test_may_duplicate.m:033: Error: the `may_duplicate' attribute on the
test_may_duplicate.m:033:   foreign_proc is not compatible with the
test_may_duplicate.m:033:   `:- pragma no_inline' declaration on the predicate.
test_may_duplicate.m:055: Error: the `may_not_duplicate' attribute on the
test_may_duplicate.m:055:   foreign_proc is not compatible with the
test_may_duplicate.m:055:   `:- pragma inline' declaration on the predicate.