catch wrapped exception

diff --git a/helm/software/components/ng_tactics/nTacStatus.ml b/helm/software/components/ng_tactics/nTacStatus.ml
index 035e65ac7b83089cd086b803045c8b24f165ed51..25beed2594509413ceca3ae2f00e4a9f27900217 100644 (file)
--- a/helm/software/components/ng_tactics/nTacStatus.ml
+++ b/helm/software/components/ng_tactics/nTacStatus.ml
@@ -239,8 +239,8 @@ let select_term
     (* we could lift wanted step-by-step *)
     try true, unify status ctx (None, ctx, t) wanted
     with 
-    | NCicUnification.UnificationFailure _ 
-    | NCicUnification.Uncertain _ -> false, status
+    | Error (_, Some (NCicUnification.UnificationFailure _))
+    | Error (_, Some (NCicUnification.Uncertain _)) -> false, status
   in
   let match_term status ctx (wanted : cic_term) t =
     let rec aux ctx (status,already_found) t =