Skip mouse-face overlap check when mouse-face is hidden (Bug#30519)

* src/xdisp.c (note_mouse_highlight): Skip check whether
mouse-face highlighting overlay overlaps other mouse-face
overlays when mouse-face highlighting is hidden (Bug#30519).

1 files changed, 6 insertions, 4 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index da9c31314ca..b003a2f9ccc 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -31357,10 +31357,12 @@ note_mouse_highlight (struct frame *f, int x, int y)
       /* Check mouse-face highlighting.  */
       if (! same_region
           /* If there exists an overlay with mouse-face overlapping
-             the one we are currently highlighting, we have to
-             check if we enter the overlapping overlay, and then
-             highlight only that.  */
-          || (OVERLAYP (hlinfo->mouse_face_overlay)
+             the one we are currently highlighting, we have to check
+             if we enter the overlapping overlay, and then highlight
+             only that.  Skip the check when mouse-face highlighting
+             is currently hidden to avoid Bug#30519.  */
+          || (!hlinfo->mouse_face_hidden
+              && OVERLAYP (hlinfo->mouse_face_overlay)
               && mouse_face_overlay_overlaps (hlinfo->mouse_face_overlay)))
         {
           /* Find the highest priority overlay with a mouse-face.  */