Nightly `usize` docs show everything as “Available on 64-bit only”

[narpfel]

Location (URL)

https://doc.rust-lang.org/nightly/std/primitive.usize.html#impl-usize

Summary

Everything in the first impl usize section on the (nightly) usize docs page is listed as “Available on 64-bit only”. This does not happen on the beta and stable versions of that page, so it seems like a recent change.

I noticed this while reading the docs for checked_signed_diff. I didn’t know that method before, so the incorrect note confused me.

I tried to search for https://github.com/rust-lang/rust/issues?q=Available%20on%2064-bit%20only%20usize, but I don’t trust the GitHub issue search enough to be confident that this is not a duplicate, so sorry in advance!

[fmease]

Need to check if this due to a stdlib change or a rustdoc change.

[madsmtm]

Interestingly, the docs in core don't have this bug.

Regressed between 2025-11-09 and 2025-11-10, manually bisected to #148660.