use of unstable library feature 'renamed_spin_loop'

[HBnetDE]

I have tried to add this crate to an empty project with rust nightly.
When trying to build compilation fails with error:
error[E0658]: use of unstable library feature 'renamed_spin_loop'
It also recommends to add the crate attribute #![feature(renamed_spin_loop)]
However, adding this to my crate does nothing.

I have then tried to clone this crate and build it directly.
This causes the same error.
However compilation is successfull after adding the crate attribute to the top of uart_16550's lib.rs.

Is this an error on my end?

[phil-opp]

What is the output of rustc --version for you?

[HBnetDE]

It was rustc 1.49.0-nightly (ffa2e7ae8 2020-10-24) when I wrote this.
I then updated to rustc 1.54.0-nightly (4e3e6db01 2021-05-18) and it builds now.

Thank you.

[phil-opp]

Great to hear that!