Merge pull request ceph#59028 from cbodley/wip-67326

rgw/notify: visit() returns copy of owner string

Reviewed-by: Adam Emerson <[email protected]>

Author: cbodley

src/rgw/driver/rados/rgw_notify.cc

@@ -1111,8 +1111,8 @@ int publish_reserve(const DoutPrefixProvider* dpp,
 
       // reload the topic in case it changed since the notification was added
       const std::string& topic_tenant = std::visit(fu2::overload(
-          [] (const rgw_user& u) -> const std::string& { return u.tenant; },
-          [] (const rgw_account_id& a) -> const std::string& { return a; }
+          [] (const rgw_user& u) -> std::string { return u.tenant; },
+          [] (const rgw_account_id& a) -> std::string { return a; }
           ), topic_cfg.owner);
       const RGWPubSub ps(res.store, topic_tenant, site);
       int ret = ps.get_topic(res.dpp, topic_cfg.dest.arn_topic,