https://repl.it/repls/SilverCarelessWearable

  error: attempt to divide by zero
   --> main.rs:2:16
    |
  2 |   let result = 1 / 0;
    |                ^^^^^
    |
    = note: #[deny(const_err)] on by default

  error: this expression will panic at runtime
   --> main.rs:2:16
    |
  2 |   let result = 1 / 0;
    |                ^^^^^ attempt to divide by zero

  error: aborting due to 2 previous errors

very simple example though, no idea what happens when that value comes via socket or file, guess that would panic! then.