Fix: AstValueFactory must be internalized before ThrowPendingError.

src/ast-value-factory.h

 // Copyright 2014 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 230 matching lines @@
     }
     STRING_CONSTANTS(F)
 #undef F
   }
 
   const AstString* GetOneByteString(Vector<const uint8_t> literal);
   const AstString* GetTwoByteString(Vector<const uint16_t> literal);
   const AstString* GetString(Handle<String> literal);
 
   void Internalize(Isolate* isolate);
+  bool IsInternalized() {
+    return isolate_ != NULL;
+  }
 
 #define F(name, str) \
   const AstString* name##_string() const { return name##_string_; }
   STRING_CONSTANTS(F)
 #undef F
 
   const AstValue* NewString(const AstString* string);
   // A JavaScript symbol (ECMA-262 edition 6).
   const AstValue* NewSymbol(const char* name);
   const AstValue* NewNumber(double number);
@@ skipping 24 matching lines @@
   const AstString* name##_string_;
   STRING_CONSTANTS(F)
 #undef F
 };
 
 } }  // namespace v8::internal
 
 #undef STRING_CONSTANTS
 
 #endif  // V8_AST_VALUE_FACTORY_H_