burner 0.2.3

# rustc version
rustc 1.45.0-nightly (fe10f1a49 2020-06-02)
# docs.rs version
docsrs 0.6.0 (9bd032f 2020-05-31)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/burner-0.2.3/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/burner-0.2.3/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 -20200602-1.45.0-nightly-fe10f1a49 --static-root-path / --cap-lints warn --extern-html-root-url serde_json=https://docs.rs/serde_json/1.0.53" "-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] 6db59414b089129d1a3430aad5321ebadc8f99f5a2fc766d5b11c521016205d9
[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" "6db59414b089129d1a3430aad5321ebadc8f99f5a2fc766d5b11c521016205d9", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]  Documenting burner v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.80s
[INFO] running `Command { std: "docker" "inspect" "6db59414b089129d1a3430aad5321ebadc8f99f5a2fc766d5b11c521016205d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6db59414b089129d1a3430aad5321ebadc8f99f5a2fc766d5b11c521016205d9", kill_on_drop: false }`
[INFO] [stdout] 6db59414b089129d1a3430aad5321ebadc8f99f5a2fc766d5b11c521016205d9