client should clean up

myirc/client.cpp

@@ -198,6 +198,13 @@ auto Client::start(std::shared_ptr<Connection> connection) -> std::shared_ptr<Cl
         }
     });
 
+    connection->sig_disconnect.connect([thread](auto) {
+        thread->sig_registered.disconnect_all_slots();
+        thread->sig_cap_ls.disconnect_all_slots();
+        thread->sig_chat.disconnect_all_slots();
+        thread->sig_snote.disconnect_all_slots();
+    });
+
     return thread;
 }