error: field `s` does not have lifetime 'b
 --> tests/ui/borrow/wrong_lifetime.rs:5:5
  |
3 |   #[derive(Deserialize)]
  |            ----------- in this derive macro expansion
4 |   struct Test<'a> {
5 | /     #[serde(borrow = "'b")]
6 | |     s: &'a str,
  | |______________^
  |
  = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)