Bug#1043056: gnome-shell: crashes with SIGSEGV in on_after_paint() -> discard_non_cursor_feedbacks()

[Simon McVittie]

Control: retitle -1 gnome-shell: crashes with SIGSEGV in on_after_paint() -> discard_non_cursor_feedbacks()

On Sat, 05 Aug 2023 at 13:50:42 +0200, Jörg Sommer wrote:
> my gnome-shell crashed and I've a coredump of it.

Is there any action you can take that makes this crash more likely
to happen, or is it apparently random?

The interesting stack frames seem to be:

> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  META_IS_WAYLAND_CURSOR_SURFACE (ptr=0x16000000160) at ../src/wayland/meta-wayland-cursor-surface.h:34
...
> #1  discard_non_cursor_feedbacks (feedbacks=0x556d8d544d90) at ../src/wayland/meta-wayland-presentation-time.c:123
...
> #2  on_after_paint (stage=<optimized out>, stage_view=0x556d893c57c0 [MetaRendererView], compositor=0x556d898d3a80 [MetaWaylandCompositor]) at ../src/wayland/meta-wayland-presentation-time.c:151
...
> #6  0x00007fb10a7241bf in <emit signal after-paint on instance 0x556d895fcb00 [MetaStage]> (instance=instance at entry=0x556d895fcb00, signal_id=<optimized out>, detail=detail at entry=0) at ../../../gobject/gsignal.c:3622
...
> #7  0x00007fb109624752 in clutter_stage_emit_after_paint (stage=stage at entry=0x556d895fcb00 [MetaStage], view=view at entry=0x556d893c57c0 [MetaRendererView]) at ../clutter/clutter/clutter-stage.c:488
...
> #8  0x00007fb109629cec in handle_frame_clock_frame (frame_clock=0x556d893c5c90 [ClutterFrameClock], frame_count=<optimized out>, user_data=0x556d893c57c0) at ../clutter/clutter/clutter-stage-view.c:1259

    smcv
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