Prevent another abort in 'cmcheckmagic'

* src/dispnew.c (update_frame_line): Prevent rare aborts when TTY
frame is resized.  (Bug#71289)

1 files changed, 5 insertions, 0 deletions

diff --git a/src/dispnew.c b/src/dispnew.c
index a3c5cbbcf00..8223b90f4a4 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -5263,6 +5263,11 @@ update_frame_line (struct frame *f, int vpos, bool updating_menu_p)
   bool colored_spaces_p = (FACE_FROM_ID (f, DEFAULT_FACE_ID)->background
                            != FACE_TTY_DEFAULT_BG_COLOR);
 
+  /* This should never happen, but evidently sometimes does if one
+     resizes the frame quickly enough.  Prevent aborts in cmcheckmagic.  */
+  if (vpos >= FRAME_LINES (f))
+    return;
+
   if (colored_spaces_p)
     write_spaces_p = 1;