--- agrep/sgrep.c.orig	Mon Apr 26 23:15:06 2004
+++ agrep/sgrep.c	Mon Apr 26 23:15:33 2004
@@ -1539,7 +1539,7 @@
 		hash = TR[*text];
 		hash = (hash << 3) + TR[*(text-1)];
 		shift = SHIFT_2[hash];
-		while(shift) {
+		while(shift && text <= textend) {
 			text = text + shift;
 			hash = (TR[*text] << 3) + TR[*(text-1)];
 			shift = SHIFT_2[hash];