; Fieldtest — canonical-type-names, axis 2 (variant b): BadCrossModuleTypeRef
; — known module, unknown type. Author qualifies as `std_maybe.Widget`
; where `std_maybe` IS a workspace module but does not declare a
; `Widget` type. Per ct.1's load-time validator, this should be
; rejected with `BadCrossModuleTypeRef`. prep.1 (kernel-extension-
; mechanics): the rejection path is unchanged structurally; only the
; message wording is narrowed (suggests "use bare from imported
; module instead").

(module ct_3b_bad_qualified_known_module

  (import std_maybe)

  (fn passthrough
    (doc "Identity at std_maybe.Widget — `std_maybe` is real, but `Widget` is not in it.")
    (type
      (fn-type
        (params (own (con std_maybe.Widget)))
        (ret (own (con std_maybe.Widget)))))
    (params w)
    (body w))

  (fn main
    (type (fn-type (params) (ret (own (con Unit))) (effects IO)))
    (params)
    (body (do io/print_str "unreachable"))))