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-rw-r--r--contrib/subtac/subtac_classes.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/contrib/subtac/subtac_classes.ml b/contrib/subtac/subtac_classes.ml
index b2489eac19..e966c3afc7 100644
--- a/contrib/subtac/subtac_classes.ml
+++ b/contrib/subtac/subtac_classes.ml
@@ -166,7 +166,7 @@ let new_instance ?(global=false) ctx (instid, bk, cl) props ?(on_free_vars=Class
try
let ((loc, mid), c) = List.find (fun ((_,id'), c) -> Name id' = id) rest in
let rest' = List.filter (fun ((_,id'), c) -> Name id' <> id) rest in
- Dumpglob.add_glob loc (ConstRef (List.assoc mid k.cl_projs));
+ Option.iter (fun x -> Dumpglob.add_glob loc (ConstRef x)) (List.assoc mid k.cl_projs);
c :: props, rest'
with Not_found -> (CHole (Util.dummy_loc, None) :: props), rest)
([], props) k.cl_props