fix bug [ruby-list:42234]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10168 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/regexec.c b/regexec.c
index de14d6d818..90514d403c 100644
--- a/regexec.c
+++ b/regexec.c
@@ -360,7 +360,8 @@ typedef struct _StackType {
 /* stack type check mask */
 #define STK_MASK_POP_USED     0x00ff
 #define IS_TO_VOID_TARGET(stk) \
-     (((stk)->type & STK_MASK_POP_USED) || (stk)->type == STK_NULL_CHECK_START)
+     (((stk)->type & STK_MASK_POP_USED) || \
+       (stk)->type == STK_NULL_CHECK_START || (stk)->type == STK_NULL_CHECK_END)
 
 typedef struct {
   void* stack_p;