This fails now with X::Method::NotFound and the error message has some more informations:
$ perl6-m -e '*(42)' No such method 'CALL-ME' for invocant of type 'Whatever' in block <unit> at -e line 1 I added a simple test to S02-types/whatever.t with commit https://github.com/perl6/roast/commit/f90f4e371b . I'm closing this ticket as 'resolved'.