black_box: silence unused_mut warning when building with cfg(miri)
black_box: silence unused_mut warning when building with cfg(miri)

aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust