Can not compile

[Strongleong]

When I run cargo build I get this error:

error[E0554]: `#![feature]` may not be used on the stable release channel
 --> crates/vim9-lexer/src/lib.rs:1:1
  |
1 | #![feature(let_chains)]
  | ^^^^^^^^^^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0554`.
error: could not compile `vim9-lexer` due to previous error
warning: build failed, waiting for other jobs to finish...

[Strongleong]

Found solution. Feature let_chains is available in rust nightly. But I am not closing this issue because I think code should compile with stable rust or need in nightly rust must be specified in readme

[tjdevries]

Thanks! I also moved the version to 1.72.0 for the toolchain, so that should all work now without nightly