New jdk9 v53 class file format version were introduced
ClassReader should support v53 class file version
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/b42e6d7b1b99
ClassReader should support v53 class file version
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/b42e6d7b1b99