1 error[E0195]: lifetime parameters or bounds on method `scan` do not match the trait declaration
2 --> $DIR/issue-87803.rs:20:12
4 LL | fn scan<'a>(&mut self, i : Self::Input<'a>) -> Self::Token<'a>;
5 | ---- lifetimes in impl do not match this method in trait
7 LL | fn scan<'a>(&mut self, s : &'a str) -> &'a str {
8 | ^^^^ lifetimes do not match method in trait
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0195`.