RegExp: Fix update of lastIndex on non-global sticky

src/regexp.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var $regexpLastMatchInfoOverride;
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
@@ skipping 125 matching lines @@
   }
   return result;
 endmacro
 
 
 function RegExpExecNoTests(regexp, string, start) {
   // Must be called with RegExp, string and positive integer as arguments.
   var matchInfo = %_RegExpExec(regexp, string, start, RegExpLastMatchInfo);
   if (matchInfo !== null) {
     $regexpLastMatchInfoOverride = null;
+    // ES6 21.2.5.2.2 step 18.
+    if (FLAG_harmony_regexps && regexp.sticky) {
+      regexp.lastIndex = matchInfo[CAPTURE1];
+    }
     RETURN_NEW_RESULT_FROM_MATCH_INFO(matchInfo, string);
   }
   regexp.lastIndex = 0;
   return null;
 }
 
 
 function RegExpExecJS(string) {
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
@@ skipping 293 matching lines @@
 // Exports
 
 utils.Export(function(to) {
   to.RegExpExec = DoRegExpExec;
   to.RegExpExecNoTests = RegExpExecNoTests;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
   to.RegExpTest = RegExpTest;
 });
 
 })