(x_display_cursor): Abort if X or Y is out of range.

045226c7 · Richard M. Stallman · 47ab3db5 · 045226c7
Commit 045226c7 authored Dec 21, 1997 by Richard M. Stallman
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src/xterm.c src/xterm.c +4 -0

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--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4902,6 +4902,10 @@ x_display_cursor (f, on, x, y)
 {
  BLOCK_INPUT;

+ if ((unsigned) x >= FRAME_WIDTH (f) + FRAME_LEFT_SCROLL_BAR_WIDTH (f)
+      || (unsigned) y >= FRAME_HEIGHT (f))
+    abort ();
+
  if (FRAME_DESIRED_CURSOR (f) == filled_box_cursor)
    x_display_box_cursor (f, on, x, y);
  else if (FRAME_DESIRED_CURSOR (f) == bar_cursor)