--- STEPS-3.6.0/src/steps/util/collections.hpp.debug	2021-02-19 20:08:41.000000000 +0900
+++ STEPS-3.6.0/src/steps/util/collections.hpp	2022-07-05 23:31:46.844588413 +0900
@@ -55,6 +55,7 @@
         hash_ref(H hasher_): hasher(hasher_) {}
         H hasher;
         template <typename V> size_t operator()(std::reference_wrapper<V> v) const { return hasher(v.get()); }
+        template <typename V> size_t operator()(V v) const { return hasher(v); }
     };
 
     struct equal_to_ref {
@@ -62,6 +63,10 @@
         size_t operator()(const std::reference_wrapper<V> &u,const std::reference_wrapper<V> &v) const {
             return u.get()==v.get();
         }
+        template <typename V>
+        size_t operator()(V &u,const std::reference_wrapper<V> &v) const {
+            return u==v.get();
+        }
     };
 
     template <typename Table, typename C1, typename C2, typename H>