Error compiling jpackage test JPackageStringBundle.java source:

C:\jpackage_test\jdk.jpackage\helpers\jdk\jpackage\test\JPackageStringBundle.java:42: error: cannot find symbol
            throw rethrowUnchecked(ex);
  symbol: method rethrowUnchecked(ReflectiveOperationException)
  location: class JPackageStringBundle
C:\jpackage_test\jdk.jpackage\helpers\jdk\jpackage\test\JPackageStringBundle.java:53: error: cannot find symbol
            throw Functional.rethrowUnchecked(ex);
  symbol: method rethrowUnchecked(ReflectiveOperationException)
  location: class Functional