Fixes r11788 (partial, thus broken commit).

[helm.git] / matita / components / ng_refiner / nCicRefiner.ml

diff --git a/matita/components/ng_refiner/nCicRefiner.ml b/matita/components/ng_refiner/nCicRefiner.ml
index bb90cf7215ec0ed2bc85d94e6c22de69e65a4075..563fe392858b4f09ca26158bbcdd1c87e1290085 100644 (file)
--- a/matita/components/ng_refiner/nCicRefiner.ml
+++ b/matita/components/ng_refiner/nCicRefiner.ml
@@ -143,11 +143,14 @@ let check_allowed_sort_elimination status localise r orig =
 let mk_fresh_name context name =
 try
  let rex = Str.regexp "[0-9']*$" in
+ let rex2 = Str.regexp "'*$" in
  let basename = Str.global_replace rex "" in
  let suffix name =
   ignore (Str.search_forward rex name 0);
   let n = Str.matched_string name in
-   if n = "" then 0 else int_of_string n in
+  let n = Str.global_replace rex2 "" n in
+   if n = "" then 0 else int_of_string n
+in
  let name' = basename name in
  let name' = if name' = "_" then "H" else name' in
  let last =
@@ -906,12 +909,19 @@ and force_to_sort status metasenv subst context t orig_t localise ty =
       metasenv, subst, t, ty
   with
       Failure _ -> 
+        let msg =
+         (lazy (localise orig_t, 
+           "The type of " ^ status#ppterm ~metasenv ~subst ~context t ^
+           " is not a sort: " ^ status#ppterm ~metasenv ~subst ~context ty)) in
         let ty = NCicReduction.whd status ~subst context ty in
+        let exn =
+         if NCicUnification.could_reduce status ~subst context ty then
+          Uncertain msg
+         else
+          RefineFailure msg
+        in
           try_coercions status ~localise metasenv subst context
-            t orig_t ty `Sort 
-             (Uncertain (lazy (localise orig_t, 
-             "The type of " ^ status#ppterm ~metasenv ~subst ~context t ^
-             " is not a sort: " ^ status#ppterm ~metasenv ~subst ~context ty)))
+            t orig_t ty `Sort exn
 
 and sort_of_prod status localise metasenv subst context orig_s orig_t (name,s)
  t (t1, t2)