<optimized out>) at ./obj-x86_64-linux-gnu/src/quickaddons/KF5QuickAddons_autogen/include/moc_quickviewsharedengine.cpp:251
#13 0x00007fa72697f622 in QtPrivate::QSlotObjectBase::call (a=0x7ffe941a8990, r=0x560e367450d0, this=0x560e3565f1d0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#14 doActivate<false> (sender=0x560e355ca180, signal_index=4, argv=0x7ffe941a8990) at kernel/qobject.cpp:3919
#15 0x00007fa7269788b7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fa7289bdb60 <KDeclarative::QmlObject::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe941a8990) at kernel/qobject.cpp:3979
#16 0x00007fa7289b6415 in KDeclarative::QmlObject::statusChanged (this=<optimized out>, _t1=<optimized out>) at ./obj-x86_64-linux-gnu/src/kdeclarative/KF5Declarative_autogen/include/moc_qmlobject.cpp:241
#17 0x00007fa726976039 in QObject::event (this=0x560e355ca180, e=0x560e359c9b00) at kernel/qobject.cpp:1347
#18 0x00007fa72767fe53 in QApplicationPrivate::notify_helper (this=this@entry=0x560e3272eec0, receiver=receiver@entry=0x560e355ca180, e=e@entry=0x560e359c9b00) at kernel/qapplication.cpp:3637
#19 0x00007fa727688c68 in QApplication::notify (this=0x7ffe941a9060, receiver=0x560e355ca180, e=0x560e359c9b00) at kernel/qapplication.cpp:3161
#20 0x00007fa7269480aa in QCoreApplication::notifyInternal2 (receiver=0x560e355ca180, event=0x560e359c9b00) at ../../include/QtCore/5.15.7/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:332
#21 0x00007fa72694a9b1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x560e32708ef0) at kernel/qcoreapplication.cpp:1821
#22 0x00007fa7269a3927 in postEventSourceDispatch (s=0x560e32859950) at kernel/qeventdispatcher_glib.cpp:277
#23 0x00007fa724ade17d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fa724ade400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fa724ade4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fa7269a2f82 in QEventDispatcherGlib::processEvents (this=0x560e3285e5b0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#27 0x00007fa726946bab in QEventLoop::exec (this=this@entry=0x7ffe941a8f20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#28 0x00007fa72694ed54 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#29 0x0000560e30e517ec in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:233
[Inferior 1 (process 1217) detached]

The reporter indicates this bug may be a duplicate of or related to bug 461909, bug 465040.

Reported using DrKonqi