Fix crash after frame is freed on macOS (bug#30800)

* src/nsterm.m (x_free_frame_resources): Clear represented_frame.
(bug#30800)

diff --git a/src/nsterm.m b/src/nsterm.m
index 3d58cd5ec649dee9f0fdb2e1cef2cca08c0b466c..c8ae31abc09a0ac9473d13c84594b01194f3bc0a 100644 (file)
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -1692,6 +1692,10 @@ x_free_frame_resources (struct frame *f)
     dpyinfo->x_highlight_frame = 0;
   if (f == hlinfo->mouse_face_mouse_frame)
     reset_mouse_highlight (hlinfo);
+  /* Ensure that sendEvent does not attempt to dereference a freed
+     frame. (bug#30800) */
+  if (represented_frame == f)
+    represented_frame = NULL;
 
   if (f->output_data.ns->miniimage != nil)
     [f->output_data.ns->miniimage release];