Since the introduction of saturation, an assert false is now possible

[helm.git] / helm / software / components / ng_refiner / nCicUnification.ml

diff --git a/helm/software/components/ng_refiner/nCicUnification.ml b/helm/software/components/ng_refiner/nCicUnification.ml
index b7141398465eb08afe6d453f690782dfd64dc1ad..fc6eea759313223b30c57a7b6215470ea12c24d5 100644 (file)
--- a/helm/software/components/ng_refiner/nCicUnification.ml
+++ b/helm/software/components/ng_refiner/nCicUnification.ml
@@ -359,7 +359,9 @@ and unify rdb test_eq_only metasenv subst context t1 t2 =
                     (C.Meta (i,l)) lambda_Mj,
                    i
               | NCic.Meta (i,_) -> (metasenv, subst), i
-              | _ -> prerr_endline ("XXX: " ^ NCicPp.ppterm ~metasenv ~subst ~context (NCicReduction.whd ~subst context t1)); assert false
+              | _ ->
+                 raise (UnificationFailure (lazy "Locked term vs non
+                  flexible term; probably not saturated enough yet!"))
              in
               let t1 = NCicReduction.whd ~subst context t1 in
               let j, lj =