On 8u45, using the 7u80 pack200 library, they get warnings for every class
that they try to compress.

   [exec] WARNING: Passing class file uncompressed due to unrecognized
attribute: com/timetra/nms/client/generated/fileDefs.class
   [exec] Aug 10, 2015 8:24:35 AM
com.sun.java.util.jar.pack.Utils$Pack200Logger warning
   [exec] WARNING: Passing class file uncompressed due to unrecognized
attribute: com/timetra/nms/client/generated/fileMgrDefs.class
   [exec] Aug 10, 2015 8:24:35 AM
com.sun.java.util.jar.pack.Utils$Pack200Logger warning
   [exec] WARNING: Passing class file uncompressed due to unrecognized
attribute: com/timetra/nms/client/generated/fileMaps.class
   [exec] Aug 10, 2015 8:24:36 AM
com.sun.java.util.jar.pack.Utils$Pack200Logger warning
   [exec] WARNING: Passing class file uncompressed due to unrecognized
attribute: com/timetra/nms/client/generated/fileMaps1.class
   [exec] Aug 10, 2015 8:24:36 AM
com.sun.java.util.jar.pack.Utils$Pack200Logger warning
..........and many more

If they switch to use the 8.0 pack200, they don't get any errors or warning.