From a731c563a1cbb425e143bd0c60905f8aebc4ca1a Mon Sep 17 00:00:00 2001
From: Alan Third <alan@idiocy.org>
Date: Thu, 27 Dec 2018 16:23:32 +0000
Subject: [PATCH] Fix NS fringe bitmap drawing bug (bug#33864)

* src/nsterm.m (ns_draw_fringe_bitmap): Check the rectangle to clear
correctly.
---
 src/nsterm.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nsterm.m b/src/nsterm.m
index 893bb1b4414..98a333d53ad 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -2919,7 +2919,7 @@ ns_draw_fringe_bitmap (struct window *w, struct glyph_row *row,
   /* Work out the rectangle we will need to clear.  Because we're
      compositing rather than blitting, we need to clear the area under
      the image regardless of anything else.  */
-  if (!p->overlay_p)
+  if (p->bx >= 0 && !p->overlay_p)
     {
       clearRect = NSMakeRect (p->bx, p->by, p->nx, p->ny);
       clearRect = NSUnionRect (clearRect, imageRect);
-- 
2.39.5