auto-move-windows extension crashes gnome-shell with SIGABRT in src/core/workspace.c:375:meta_workspace_add_window: assertion failed: (g_list_find (workspace->mru_list, window) == NULL)

Full stack trace, seems retracing failed. Oh well.

Only tested on hirsute, no idea if it happens on groovy or focal too.

Tracking upstream in https://gitlab.gnome.org/GNOME/mutter/-/issues/992

I can't seem to get the crash to occur. Tried Chrome and Chromium with PiP in both Xorg and Wayland and it works.

Also tried with the auto-move-windows extension which the upstream bug suggests is the trigger, but again no crash.

Also tried both hirsute and upstream GNOME.

Any more hints? Can you point to a free URL that triggers the problem?

Ah! You need to configure the auto-move-windows extension specifically for Chrome. Then it occurs.

First fix proposed:
https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/157

Upstream has said they will fix gnome-shell itself to warn instead of crash.

Thanks! I appreciate this quick turnaround time :)

Instead of waiting for a fix to be released you can actually hack it into your /<email address hidden>/extension.js

@@ -72,7 +72,7 @@ class WindowMover {
     }

     _moveWindow(window, workspaceNum) {
- if (window.skip_taskbar)
+ if (window.skip_taskbar || window.is_on_all_workspaces())
             return;

         // ensure we have the required number of workspaces

[https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/157]

There is also a general fix for gnome-shell proposed here:

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1692

Hello! Please update the description to include the necessary SRU information [1]. Thank you!

[1] https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

This bug was fixed in the package mutter - 3.38.3-2ubuntu1

---------------
mutter (3.38.3-2ubuntu1) hirsute; urgency=medium

  * Merge with debian, containing new upstream release (LP: #1915025)
    - Disable CRTCs when system becomes headless (LP: #1905825)
    - Fixed crash during windows unmanagement (LP: #1870822)
    - Do not handle ungrabbed events when unmanaging (LP: #1880405)
    - Downgrade assert to warning when adding window (LP: #1911921)
  * d/p/x11-Add-support-for-fractional-scaling-using-Randr.patch:
    - Refreshed
  * debian/rules: Enable remote desktop for all linux builds (LP: #1730612)

mutter (3.38.3-2) unstable; urgency=medium

  * Team upload
  * d/patches: Update to commit 3.38.3-12-g2d424a739 from gnome-3-38 branch
    - Cope with monitors with metacharacters in their EDID data
    - Don't crash if parsing monitor configuration fails
    - Don't crash if an extension tries to add the same window to a
      workspace more than once, such as auto-move-windows
    - Cope with monitor configuration changes during screencasting
    - Speed up workspace switching when many windows are open
    - Fix Xwayland windows not always appearing in the gnome-shell overview
    - Avoid warning spam and poor performance when unmanaging a window
      (probably Closes: #970295, LP: #1841774)

mutter (3.38.3-1) unstable; urgency=medium

  * Team upload
  * d/watch: Only watch for 3.38.x versions
  * New upstream release

 -- Marco Trevisan (Treviño) <email address hidden> Tue, 09 Feb 2021 04:59:11 +0100

This bug is still missing SRU information.