Check if mouse_face_overlay was deleted (Bug#35273)

* src/xdisp.c (note_mouse_highlight): Check if the mouse_face_overlay
actually points to a buffer, before calling
mouse_face_overlay_overlaps on it.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 0c3754a338f..aa6e1bd2df8 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -31526,7 +31526,9 @@ note_mouse_highlight (struct frame *f, int x, int y)
              is currently hidden to avoid Bug#30519.  */
           || (!hlinfo->mouse_face_hidden
               && OVERLAYP (hlinfo->mouse_face_overlay)
-              && mouse_face_overlay_overlaps (hlinfo->mouse_face_overlay)))
+              /* It's possible the overlay was deleted (Bug#35273).  */
+              && XMARKER (OVERLAY_START (hlinfo->mouse_face_overlay))->buffer
+              && mouse_face_overlay_overlaps (hlinfo->mouse_face_overlay)))
         {
           /* Find the highest priority overlay with a mouse-face.  */
           Lisp_Object overlay = Qnil;