A MessageObject is a purely internal object to hold information about

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 5667e995bbbe7f1e7f3307738d8439ba425646cf..1a2ca0be402dda925acad4b8165dc24680e6bb54 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -2385,6 +2385,11 @@ TEST(APIThrowMessageOverwrittenToString) {
   Local<ObjectTemplate> templ = ObjectTemplate::New();
   templ->Set(v8_str("fail"), v8::FunctionTemplate::New(Fail));
   LocalContext context(NULL, templ);
+  CompileRun("asdf;");
+  CompileRun("var limit = {};"
+             "limit.valueOf = fail;"
+             "Error.stackTraceLimit = limit;");
+  CompileRun("asdf");
   CompileRun("Array.prototype.pop = fail;");
   CompileRun("Object.prototype.hasOwnProperty = fail;");
   CompileRun("Object.prototype.toString = function f() { return 'Yikes'; }");
@@ -2407,7 +2412,6 @@ TEST(APIThrowMessageOverwrittenToString) {
              "ReferenceError.prototype.constructor.name = 1;"
              "Number.prototype.toString = function() { return 'Whoops'; };"
              "ReferenceError.prototype.toString = Object.prototype.toString;");
-  CompileRun("asdf;");

[Søren Thygesen Gjesse, 2011/02/02 13:08:17]

Why did you remove this?

[Mads Ager (chromium), 2011/02/02 13:30:36]

Good catch! Thanks, that was unintentional!

   v8::V8::RemoveMessageListeners(check_message);
 }