error: unknown start of token: \u{ff06}
  --> $DIR/fullwidth-ampersand.rs:3:10
   |
LL | fn f(_: &＆()) -> &() { todo!() }
   |          ^^
   |
help: Unicode character '＆' (Fullwidth Ampersand) looks like '&' (Ampersand), but it is not
   |
LL | fn f(_: &&()) -> &() { todo!() }
   |          ~

error[E0106]: missing lifetime specifier
  --> $DIR/fullwidth-ampersand.rs:3:18
   |
LL | fn f(_: &＆()) -> &() { todo!() }
   |         -----     ^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but the signature does not say which one of argument 1's 2 lifetimes it is borrowed from
help: consider introducing a named lifetime parameter
   |
LL | fn f<'a>(_: &'a ＆'a ()) -> &'a () { todo!() }
   |     ++++     ++   ++         ++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0106`.