# HG changeset patch
# User Jim Meyering <jim@meyering.net>
# Date 814026674 0
# Node ID 68b8d9f8bf1a6a4cb4b42ead11673d2c46c0d80a
# Parent  39f6e38131a6bb9340398449dbb9015785e52377
Merge latest change from FSF.

diff --git a/lib/regex.c b/lib/regex.c
--- a/lib/regex.c
+++ b/lib/regex.c
@@ -3265,9 +3265,10 @@
     return -1;
     
   /* Fix up RANGE if it might eventually take us outside
-     the virtual concatenation of STRING1 and STRING2.  */
-  if (endpos < -1)
-    range = -1 - startpos;
+     the virtual concatenation of STRING1 and STRING2.
+     Make sure we won't move STARTPOS below 0 or above TOTAL_SIZE.  */ 
+  if (endpos < 0)
+    range = 0 - startpos;
   else if (endpos > total_size)
     range = total_size - startpos;