Everything from git master, wayland, Fedora 35.

I hit Ctrl+Q in Kate, and Plasma crashed instead of Kate quitting.

Backtrace:

(gdb) bt
#0  __pthread_kill_implementation
    (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007f74b8a568f3 in __pthread_kill_internal (signo=6, threadid=<optimized out>)
    at pthread_kill.c:78
#2  0x00007f74b8a096a6 in __GI_raise (sig=6) at ../sysdeps/posix/raise.c:26
#3  0x00007f74bb579a09 in KCrash::defaultCrashHandler(int) (sig=6)
    at /home/nate/kde/src/kcrash/src/kcrash.cpp:624
#4  0x00007f74b8a09750 in <signal handler called> () at /lib64/libc.so.6
#5  __pthread_kill_implementation
    (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#6  0x00007f74b8a568f3 in __pthread_kill_internal (signo=6, threadid=<optimized out>)
    at pthread_kill.c:78
#7  0x00007f74b8a096a6 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x00007f74b89f37d3 in __GI_abort () at abort.c:79
#9  0x00007f74966376bc in _iris_batch_flush
    (batch=<optimized out>, file=<optimized out>, line=<optimized out>)
    at ../src/gallium/drivers/iris/iris_batch.c:969
#10 0x00007f7497284ec9 in iris_fence_flush (ctx=0x24265b0, out_fence=0x0, flags=<optimized out>)
    at ../src/gallium/drivers/iris/iris_fence.c:267
#11 0x00007f74966b7b37 in st_flush (flags=8, fence=0x0, st=0x2d5d110)
    at ../src/mesa/state_tracker/st_cb_flush.c:61
#12 st_glFlush (ctx=<optimized out>, gallium_flush_flags=8)
    at ../src/mesa/state_tracker/st_cb_flush.c:99
#13 0x00007f74a5489aed in QtWaylandClient::QWaylandGLContext::swapBuffers(QPlatformSurface*)
    (this=0x15f8d90, surface=0x1338ea0)
    at ../../../../hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp:500
#14 0x00007f74bb12b604 in QSGRenderThread::syncAndRender(QImage*) (this=0x15f8b30, grabImage=0x0)
    at scenegraph/qsgthreadedrenderloop.cpp:870
#15 0x00007f74bb12fa9d in QSGRenderThread::run() (this=0x15f8b30)
    at scenegraph/qsgthreadedrenderloop.cpp:1043
#16 0x00007f74b8fd24c6 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#17 0x00007f74b8a54b1a in start_thread (arg=<optimized out>) at pthread_create.c:443
#18 0x00007f74b8ad9650 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81