error[E0373]: async block may outlive the current function, but it borrows `room_ref`, which is owned by the current function
  --> $DIR/issue-78938-async-block.rs:8:33
   |
LL |       let gameloop_handle = spawn(async {
   |  _________________________________^
LL | |         game_loop(Arc::clone(&room_ref))
   | |                               -------- `room_ref` is borrowed here
LL | |     });
   | |_____^ may outlive borrowed value `room_ref`
   |
   = note: async blocks are not executed immediately and must either take a reference or ownership of outside variables they use
help: to force the async block to take ownership of `room_ref` (and any other referenced variables), use the `move` keyword
   |
LL |     let gameloop_handle = spawn(async move {
   |                                       ++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0373`.