ModularPermissionFactory in its construct method eats a Throwable when a permission instantiation failed, see [1]. This makes difficult to figure out why the permission could not be loaded. The Throwable should be logged.

[1] https://github.com/jboss-modules/jboss-modules/blob/master/src/main/java/org/jboss/modules/security/ModularPermissionFactory.java#L81