inline_trivial: terms containing epsilons are non-trivial

src/transform/inlining.ml

@@ -104,6 +104,7 @@ let trivial tl =
   let add vs t = match t.t_node with
     | Tvar v when Mvs.mem v vs -> raise Util.FoldSkip
     | Tvar v -> Svs.add v vs
+    | Teps _ -> raise Util.FoldSkip
     | _ when t_closed t -> vs
     | _ -> raise Util.FoldSkip
   in