1 CheckIdentityHash.java:14:32: compiler.warn.value.does.not.support: identityHashCode
   2 CheckIdentityHash.java:15:32: compiler.warn.value.does.not.support: identityHashCode
   3 CheckIdentityHash.java:16:42: compiler.warn.value.does.not.support: identityHashCode
   4 CheckIdentityHash.java:17:42: compiler.warn.value.does.not.support: identityHashCode
   5 - compiler.err.warnings.and.werror
   6 1 error
   7 4 warnings