Fix Type::Intersect to allocate large enough union.

src/hydrogen-instructions.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 2614 matching lines @@
   done_with_replay_ = true;
 }
 
 
 static void ReplayEnvironmentNested(const ZoneList<HValue*>* values,
                                     HCapturedObject* other) {
   for (int i = 0; i < values->length(); ++i) {
     HValue* value = values->at(i);
     if (value->IsCapturedObject()) {
       if (HCapturedObject::cast(value)->capture_id() == other->capture_id()) {
+        // TODO(jkummerow): This impertinently circumvents const-ness
+        // of |values|!
         values->at(i) = other;
       } else {
         ReplayEnvironmentNested(HCapturedObject::cast(value)->values(), other);
       }
     }
   }
 }
 
 
 // Replay captured objects by replacing all captured objects with the
@@ skipping 2050 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal