error[E0308]: `#[panic_handler]` function has wrong type
  --> $DIR/panic-handler-bad-signature-1.rs:9:16
   |
LL | fn panic(info: PanicInfo) -> () {}
   |                ^^^^^^^^^ expected `&PanicInfo<'_>`, found `PanicInfo<'_>`
   |
   = note: expected signature `for<'a, 'b> fn(&'a PanicInfo<'b>) -> !`
              found signature `for<'a> fn(PanicInfo<'a>)`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0308`.