matz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@876 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/regex.c b/regex.c
index 156e75bb49..189c28205a 100644
--- a/regex.c
+++ b/regex.c
@@ -3964,7 +3964,7 @@ re_match(bufp, string_arg, size, pos, regs)
 	   because didn't fail.  Also remove the register information
 	   put on by the on_failure_jump.  */
       case finalize_jump:
-	if (stackp[-2] == d) {
+	if (stackp > stackb && stackp[-2] == d) {
 	  p = stackp[-3];
 	  POP_FAILURE_POINT();
 	  continue;
@@ -3981,7 +3981,7 @@ re_match(bufp, string_arg, size, pos, regs)
       case jump:
       nofinalize:
         EXTRACT_NUMBER_AND_INCR(mcnt, p);
-        if (mcnt < 0 && stackp > stackb && stackp[-2] == d) /* avoid infinit loop */
+        if (mcnt < 0 && stackp > stackb && stackp[-2] == d) /* avoid infinite loop */
 	   goto fail;
         p += mcnt;
         continue;
@@ -4072,7 +4072,7 @@ re_match(bufp, string_arg, size, pos, regs)
       case finalize_push:
 	POP_FAILURE_POINT();
 	EXTRACT_NUMBER_AND_INCR(mcnt, p);
-        if (mcnt < 0 && stackp[-2] == d) /* avoid infinit loop */
+        if (mcnt < 0 && stackp > stackb  && stackp[-2] == d) /* avoid infinite loop */
 	   goto fail;
 	PUSH_FAILURE_POINT(p + mcnt, d);
 	stackp[-1] = NON_GREEDY;