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-rw-r--r--pretyping/recordops.ml3
1 files changed, 1 insertions, 2 deletions
diff --git a/pretyping/recordops.ml b/pretyping/recordops.ml
index ccedf1520d..0f1b9ac970 100644
--- a/pretyping/recordops.ml
+++ b/pretyping/recordops.ml
@@ -332,8 +332,7 @@ let lookup_canonical_conversion (proj,pat) =
let is_open_canonical_projection sigma (c,args) =
try
- let l = Refmap.find (global_of_constr c) !object_table in
- let n = (snd (List.hd l)).o_NPARAMS in
+ let n = find_projection_nparams (global_of_constr c) in
try isEvar_or_Meta (whd_evar sigma (List.nth args n)) with Failure _ -> false
with Not_found -> false