Visual alert flash stuck on gnome-terminal window
I had a gnome-terminal window which was flashing continuously (video: https://benjamin.sipsolutions.net/gnome-terminal-flashing.mp4).
The flashing had a fixed size, i.e. resizing the terminal would not make it change.
Nov 05 14:28:03 ben-x1 gnome-shell[2141]: Object Clutter.Actor (0x559ca80e5570), has been already deallocated — impossible to access it. This might be caused by the object having been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs.
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: == Stack trace for context 0x559ca3136200 ==
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #0 559cac2baab0 i resource:///org/gnome/shell/ui/lookingGlass.js:930 (7f79b6d09040 @ 48)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #1 7ffe1cf73020 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f79b73b0b80 @ 71)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #2 559cac2baa00 i resource:///org/gnome/shell/ui/lookingGlass.js:1117 (7f79b6d099d0 @ 104)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #3 7ffe1cf73f90 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f79b73b0b80 @ 71)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #4 559cac2ba970 i resource:///org/gnome/shell/ui/lookingGlass.js:1071 (7f79b6d098b0 @ 135)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #5 7ffe1cf74f10 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f79b73b0b80 @ 71)
Nov 05 14:28:03 ben-x1 org.gnome.Shell.desktop[2141]: #6 7ffe1cf75b30 b self-hosted:979 (7f79b73edf70 @ 440)
Nov 05 14:28:03 ben-x1 gnome-shell[2141]: clutter_actor_remove_effect: assertion 'CLUTTER_IS_ACTOR (self)' failed
I eventually got rid of it by calling destroy() on the ClutterActor after picking it in looking glass, which resulted in the debug output. Anyway, maybe some odd condition like e.g. switching away from the workspace while the visual alert is happening.