Volatile coarrays

The compiler does not seem to be honouring C560 "The VOLATILE attribute shall not be specified for a coarray that is accessed by use (11.2.2) or host (16.5.1.4) association."  This is the clearest example, but I can't get a message no matter what I do.

MODULE Wombat

    INTEGER :: x[*]

END MODULE Wombat

PROGRAM Main

    Use Wombat

    VOLATILE :: x

    x = 0

END PROGRAM Main