refactor: add error log when iavl set failed (#13803)

* add error log when iavl set failed

Ref: #12012

* Update CHANGELOG.md

* play safe

store/iavl/store.go

@@ -37,7 +37,8 @@ var (
 
 // Store Implements types.KVStore and CommitKVStore.
 type Store struct {
-	tree Tree
+	tree   Tree
+	logger log.Logger
 }
 
 // LoadStore returns an IAVL Store as a CommitKVStore. Internally, it will load the
@@ -87,7 +88,8 @@ func LoadStoreWithInitialVersion(db dbm.DB, logger log.Logger, key types.StoreKe
 	}
 
 	return &Store{
-		tree: tree,
+		tree:   tree,
+		logger: logger,
 	}, nil
 }
 
@@ -198,7 +200,10 @@ func (st *Store) CacheWrapWithListeners(storeKey types.StoreKey, listeners []typ
 func (st *Store) Set(key, value []byte) {
 	types.AssertValidKey(key)
 	types.AssertValidValue(value)
-	st.tree.Set(key, value)
+	_, err := st.tree.Set(key, value)
+	if err != nil && st.logger != nil {
+		st.logger.Error("iavl set error", "error", err.Error())
+	}
 }
 
 // Implements types.KVStore.