Calculate endIndex from last place of match, not last place of last submatch

Makefile

@@ -29,8 +29,8 @@ TEST := -v --run ParseFailure
 TEST := -v --run RegExp 
 TEST := -v --run stringToFloat 
 TEST := -v --run TryFinally 
-TEST := -v --run RegExp_exec
 TEST := .
+TEST := -v --run RegExp_exec
 
 test: test-i
 	go test $(TEST)

type_regexp.go

@@ -78,7 +78,7 @@ func execRegExp(this *_object, target string) (match bool, result []int) {
 		return // !match
 	}
 	match = true
-	endIndex := int(lastIndex) + result[len(result)-1]
+	endIndex := int(lastIndex) + result[1]
 	if global {
 		this.set("lastIndex", toValue(endIndex), true)
 	}