There is a little bug in Location.isModuleOrientedLocation:

        default boolean isModuleOrientedLocation() {
            return getName().matches("\\bMODULE\\b");
        }

The code around suggests we are supposed to have locations with CAPITALIZED_UNDERSCORE_NAMES. But the regexp: a) does not match anything beyond simple "MODULE" string, because it regexp is un-anchored; b) "\b" does not match "_" to begin with!

jshell> "MODULE".matches("\\bMODULE\\b")
$1 ==> true

jshell> "MODULE_TEST".matches("\\bMODULE\\b")
$2 ==> false

jshell> "MODULE TEST".matches("\\bMODULE\\b")
$3 ==> false

This is less of the problem for `StandardLocation` that would directly implement `isModuleOrientedLocation`. The fix might have external compatibility impact, so it remains to be seen what should be done here.

If we are expanding the check, we need JDK-8351556 to land first to avoid regressions.