SUMMARY

plasmashell crashed sometimes when using task manager icons with the error The Wayland connection experienced a fatal error: Invalid argument This type of crash has occurred several times when using a Fedora Rawhide/38 KDE Plasma live images after I started Firefox or Dolphin from the icons in the task manager, sometimes by right-clicking from the context menus, or selecting Unpin from the Task Manager, or closing them from the icons. plasmashell restarted automatically after each crash. The journals from the times of the crashes showed errors like kwin_wayland_wrapper: invalid object/method in some form and always plasmashell: The Wayland connection experienced a fatal error: Invalid argument. The following example was when I started Firefox from the task manager icon by left-clicking on it.

Nov 04 01:06:24 plasmashell[1795]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x562e13820fe0)
Nov 04 01:06:24 plasmashell[1795]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x562e13820fe0)
Nov 04 01:06:24 plasmashell[1795]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x562e13820fe0)
Nov 04 01:06:24 kwin_wayland_wrapper[1652]: invalid object (256), type (wl_buffer), message set_region(?o)
Nov 04 01:06:24 kwin_wayland_wrapper[1652]: error in client communication (pid 1795)
Nov 04 01:06:24 plasmashell[1795]: The Wayland connection experienced a fatal error: Invalid argument
Nov 04 01:06:24 plasmashell[1795]: wl_display@1: error 1: invalid arguments for org_kde_kwin_contrast@99.set_region
Nov 04 01:06:24 systemd[1589]: plasma-plasmashell.service: Main process exited, code=exited, status=1/FAILURE
Nov 04 01:06:24 systemd[1589]: plasma-plasmashell.service: Failed with result 'exit-code'.
Nov 04 01:06:24 systemd[1589]: plasma-plasmashell.service: Consumed 36.328s CPU time.
Nov 04 01:06:24 systemd[1589]: plasma-plasmashell.service: Scheduled restart job, restart counter is at 1.
Nov 04 01:06:24 systemd[1589]: Stopped plasma-plasmashell.service - KDE Plasma Workspace.
Nov 04 01:06:24 systemd[1589]: plasma-plasmashell.service: Consumed 36.328s CPU time.

I noticed that lines like plasmashell[3304]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x563433e770b0) were frequently shown at the time of the crash. The tooltips for the icons in the task manager didn't show the window preview when the program was running at least some of the time. The following was when I just moved the cursor over the Firefox icon in the task manager and the tooltip was shown.

Nov 04 01:19:53 plasmashell[3304]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x563433e770b0)
Nov 04 01:19:53 plasmashell[3304]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x563433e770b0)
Nov 04 01:19:53 plasmashell[3304]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x563433e770b0)
Nov 04 01:19:53 plasmashell[3304]: kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x563433e770b0)
Nov 04 01:19:53 kwin_wayland_wrapper[1652]: error in client communication (pid 3304)
Nov 04 01:19:53 plasmashell[3304]: wl_display@1: error 1: invalid method 1, object wl_buffer@226
Nov 04 01:19:53 plasmashell[3304]: The Wayland connection experienced a fatal error: Invalid argument
Nov 04 01:19:53 plasmashell[3304]: The Wayland connection experienced a fatal error: Invalid argument
Nov 04 01:19:54 systemd[1589]: plasma-plasmashell.service: Main process exited, code=exited, status=1/FAILURE
Nov 04 01:19:54 systemd[1589]: plasma-plasmashell.service: Failed with result 'exit-code'.
Nov 04 01:19:54 systemd[1589]: plasma-plasmashell.service: Consumed 21.251s CPU time.
Nov 04 01:19:54 systemd[1589]: plasma-plasmashell.service: Scheduled restart job, restart counter is at 2.
Nov 04 01:19:54 systemd[1589]: Stopped plasma-plasmashell.service - KDE Plasma Workspace.
Nov 04 01:19:54 systemd[1589]: plasma-plasmashell.service: Consumed 21.251s CPU time.
Nov 04 01:19:54 systemd[1589]: Starting plasma-plasmashell.service - KDE Plasma Workspace...
Nov 04 01:19:55 systemd[1589]: Started plasma-plasmashell.service - KDE Plasma Workspace.

The crashes weren't shown by coredumpctl or drkonqi. I tried using gdb -p $(pidof plasmashell) then trying to reproduce the crashes, but they didn't happen when I did that. If you have any suggestions of how to get traces for these crashes, please let me know. I don't usually use the Icons-only task manager, so I'm not sure when this problem started.

STEPS TO REPRODUCE
1. Boot Fedora-KDE-Live-x86_64-Rawhide-20221103.n.0.iso https://koji.fedoraproject.org/koji/buildinfo?buildID=2083580
2. Use the Firefox icon in the task manager to start it, or right-click on it and select start, or select Unpin from task manager or use the other icons in the task manager in similar ways until the crash happens.

OBSERVED RESULT
plasmashell crashed sometimes when using task manager icons with the error The Wayland connection experienced a fatal error: Invalid argument

EXPECTED RESULT
plasmashell wouldn't crash when using task manager icons.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Rawhide/38
(available in About System)
KDE Plasma Version: 5.26.2
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.7

ADDITIONAL INFORMATION