Pin to the same version of rust nightly as delta

src/padfoot/connection/connection.rs

@@ -174,7 +174,7 @@ impl telepathy::Connection for Connection {
     fn get_self_handle(&self) -> Result<u32> {
         println!("Connection<{}>::get_self_handle()", self.id());
 
-        self.get_self_handle()
+        self.self_handle()
     }
 
     fn status(&self) -> Result<u32> {