[Emacs-diffs] emacs-26 7cb5364: Check if mouse_face_overlay was deleted (Bug#35273)

[Noam Postavsky]

branch: emacs-26
commit 7cb5364ef5334de0fb1bc2e470bea450e4567d24
Author: Noam Postavsky <address@hidden>
Commit: Noam Postavsky <address@hidden>

    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.
---
 src/xdisp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index 0c3754a..aa6e1bd 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;