[External] : Permission::checkGuard always throws SecurityException breaking backward compatibility

[Peter Firmstone]

Previously when a SecurityManager wasn't enabled Permission::checkGuard 
didn't throw a SecurityException.   The new behaviour is to throw a 
SecurityException when SecurityManager is not enabled.  I understand 
that OpenJDK wishes to expedite the removal of these methods from 
existing code, however this method has not been deprecated and the new 
behaviour breaks backward compatibility.  Code that runs on Java 8 or 11 
containing these methods cannot run unmodified on Java 26.

Isn't it preferable to perform a no op similar to 
AccessController.doPrivileged, to allow old code to run unmodified?

--
Regards,
 
Peter