diff options
Diffstat (limited to 'pretyping')
| -rw-r--r-- | pretyping/unification.ml | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/pretyping/unification.ml b/pretyping/unification.ml index 00831b5962..a9eb43e573 100644 --- a/pretyping/unification.ml +++ b/pretyping/unification.ml @@ -839,8 +839,9 @@ let rec unify_0_with_initial_metas (sigma,ms,es as subst : subst0) conv_at_top e unify_app_pattern true curenvnb pb opt substn cM f1 l1 cN f2 l2 | _ -> raise ex) - | Case (_,p1,c1,cl1), Case (_,p2,c2,cl2) -> - (try + | Case (ci1,p1,c1,cl1), Case (ci2,p2,c2,cl2) -> + (try + if not (eq_ind ci1.ci_ind ci2.ci_ind) then error_cannot_unify curenv sigma (cM,cN); let opt' = {opt with at_top = true; with_types = false} in Array.fold_left2 (unirec_rec curenvnb CONV {opt with at_top = true}) (unirec_rec curenvnb CONV opt' |