lint for `unwrap_or` gives half expanded macro code

[TeXitoi]

fn main() {
    let _: Vec<i32> = None.unwrap_or(vec![]);
}

gives

warning: use of `unwrap_or` followed by a function call
 --> src/main.rs:2:23
  |
2 |     let _: Vec<i32> = None.unwrap_or(vec![]);
  |                       ^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: #[warn(or_fun_call)] on by default
help: try this
  |     let _: Vec<i32> = None.unwrap_or_else(|| < [ _ ] > :: into_vec ( box [ $ ( $ x ) , * ] ));
  = help: for further information visit https://github.com/Manishearth/rust-clippy/wiki#or_fun_call

The suggestion looks like half expanded macro. It does not compile.

[oli-obk]

Yea... we have a few of those. It would be best if we could extract the unexpanded code, but we need to take care if the linted expression is inside a macro expansion (e.g. inside try!(...)).