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Can't import module types containing GADTs #92

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CPCTC opened this issue Jul 5, 2023 · 0 comments

CPCTC commented Jul 5, 2023

Code:

(* foo.ml *)
module type T = sig
    type _ t = None: unit t
end

(* bar.ml *)
module type T = [%import: (module Foo.T)]

Result:

File "bar.ml", line 1, characters 34-39:
1 | module type T = [%import: (module Foo.T)]
                                      ^^^^^
Error: The type variable name '_ is not allowed in programs

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