smalltree 0.0.1

# rustc version
rustc 1.40.0-nightly (3fc30d884 2019-11-10)# docs.rs version
docsrs 0.6.0 (ba87ff2 2019-11-11)# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/smalltree-0.0.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/smalltree-0.0.1/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 -20191110-1.40.0-nightly-3fc30d884 --static-root-path / --disable-per-crate-search --extern-html-root-url smallgraph=https://docs.rs/smallgraph/0.0.7 --extern-html-root-url smallvec=https://docs.rs/smallvec/1.0.0" "-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" "--target" "x86_64-unknown-linux-gnu"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6e2906a18308457e39397a83dd436896151b2560e10722b617ffd4c516008194
[INFO] running `"docker" "start" "-a" "6e2906a18308457e39397a83dd436896151b2560e10722b617ffd4c516008194"`
[INFO] [stderr]     Checking smallvec v1.0.0
[INFO] [stderr]     Checking smallgraph v0.0.7
[INFO] [stderr]  Documenting smalltree v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "6e2906a18308457e39397a83dd436896151b2560e10722b617ffd4c516008194"`
[INFO] running `"docker" "rm" "-f" "6e2906a18308457e39397a83dd436896151b2560e10722b617ffd4c516008194"`
[INFO] [stdout] 6e2906a18308457e39397a83dd436896151b2560e10722b617ffd4c516008194