rgw/rgw_user: add [[maybe_unused]] for silencing -Wunused-variable warning

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/rgw/rgw_user.cc b/src/rgw/rgw_user.cc
index 3308828ba9902dba2eb377d4a7b49d4197b9b9e4..e8ad5f3e626563c46e8b466a979d6a0508a04a3b 100644 (file)
--- a/src/rgw/rgw_user.cc
+++ b/src/rgw/rgw_user.cc
@@ -1587,7 +1587,7 @@ static void rename_swift_keys(const rgw_user& user,
   user.to_str(user_id);
 
   auto modify_keys = std::move(keys);
-  for (auto& [k, key] : modify_keys) {
+  for ([[maybe_unused]] auto& [k, key] : modify_keys) {
     std::string id = user_id + ":" + key.subuser;
     key.id = id;
     keys[id] = std::move(key);