chromium/third_party/rust/chromium_crates_io/vendor/cxx-1.0.126/tests/ui/lifetime_extern_rust.stderr

error: must be `unsafe fn f` in order to expose explicit lifetimes to C++
 --> tests/ui/lifetime_extern_rust.rs:5:9
  |
5 |         fn f<'a>(&'a self, arg: &str) -> &'a str;
  |         ^^^^^^^^