#![feature] may not be used on the stable release channel

[Dentrax]

Hey,

Thank for the project! You are doing well. :)

On compiling phase via AUR on Arch Linux, I am getting this:

error[E0554]: #![feature] may not be used on the stable release channel
 --> /home/dentrax/.cargo/registry/src/github.com-1ecc6299db9ec823/hunter-1.1.0/src/main.rs:1:1
  |
1 | #![feature(vec_remove_item)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0554]: #![feature] may not be used on the stable release channel
 --> /home/dentrax/.cargo/registry/src/github.com-1ecc6299db9ec823/hunter-1.1.0/src/main.rs:2:1
  |
2 | #![feature(trivial_bounds)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0554]: #![feature] may not be used on the stable release channel
 --> /home/dentrax/.cargo/registry/src/github.com-1ecc6299db9ec823/hunter-1.1.0/src/main.rs:3:1
  |
3 | #![feature(try_trait)]
  | ^^^^^^^^^^^^^^^^^^^^^^

error[E0554]: #![feature] may not be used on the stable release channel
 --> /home/dentrax/.cargo/registry/src/github.com-1ecc6299db9ec823/hunter-1.1.0/src/main.rs:4:1
  |
4 | #![feature(fnbox)]
  | ^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0554`.
error: failed to compile `hunter v1.1.0`, intermediate artifacts can be found at `/tmp/cargo-installTlPHje`

Similar to: #15

But, I am new to Rust; So, I don't exactly understand the Rust specific terms. How could we solve the this bug (with box-of-the-box way)?

cargo: cargo 1.34.0 rustc: rustc 1.34.0

Thanks!

[straussdd]

This happens because hunter uses features of the Rust library which haven't been finalized yet. These features can only be compiled using rustc compilers from the "nightly" release channel. You can get them by using Rustup (https://rustup.rs/) and selecting the nightly channel when asked.

There's already ongoing work to get hunter running on the stable release channel as well (see #15), but this effort probably will have to wait for the completion of the try_trait feature from rust-lang/rust#42327.

[straussdd]

I've re-read the README.md and noticed that it makes no mention of the nightly branch being a requirement. This should definitely be changed to allow for successful compilation without prior knowledge of Rust toolchain internals.

@rabite0: Maybe add rustup + nightly as installation steps in README.md, so this bug won't pop up again?

[rabite0]

I added a note about rustup. Soon there will be binary packages, so installation should become a non-issue.