Unclear error messages in case superclass not found:
Added Classes:
--------------
...list of classes...

Missed Classes:
---------------
...the same list of classes...

It happens if superclass is absent in -Classpath. E.g. if java.lang.Object is absent all classes will be reported as added and missed simultaneously.

The only way to understand approximately what is happend - switch ON debug mode. You can see a lot of exceptions:
java.lang.ClassNotFoundException: java.lang.Object
But it is not friendly as well.

Expected behavior:
The error message should describe a problem accurately. Something like that:
class blah.blah.Blah: superclass java.lang.Object not found