c.f. https://rustsec.org/advisories/RUSTSEC-2023-0042.html The ouroboros crate is affected by soundness issues, which could result in invalid code being generated in future versions of Rust. The upstream project recommends to migrate to the self_cell crate: https://github.com/joshua-maros/ouroboros/issues/88 Reproducible: Always
mercurial has migrated to self_cell and is no longer affected.