concurrent-queue 1.2.1

# rustc version
rustc 1.47.0-nightly (6c8927b0c 2020-07-26)# docs.rs version
docsrs 0.6.0 (482d566 2020-08-03)# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/concurrent-queue-1.2.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/concurrent-queue-1.2.1/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" "MAP_USER_ID=1001" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=-Z unstable-options --resource-suffix -20200726-1.47.0-nightly-6c8927b0c --static-root-path / --cap-lints warn --extern-html-root-url fastrand=https://docs.rs/fastrand/1.3.3 --extern-html-root-url easy_parallel=https://docs.rs/easy-parallel/3.1.0 --extern-html-root-url cache_padded=https://docs.rs/cache-padded/1.1.1" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps" "-j2", kill_on_drop: false }`
[INFO] [stdout] 390a440f635f70394f758f980a02cbdac459a8c533906cc43a9ce5f7bffea9fe
[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" "390a440f635f70394f758f980a02cbdac459a8c533906cc43a9ce5f7bffea9fe", kill_on_drop: false }`
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]  Documenting concurrent-queue v1.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "390a440f635f70394f758f980a02cbdac459a8c533906cc43a9ce5f7bffea9fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "390a440f635f70394f758f980a02cbdac459a8c533906cc43a9ce5f7bffea9fe", kill_on_drop: false }`
[INFO] [stdout] 390a440f635f70394f758f980a02cbdac459a8c533906cc43a9ce5f7bffea9fe