Correctly initialize regexp global cache.

src/jsregexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 688 matching lines @@
   SetLastCaptureCount(array, capture_register_count);
   SetLastSubject(array, *subject);
   SetLastInput(array, *subject);
   return last_match_info;
 }
 
 
 RegExpImpl::GlobalCache::GlobalCache(Handle<JSRegExp> regexp,
                                      Handle<String> subject,
                                      bool is_global,
-                                     Isolate* isolate) {
+                                     Isolate* isolate)
+  : register_array_(NULL),
+    register_array_size_(0),
+    regexp_(regexp),
+    subject_(subject) {
 #ifdef V8_INTERPRETED_REGEXP
   bool interpreted = true;
 #else
   bool interpreted = false;
 #endif  // V8_INTERPRETED_REGEXP
 
-  regexp_ = regexp;
-  subject_ = subject;
-
   if (regexp_->TypeTag() == JSRegExp::ATOM) {
     static const int kAtomRegistersPerMatch = 2;
     registers_per_match_ = kAtomRegistersPerMatch;
     // There is no distinction between interpreted and native for atom regexps.
     interpreted = false;
   } else {
     registers_per_match_ = RegExpImpl::IrregexpPrepare(regexp_, subject_);
     if (registers_per_match_ < 0) {
       num_matches_ = -1;  // Signal exception.
       return;
@@ skipping 5429 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal