using the provided code, sometimes I'm getting "arg0" instead of the right name in the output after a few runs.
I'm attaching another example but with custom paranamer.
Running with maven I'm not getting the same result:
$ java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)