error: "the name `black_box` is defined multiple times" when feature `core_hint_black_box` enabled

[madadam]

Just what the title says : when feature core_hint_black_box is enabled, compilation of this crate fails because it unconditionally defines its own black_box: https://github.com/dalek-cryptography/subtle/blob/main/src/lib.rs#L223

[isislovecruft]

Hi @madadam! Thanks for alerting us to this. I've just released 2.6.1 which should fix the issue.