bug was due to an unofficial channel. case closed.
- bug#58559: Rust 1.58.1 fails to build Brendan Tildesley
- bug#58559: Rust 1.58.1 fails to build Ludovic Courtès
- bug#58559: Rust 1.58.1 fails to build Brendan Tildesley
- bug#58559: Rust 1.58.1 fails to build Ludovic Courtès
- bug#58559: Rust 1.58.1 fails to build Brendan Tildesley