Internal error: Monomorphisation error

If we wrote the following function:

let f (_:unit) (_:nat option) = None

and we perform a run test we have the following error:

➤ ~/bin/ligo run test lib/data/t.mligo                                           
Internal error: Monomorphisation: E_type_abstraction found in unexpected position

Compiler version: 2022-12-02T18:37:36+00:00 Commit Commit Date: Rolling SHA: b61d0f82 release