The regex used to verify problemlist lines:

        private static final String commalist = "([\\w-]+)(,[\\w-]+)*";
        private static Pattern pattern = Pattern.compile("\\S+\\s+" + commalist + "\\s" + commalist + ".*");

Is missing a plus for the spaces in the middle. More than one whitespace should be okay.

src/share/classes/com/sun/javatest/regtest/tool/ExcludeFileVerifier.java