Don't compile functions in a context the caller doesn't have access to

test/mjsunit/cross-realm-global-prototype.js

Index: test/mjsunit/cross-realm-global-prototype.js
diff --git a/test/mjsunit/cross-realm-global-prototype.js b/test/mjsunit/cross-realm-global-prototype.js
index 46e5a3a37fbc76472c072a3baeb8b51cc272e39e..1b050dc6a659f9771acceef48071a2b2a12cd9f5 100644
--- a/test/mjsunit/cross-realm-global-prototype.js
+++ b/test/mjsunit/cross-realm-global-prototype.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --restricted-realms
 // Make sure we don't accidentally leak information about other objects.
 
 var realm = Realm.create();