diff options
| -rw-r--r-- | pretyping/evarsolve.ml | 2 | ||||
| -rw-r--r-- | test-suite/bugs/closed/7780.v | 16 |
2 files changed, 17 insertions, 1 deletions
diff --git a/pretyping/evarsolve.ml b/pretyping/evarsolve.ml index aefae1ecc..8afb9b942 100644 --- a/pretyping/evarsolve.ml +++ b/pretyping/evarsolve.ml @@ -929,7 +929,7 @@ let invert_arg_from_subst evd aliases k0 subst_in_env_extended_with_k_binders c_ with Not_found -> match expand_alias_once evd aliases t with | None -> raise Not_found - | Some c -> aux k c in + | Some c -> aux k (lift k c) in try let c = aux 0 c_in_env_extended_with_k_binders in Invertible (UniqueProjection (c,!effects)) diff --git a/test-suite/bugs/closed/7780.v b/test-suite/bugs/closed/7780.v new file mode 100644 index 000000000..2318f4d6e --- /dev/null +++ b/test-suite/bugs/closed/7780.v @@ -0,0 +1,16 @@ +(* A lift was missing in expanding aliases under binders for unification *) + +(* Below, the lift was missing while expanding the reference to + [mkcons] in [?N] which was under binder [arg] *) + +Goal forall T (t : T) (P P0 : T -> Set), option (option (list (P0 t)) -> option (list (P t))). + intros ????. + refine (Some + (fun rls + => let mkcons := ?[M] in + let default arg := ?[N] in + match rls as rls (* 2 *) return option (list (P ?[O])) with + | Some _ => None + | None => None + end)). +Abort. |