Bogus Type Expected compiler error with CLIPPER method with no args/return type

[cpyrgas]

Following results to "error XS1031: Type expected", when no VO compatibility compiler options are enabled (including /vo15), using the VO dialect:

// VO dialect
CLASS TestClass
	METHOD TestClipper() CLIPPER
	RETURN NIL
END CLASS

Furthermore, when using the Core dialect, the compiler does not report any errors for using the CLIPPER and NIL keywords:

// Core dialect
CLASS TestClass
	// no errors!
	METHOD TestClipper() AS OBJECT CLIPPER
	RETURN NIL
END CLASS