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-rw-r--r--interp/constrextern.ml23
1 files changed, 13 insertions, 10 deletions
diff --git a/interp/constrextern.ml b/interp/constrextern.ml
index dd8a48b85e..0ba056a878 100644
--- a/interp/constrextern.ml
+++ b/interp/constrextern.ml
@@ -307,16 +307,19 @@ let rec extern_cases_pattern_in_scope (scopes:local_scopes) vars pat =
if !Flags.raw_print then raise Exit;
let projs = Recordops.lookup_projections (fst cstrsp) in
let rec ip projs args acc =
- match projs with
- | [] -> acc
- | None :: q -> ip q args acc
- | Some c :: q ->
- match args with
- | [] -> raise No_match
- | CPatAtom(_, None) :: tail -> ip q tail acc
- (* we don't want to have 'x = _' in our patterns *)
- | head :: tail -> ip q tail
- ((extern_reference loc Id.Set.empty (ConstRef c), head) :: acc)
+ match projs, args with
+ | [], [] -> acc
+ | proj :: q, pat :: tail ->
+ let acc =
+ match proj, pat with
+ | _, CPatAtom(_, None) ->
+ (* we don't want to have 'x := _' in our patterns *)
+ acc
+ | Some c, _ ->
+ ((extern_reference loc Id.Set.empty (ConstRef c), pat) :: acc)
+ | _ -> raise No_match in
+ ip q tail acc
+ | _ -> assert false
in
CPatRecord(loc, List.rev (ip projs args []))
with