Latest `rustc-nightly` compiler fails to compile

[MonsterDruide1]

Specifically, the x86_64-crate needs to be updated.

Recently, the following change was introduced into the nightly compiler:
rust-lang/rust#155114

As a follow-up, the x86_64 crate was updated to add implementations for these new required functions:
rust-osdev/x86_64#595

This PR has been merged and released as part of the 0.15.5 fixes:
https://github.com/rust-osdev/x86_64/blob/master/Changelog.md#0155--2026-07-11

However, this project makes use of the 0.15.2-version, thus compiler errors occur when running with a more recent version of rustc-nightly.

The following places would need to be updated to 0.15.5:
https://github.com/search?q=repo%3Arust-osdev%2Fbootloader%20%22x86_64%20%3D%20%22&type=code

As a temporary workaround, projects making use of this crate can pin to a specific version of the nightly compiler within their rust-toolchain.toml:
channel = "nightly-2026-07-01" still works.

[Freax13]

Can you try running cargo update -p x86_64?

[phil-opp]

Cargo considers 0.15.2 and 0.15.5 as compatible, so it automatically chooses 0.15.5 on cargo update. This cargo update was done in eb79478. The updated lockfile is part of release 0.11.16 created in #570 .

Which bootloader version are you using? Have you tried a cargo update?

[MonsterDruide1]

Oh, cargo update did the trick. Sorry for wasting your time, I'm not that versed on the cargo ecosystem yet, I didn't know that a pinned version might still be upgraded if considered compatible. I'll definitely read up on that, thanks for the suggestion and saving me more time on debugging at the wrong place!

[phil-opp]

Great to hear!

I didn't know that a pinned version might still be upgraded if considered compatible.

See https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#default-requirements . The version specification "0.15.2" is not a pinned version. Only "=0.15.2" is.