| error: the option `Z` is only accepted on the nightly compiler | |
| help: consider switching to a nightly toolchain: `rustup default nightly` | |
| note: selecting a toolchain with `+toolchain` arguments require a rustup proxy; see <https://rust-lang.github.io/rustup/concepts/index.html> | |
| note: for more information about Rust's stability policy, see <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html#unstable-features> | |
| error: 1 nightly option were parsed | |