once_cell 1.3.0

# rustc version
rustc 1.42.0-nightly (31dd4f4ac 2020-01-13)# docs.rs version
docsrs 0.6.0 (0e182b8 2020-01-08)# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/once_cell-1.3.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/once_cell-1.3.0/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 -20200113-1.42.0-nightly-31dd4f4ac --static-root-path / --extern-html-root-url crossbeam_utils=https://docs.rs/crossbeam-utils/0.6.6 --extern-html-root-url regex=https://docs.rs/regex/1.3.3 --extern-html-root-url lazy_static=https://docs.rs/lazy_static/1.4.0" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2fcccd5b5fbd280d3e6b68d501e75f0de20e6692c0fe0d59ea3f59f876e8a246
[INFO] running `"docker" "start" "-a" "2fcccd5b5fbd280d3e6b68d501e75f0de20e6692c0fe0d59ea3f59f876e8a246"`
[INFO] [stderr]  Documenting once_cell v1.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "2fcccd5b5fbd280d3e6b68d501e75f0de20e6692c0fe0d59ea3f59f876e8a246"`
[INFO] running `"docker" "rm" "-f" "2fcccd5b5fbd280d3e6b68d501e75f0de20e6692c0fe0d59ea3f59f876e8a246"`
[INFO] [stdout] 2fcccd5b5fbd280d3e6b68d501e75f0de20e6692c0fe0d59ea3f59f876e8a246