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-rw-r--r--pretyping/evarsolve.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/evarsolve.ml b/pretyping/evarsolve.ml
index 2a819a018..f51a39d9e 100644
--- a/pretyping/evarsolve.ml
+++ b/pretyping/evarsolve.ml
@@ -870,7 +870,7 @@ let closure_of_filter evd evk = function
| Some filter ->
let evi = Evd.find_undefined evd evk in
let vars = collect_vars (Evarutil.nf_evar evd (evar_concl evi)) in
- let test b (id,c,_) = b || Idset.mem id vars || not (Option.is_empty c) in
+ let test b (id,c,_) = b || Idset.mem id vars || match c with None -> false | Some c -> isRel c in
let newfilter = Filter.map_along test filter (evar_context evi) in
if Filter.equal newfilter (evar_filter evi) then None else Some newfilter