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-rw-r--r--tactics/class_tactics.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/tactics/class_tactics.ml b/tactics/class_tactics.ml
index 5fbf59b81..30063ce37 100644
--- a/tactics/class_tactics.ml
+++ b/tactics/class_tactics.ml
@@ -527,10 +527,10 @@ let top_sort evm undefs =
let tosee = ref undefs in
let rec visit ev evi =
let evs = Evarutil.undefined_evars_of_evar_info evm evi in
+ tosee := Evar.Map.remove ev !tosee;
Evar.Set.iter (fun ev ->
if Evar.Map.mem ev !tosee then
visit ev (Evar.Map.find ev !tosee)) evs;
- tosee := Evar.Map.remove ev !tosee;
l' := ev :: !l';
in
while not (Evar.Map.is_empty !tosee) do