https://bugs.kde.org/show_bug.cgi?id=437925
--- Comment #3 from AK-47 <chkb...@safe-mail.net> ---
OK so an update. I reinstalled Fedora and the problem with the VM has gone.
However, there are other X11 apps that do this, which may be relevant here:
PID: 2483 (kwin_wayland)
UID: 1000 (<redacted>)
GID: 1000 (<redacted>)
Signal: 11 (SEGV)
Timestamp: Mon 2021-06-07 1
Command Line: kwin_wayland --wayland_fd 4 --xwayland
/usr/libexec/startplasma-waylandsession
Executable: /usr/bin/kwin_wayland
Control Group: /user.slice/user-1000.slice/session-2.scope
Unit: session-2.scope
Slice: user-1000.slice
Session: 2
Owner UID: 1000 (<redacted>)
Disk Size: 6.0M
Message: Process 2483 (kwin_wayland) of user 1000 dumped core.
Stack trace of thread 2483:
#0 0x00007f30d3f29b31 _ZNK4KWin16EffectWindowImpl5shapeEv
(libkwin.so.5 + 0x175b31)
#1 0x00007f30d3d6d1c3
_ZNK4KWin10BlurEffect10blurRegionEPKNS_12EffectWindowE.constprop.0
(libkwin4_effect_builtins.so.1 + 0xd51c3)
#2 0x00007f30d3ccfe9f
_ZN4KWin10BlurEffect14prePaintWindowEPNS_12EffectWindowERNS_18WindowPrePaintDataENSt6chrono8durationIlSt5ratioILl1ELl1000EEEE
(libkwin4_effect_builtins.so.1 + 0x37e9f)
#3 0x00007f30d3f1aafb
_ZN4KWin18EffectsHandlerImpl14prePaintWindowEPNS_12EffectWindowERNS_18WindowPrePaintDataENSt6chrono8durationIlSt5ratioILl1ELl1000EEEE
(libkwin.so.5 + 0x166afb)
#4 0x00007f30d3f1aafb
_ZN4KWin18EffectsHandlerImpl14prePaintWindowEPNS_12EffectWindowERNS_18WindowPrePaintDataENSt6chrono8durationIlSt5ratioILl1ELl1000EEEE
(libkwin.so.5 + 0x166afb)
#5 0x00007f30d3f90e3b
_ZN4KWin5Scene17paintSimpleScreenEiRK7QRegion (libkwin.so.5 + 0x1dce3b)
#6 0x00007f30d3f8b936
_ZN4KWin5Scene16finalPaintScreenEiRK7QRegionRNS_15ScreenPaintDataE
(libkwin.so.5 + 0x1d7936)
#7 0x00007f30d3f1fa48
_ZN4KWin18EffectsHandlerImpl11paintScreenEiRK7QRegionRNS_15ScreenPaintDataE
(libkwin.so.5 + 0x16ba48)
#8 0x00007f30d3f1fa48
_ZN4KWin18EffectsHandlerImpl11paintScreenEiRK7QRegionRNS_15ScreenPaintDataE
(libkwin.so.5 + 0x16ba48)
#9 0x00007f30d3f1fa48
_ZN4KWin18EffectsHandlerImpl11paintScreenEiRK7QRegionRNS_15ScreenPaintDataE
(libkwin.so.5 + 0x16ba48)
#10 0x00007f30d3f8dfe4
_ZN4KWin5Scene11paintScreenEPiRK7QRegionS4_PS2_S5_PNS_10RenderLoopERK10QMatrix4x4
(libkwin.so.5 + 0x1d9fe4)
#11 0x00007f30bcfaaaf8
_ZN4KWin11SceneOpenGL5paintEiRK7QRegionRK5QListIPNS_8ToplevelEEPNS_10RenderLoopE.part.0
(KWinSceneOpenGL.so + 0x20af8)
#12 0x00007f30d3eee6a8
_ZN4KWin10Compositor9compositeEPNS_10RenderLoopE (libkwin.so.5 + 0x13a6a8)
#13 0x00007f30d259cc99 _Z10doActivateILb0EEvP7QObjectiPPv
(libQt5Core.so.5 + 0x2d9c99)
#14 0x00007f30d3eb3ff6
_ZN4KWin10RenderLoop14frameRequestedEPS0_ (libkwin.so.5 + 0xffff6)
#15 0x00007f30d3f80c97 _ZN4KWin17RenderLoopPrivate8dispatchEv
(libkwin.so.5 + 0x1ccc97)
#16 0x00007f30d259cc99 _Z10doActivateILb0EEvP7QObjectiPPv
(libQt5Core.so.5 + 0x2d9c99)
#17 0x00007f30d259ff3e _ZN6QTimer7timeoutENS_14QPrivateSignalE
(libQt5Core.so.5 + 0x2dcf3e)
#18 0x00007f30d259379f _ZN7QObject5eventEP6QEvent
(libQt5Core.so.5 + 0x2d079f)
#19 0x00007f30d3397423
_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 +
0x1ae423)
#20 0x00007f30d2569098
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 +
0x2a6098)
#21 0x00007f30d25b9983 _ZN14QTimerInfoList14activateTimersEv
(libQt5Core.so.5 + 0x2f6983)
#22 0x00007f30d25b7f50
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x2f4f50)
#23 0x00005639e4f167a1
_ZN23QUnixEventDispatcherQPA13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(kwin_wayland + 0x8f7a1)
#24 0x00007f30d2567ab2
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2a4ab2)
#25 0x00007f30d256ffe4 _ZN16QCoreApplication4execEv
(libQt5Core.so.5 + 0x2acfe4)
#26 0x00005639e4eb91c9 main (kwin_wayland + 0x321c9)
#27 0x00007f30d1cedb75 __libc_start_main (libc.so.6 + 0x27b75)
#28 0x00005639e4eb9ace _start (kwin_wayland + 0x32ace)
Stack trace of thread 2486:
#0 0x00007f30d1dbb7bf __poll (libc.so.6 + 0xf57bf)
#1 0x00007f30cfd1047c g_main_context_iterate.constprop.0
(libglib-2.0.so.0 + 0xa947c)
#2 0x00007f30cfcb9c03 g_main_context_iteration
(libglib-2.0.so.0 + 0x52c03)
#3 0x00007f30d25ba698
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x2f7698)
#4 0x00007f30d2567ab2
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2a4ab2)
#5 0x00007f30d23ab25a _ZN7QThread4execEv (libQt5Core.so.5 +
0xe825a)
#6 0x00007f30d23ac456 _ZN14QThreadPrivate5startEPv
(libQt5Core.so.5 + 0xe9456)
#7 0x00007f30d21761c9 start_thread (libpthread.so.0 + 0x91c9)
#8 0x00007f30d1dc6463 __clone (libc.so.6 + 0x100463)
Stack trace of thread 3019:
#0 0x00007f30d218251a __fu
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