error[E0261]: use of undeclared lifetime name `'d`
  --> $DIR/issue-109299.rs:6:12
   |
LL | impl Lexer<'d> {
   |     -      ^^ undeclared lifetime
   |     |
   |     help: consider introducing lifetime `'d` here: `<'d>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0261`.