Capture register clearing on loop iteration

test/cctest/test-regexp.cc

Index: test/cctest/test-regexp.cc
diff --git a/test/cctest/test-regexp.cc b/test/cctest/test-regexp.cc
index 986785ec789749a0ce34d5343d4e34e250483702..4f560f8f9a9d0fbeffe5a66c335b180dcbc9d967 100644
--- a/test/cctest/test-regexp.cc
+++ b/test/cctest/test-regexp.cc
@@ -1548,5 +1548,5 @@ TEST(CharClassDifference) {
 
 TEST(Graph) {
   V8::Initialize(NULL);
-  Execute("(?:a|)*", false, true, true);
+  Execute("(?:(a)+)?", false, true, true);
 }