49bcc70574
Give name if anonymous region appears in impl signature Fixes #98170 We probably should remove the two unwraps in [`report_general_error`](https://doc.rust-lang.org/nightly/nightly-rustc/src/rustc_borrowck/diagnostics/region_errors.rs.html#683-685), but I have no idea what to provide if those regions are missing, so I've kept those in. Let me know if I should try harder to remove those.