installation (dependency) issue from cargo test --release

[pdimens]

I created a conda environment with rust and cargo in it and when following the installation instructions I was hit with a dependency error. Is this something you have seen before?

> cargo test --release
warning: unused manifest key: package.edition
    Updating registry `https://github.com/rust-lang/crates.io-index`
error: An unknown error occurred

Caused by:
  Feature `std_rng` depends on `rand_hc` which is not an optional dependency.
Consider adding `optional = true` to the dependency

To learn more, run the command again with --verbose.

[holtjma]

I have not, but this looks like some sort of issue with cargo, the network, or maybe the environment. Maybe try some of the things in this thread like deleting the registry?

[pdimens]

It seems to work with a system-wide rust/cargo install, but not with the directions of the thread, likely because I didn't clear the right registry and couldnt hunt down the alternative. Thanks!