Revert trunk to bleeding_edge at r12484

src/regexp.js

Index: src/regexp.js
diff --git a/src/regexp.js b/src/regexp.js
index a3675f033248ba59ffb983967e7951476b3b1e67..38090397aa21c037b6f2b047d947c026d7b3cf02 100644
--- a/src/regexp.js
+++ b/src/regexp.js
@@ -140,15 +140,18 @@ function BuildResultFromMatchInfo(lastMatchInfo, s) {
   var j = REGEXP_FIRST_CAPTURE + 2;
   for (var i = 1; i < numResults; i++) {
     start = lastMatchInfo[j++];
-    if (start != -1) {
-      end = lastMatchInfo[j];
+    end = lastMatchInfo[j++];
+    if (end != -1) {
       if (start + 1 == end) {
         result[i] = %_StringCharAt(s, start);
       } else {
         result[i] = %_SubString(s, start, end);
       }
+    } else {
+      // Make sure the element is present. Avoid reading the undefined
+      // property from the global object since this may change.
+      result[i] = void 0;
     }
-    j++;
   }
   return result;
 }