The current documentation on docs.rs is missing the x86_64-unknown-linux-gnu platform: https://docs.rs/socket2/0.5.8/socket2/

The documentation build logs can be seen at https://docs.rs/crate/socket2/0.5.8/builds

Key takeaways:

A new documentation build was run on 2025年02月22日. An older build for the same version 0.5.8 was run on 2024年11月27日.

Both builds include 11 platforms. Cargo.toml lists 14 platforms as targets for documentation. The most recent build is missing x86_64-unknown-linux-gnu, the older build has that platform but is missing other platforms.

I don't see any information that docs.rs is limited to 11 platforms. But there is a very old mention that it's limited to 10 platforms: rust-windowing/winit#1028 (comment)