1 - compiler.warn.incubating.modules: jdk.incubator.mvt
   2 - compiler.err.warnings.and.werror
   3 CheckEquals.java:10:19: compiler.warn.value.does.not.support: ==
   4 CheckEquals.java:10:31: compiler.warn.value.does.not.support: !=
   5 1 error
   6 3 warnings