Get gcc to check that we don't ignore return values of functions that can...

src/parser.cc

 // Copyright 2010 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 4264 matching lines @@
                                   Handle<String> type,
                                   Vector< Handle<Object> > arguments) {
   if (is_pre_parsing_) return NULL;
 
   int argc = arguments.length();
   Handle<JSArray> array = Factory::NewJSArray(argc, TENURED);
   ASSERT(array->IsJSArray() && array->HasFastElements());
   for (int i = 0; i < argc; i++) {
     Handle<Object> element = arguments[i];
     if (!element.is_null()) {
-      array->SetFastElement(i, *element);
+      Object* ok = array->SetFastElement(i, *element);
+      USE(ok);  // Don't get an unused variable warning.
+      // We know this doesn't cause a GC here because we allocated the JSArray
+      // large enough.
+      ASSERT(!ok->IsFailure());
     }
   }
   ZoneList<Expression*>* args = new ZoneList<Expression*>(2);
   args->Add(new Literal(type));
   args->Add(new Literal(array));
   return new Throw(new CallRuntime(constructor, NULL, args),
                    scanner().location().beg_pos);
 }
 
 // ----------------------------------------------------------------------------
@@ skipping 1058 matching lines @@
       parser.ParseLazy(script_source, name,
                        start_position, end_position, is_expression);
   return result;
 }
 
 
 #undef NEW
 
 
 } }  // namespace v8::internal