Fix Array.prototype.push and Array.prototype.unshift for read-only length.

src/ic.cc

 // 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.
 
 #include "v8.h"
 
 #include "accessors.h"
 #include "api.h"
 #include "arguments.h"
 #include "codegen.h"
@@ skipping 1776 matching lines @@
           if (!(receiver->map()->DictionaryElementsInPrototypeChainOnly())) {
             KeyedAccessStoreMode store_mode =
                 GetStoreMode(receiver, key, value);
             stub = StoreElementStub(receiver, store_mode);
           }
         }
       }
     }
   }
 
+  if (store_handle.is_null()) {
+    ASSIGN_RETURN_ON_EXCEPTION(
+        isolate(),
+        store_handle,
+        Runtime::SetObjectProperty(
+            isolate(), object, key, value, NONE, strict_mode()),
+        Object);
+  }
+
   if (!is_target_set()) {
     if (*stub == *generic_stub()) {
       TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "set generic");
     }
     ASSERT(!stub.is_null());
     set_target(*stub);
     TRACE_IC("StoreIC", key);
   }
 
-  if (!store_handle.is_null()) return store_handle;
-  Handle<Object> result;
-  ASSIGN_RETURN_ON_EXCEPTION(
-      isolate(),
-      result,
-      Runtime::SetObjectProperty(
-          isolate(), object, key, value,  NONE, strict_mode()),
-      Object);
-  return result;
+  return store_handle;
 }
 
 
 CallIC::State::State(ExtraICState extra_ic_state)
     : argc_(ArgcBits::decode(extra_ic_state)),
       call_type_(CallTypeBits::decode(extra_ic_state)) {
 }
 
 
 ExtraICState CallIC::State::GetExtraICState() const {
@@ skipping 1160 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal