nix 0.21.1

# rustc version
rustc 1.56.0-nightly (5a19ffe1c 2021-08-13)
# docs.rs version
docsrs 0.6.0 (843531f 2021-06-26)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/nix-0.21.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/nix-0.21.1/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "2" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bf3311aec13679c042c55305eed4f6f98359c47a37eb765a3317ad487259f4e0" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/x86_64-unknown-linux-gnu\"" "-j2" "--" "-Z" "unstable-options" "--emit=invocation-specific" "--resource-suffix" "-20210813-1.56.0-nightly-5a19ffe1c" "--static-root-path" "/" "--cap-lints" "warn" "--disable-per-crate-search", kill_on_drop: false }`
[INFO] [stdout] 15c0c8c5583e1bf8cacefa590a6cdae0c62c365ea8b15c8bee93e8580d43d0c9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "15c0c8c5583e1bf8cacefa590a6cdae0c62c365ea8b15c8bee93e8580d43d0c9", kill_on_drop: false }`
[INFO] [stderr]  Documenting nix v0.21.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unresolved link to `from_mut_slice`
[INFO] [stderr]    --> src/sys/aio.rs:382:16
[INFO] [stderr]     |
[INFO] [stderr] 382 |     /// Like [`from_mut_slice`], but works on constant slices rather than
[INFO] [stderr]     |                ^^^^^^^^^^^^^^ no item named `from_mut_slice` in scope
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stderr]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stderr] 
[INFO] [stderr] warning: unresolved link to `LioCb::emplace_slice`
[INFO] [stderr]     --> src/sys/aio.rs:1105:27
[INFO] [stderr]      |
[INFO] [stderr] 1105 |     /// operations with [`LioCb::emplace_slice`] or
[INFO] [stderr]      |                           ^^^^^^^^^^^^^^^^^^^^ the struct `LioCb` has no field or associated item named `emplace_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: unresolved link to `LioCb::emplace_mut_slice`
[INFO] [stderr]     --> src/sys/aio.rs:1106:11
[INFO] [stderr]      |
[INFO] [stderr] 1106 |     /// [`LioCb::emplace_mut_slice`].
[INFO] [stderr]      |           ^^^^^^^^^^^^^^^^^^^^^^^^ the struct `LioCb` has no field or associated item named `emplace_mut_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: `nix` (lib doc) generated 3 warnings
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `Command { std: "docker" "inspect" "15c0c8c5583e1bf8cacefa590a6cdae0c62c365ea8b15c8bee93e8580d43d0c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15c0c8c5583e1bf8cacefa590a6cdae0c62c365ea8b15c8bee93e8580d43d0c9", kill_on_drop: false }`
[INFO] [stdout] 15c0c8c5583e1bf8cacefa590a6cdae0c62c365ea8b15c8bee93e8580d43d0c9