snowflake-rust 0.5.4

'twitter' snowflakes.
Documentation
Build #211685 2020-01-09T11:55:40.035445+00:00
# rustc version
rustc 1.42.0-nightly (caa231d99 2020-01-08)
# docs.rs version
docsrs 0.6.0 (0e182b8 2020-01-08)

# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/snowflake-rust-0.5.4/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/snowflake-rust-0.5.4/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 -20200108-1.42.0-nightly-caa231d99 --static-root-path / --extern-html-root-url chrono=https://docs.rs/chrono/0.4.10" "-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] 27b0f02773be9de6409cb5dcea37ab5a95903112c47aea0e9b6347933add86cf
[INFO] running `"docker" "start" "-a" "27b0f02773be9de6409cb5dcea37ab5a95903112c47aea0e9b6347933add86cf"`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]  Documenting snowflake-rust v0.5.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.22s
[INFO] running `"docker" "inspect" "27b0f02773be9de6409cb5dcea37ab5a95903112c47aea0e9b6347933add86cf"`
[INFO] running `"docker" "rm" "-f" "27b0f02773be9de6409cb5dcea37ab5a95903112c47aea0e9b6347933add86cf"`
[INFO] [stdout] 27b0f02773be9de6409cb5dcea37ab5a95903112c47aea0e9b6347933add86cf