ES6 symbols: prevent reflection and proxy APIs from leaking symbols

src/d8.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 209 matching lines @@
 #endif
           if (!result->IsUndefined()) {
             // If all went well and the result wasn't undefined then print
             // the returned value.
             v8::String::Utf8Value str(result);
             fwrite(*str, sizeof(**str), str.length(), stdout);
             printf("\n");
           }
 #if !defined(V8_SHARED)
         } else {
+          v8::TryCatch try_catch;
           Context::Scope context_scope(utility_context_);
           Handle<Object> global = utility_context_->Global();
           Handle<Value> fun = global->Get(String::New("Stringify"));
           Handle<Value> argv[1] = { result };
           Handle<Value> s = Handle<Function>::Cast(fun)->Call(global, 1, argv);
+          if (try_catch.HasCaught()) return true;
           v8::String::Utf8Value str(s);
           fwrite(*str, sizeof(**str), str.length(), stdout);
           printf("\n");
         }
 #endif
       }
       return true;
     }
   }
 }
@@ skipping 1740 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif