Type inference breaks when a loop is added between inference points

Even with rustc :

> rustc main.rs

error[E0282]: type annotations needed
  --> main.rs:28:28
   |
28 |             println!("{}", n.node_id);
   |                            ^ cannot infer type

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0282`.

You can test it using the playground link

rxdiscovery:

Here is the playground link.