during cargo install cargo-c error[E0063]: missing field rust_version in initializer of `NewCrate

[onorua]

I'm trying to build cargo-c, but it doesn't work. Cargo version installed doesn't make any difference. I've tried from 1.70 to 1.73.0

I was able to build cargo 0.71.0 without any problems.

I've tried compiling it from github repo and by simply cargo install cargo-c no luck.

root@e18d431a85d4:/# cargo install cargo-c
    Updating crates.io index
  Installing cargo-c v0.9.20+cargo-0.71
    Updating crates.io index
   Compiling cargo v0.71.0
error[E0063]: missing field `rust_version` in initializer of `NewCrate`
   --> /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/cargo-0.71.0/src/cargo/ops/registry.rs:383:14
    |
383 |             &NewCrate {
    |              ^^^^^^^^ missing `rust_version`

For more information about this error, try `rustc --explain E0063`.
error: could not compile `cargo` (lib) due to previous error
error: failed to compile `cargo-c v0.9.20+cargo-0.71`, intermediate artifacts can be found at `/tmp/cargo-installcGzR00`.
To reuse those artifacts with a future compilation, set the environment variable `CARGO_TARGET_DIR` to that path.

[sdroege]

This is a problem in cargo, not cargo-c. Can you report that there? For me it stopped compiling with Rust 1.71, 1.70 was working fine it seems.

[lu-zero]

Looks like some dependency broken semver.

[lu-zero]

specifically crates_io

Compared to 0.36.0, 0.36.1 has rust_version added.

[lu-zero]

Upstream issue: rust-lang/cargo#12354

[lu-zero]

The problem should never appear now.