Bug 613820: Regexp forwards ref in quantified parens test. (r=dmandelin)

js/src/tests/ecma_5/RegExp/jstests.list

@@ -6,5 +6,8 @@ script empty-lookahead.js
 script exec.js
 script exec-lastIndex-ToInteger.js
 script regress-576828.js
+script regress-613820-1.js
+script regress-613820-2.js
+script regress-613820-3.js
 silentfail skip-if(!xulRuntime.shell&&(Android||xulRuntime.OS=="WINNT")) script regress-617935.js
 script instance-property-storage-introspection.js

js/src/tests/ecma_5/RegExp/regress-613820-1.js

@@ -0,0 +1,9 @@
+/* Back reference is actually a forwards reference. */
+var re = /(\2(a)){2}/;
+var str = 'aaa';
+var actual = re.exec(str);
+var expected = makeExpectedMatch(['aa', 'a', 'a'], 0, str);
+checkRegExpMatch(actual, expected);
+
+if (typeof reportCompare === 'function')
+    reportCompare(true, true);

js/src/tests/ecma_5/RegExp/regress-613820-2.js

@@ -0,0 +1,9 @@
+/* Resetting of inner capture groups across quantified capturing parens. */
+var re = /(?:(f)(o)(o)|(b)(a)(r))*/;
+var str = 'foobar';
+var actual = re.exec(str);
+var expected = makeExpectedMatch(['foobar', undefined, undefined, undefined, 'b', 'a', 'r'], 0, str);
+checkRegExpMatch(actual, expected);
+
+if (typeof reportCompare === 'function')
+    reportCompare(true, true);

js/src/tests/ecma_5/RegExp/regress-613820-3.js

@@ -0,0 +1,9 @@
+/* Capture group reset to undefined during second iteration, so backreference doesn't see prior result. */
+var re = /(?:^(a)|\1(a)|(ab)){2}/;
+var str = 'aab';
+var actual = re.exec(str);
+var expected = makeExpectedMatch(['aa', undefined, 'a', undefined], 0, str);
+checkRegExpMatch(actual, expected);
+
+if (typeof reportCompare === 'function')
+    reportCompare(true, true);