diff options
| -rw-r--r-- | pretyping/unification.ml | 3 | ||||
| -rw-r--r-- | test-suite/success/evars.v | 16 |
2 files changed, 18 insertions, 1 deletions
diff --git a/pretyping/unification.ml b/pretyping/unification.ml index b45d23098..38cf59bc0 100644 --- a/pretyping/unification.ml +++ b/pretyping/unification.ml @@ -673,7 +673,8 @@ let w_merge env with_types flags (evd,metas,evars) = metas evars' eqns | _ -> - w_merge_rec (solve_simple_evar_eqn env evd ev rhs') + let evd', rhs'' = pose_all_metas_as_evars env evd rhs' in + w_merge_rec (solve_simple_evar_eqn env evd' ev rhs'') metas evars' eqns end | [] -> diff --git a/test-suite/success/evars.v b/test-suite/success/evars.v index 6423ad14e..69f7164c7 100644 --- a/test-suite/success/evars.v +++ b/test-suite/success/evars.v @@ -238,3 +238,19 @@ eapply f_equal with (* should fail because ill-typed *) end) in H || injection H. Abort. + +(* A legitimate simple eapply that was failing in coq <= 8.3. + Cf. in Unification.w_merge the addition of an extra pose_all_metas_as_evars + on 30/9/2010 +*) + +Lemma simple_eapply_was_failing : + (forall f:nat->nat, exists g, f = g) -> True. +Proof. + assert (modusponens : forall P Q, P -> (P->Q) -> Q) by auto. + intros. + eapply modusponens. + simple eapply H. + (* error message with V8.3 : + Impossible to unify "?18" with "fun g : nat -> nat => ?6 = g". *) +Abort. |