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-rw-r--r--tactics/setoid_replace.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/tactics/setoid_replace.ml b/tactics/setoid_replace.ml
index 7a3e39e94b..3db8be9dcb 100644
--- a/tactics/setoid_replace.ml
+++ b/tactics/setoid_replace.ml
@@ -633,7 +633,7 @@ let apply_to_rels c l =
applistc c (Util.list_map_i (fun i _ -> mkRel (len - i)) 0 l)
let apply_to_relation subst rel =
- if subst = [||] then rel
+ if Array.length subst = 0 then rel
else
let new_quantifiers_no = rel.rel_quantifiers_no - Array.length subst in
assert (new_quantifiers_no >= 0) ;