When I run `./x.py test` locally, I get errors: ``` ---- [ui] tests/ui-fulldeps/session-diagnostic/invalid-variable.rs stdout ---- error: test compilation failed although it shouldn't! [..] --- stderr ------------------------------- error: unknown unstable option: `ignore-directory-in-diagnostics-source-blocks` ------------------------------------------ ``` (Same for 27 ui-fulldeps tests in total.) I assume this happened after https://github.com/rust-lang/rust/pull/115869. cc @pietroalbini