kyansel 0.3.1

Cancellable future. Provide a future as argument and the current future will cancel if the provided future resolves first
Documentation
Build #200323 2019-11-22T04:19:16.537412+00:00
# rustc version
rustc 1.41.0-nightly (5c5b8afd8 2019-11-16)
# docs.rs version
docsrs 0.6.0 (d9d7a33 2019-11-14)

# build log
[INFO] running `"docker" "create" "-v" "/home/cratesfyi/workspace/builds/kyansel-0.3.1/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/kyansel-0.3.1/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 -20191116-1.41.0-nightly-5c5b8afd8 --static-root-path / --disable-per-crate-search --extern-html-root-url tokio=https://docs.rs/tokio/0.2.0-alpha.6 --extern-html-root-url tokio=https://docs.rs/tokio/0.1.22 --extern-html-root-url futures=https://docs.rs/futures/0.3.1" "-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-2019-11-17" "doc" "--lib" "--no-deps" "--target" "x86_64-unknown-linux-gnu" "--all-features"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cc55e92e36fcd1bfa10b8fef04a51d1d663ce377bb15013821d9168b7126f691
[INFO] running `"docker" "start" "-a" "cc55e92e36fcd1bfa10b8fef04a51d1d663ce377bb15013821d9168b7126f691"`
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]  Documenting kyansel v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.46s
[INFO] running `"docker" "inspect" "cc55e92e36fcd1bfa10b8fef04a51d1d663ce377bb15013821d9168b7126f691"`
[INFO] running `"docker" "rm" "-f" "cc55e92e36fcd1bfa10b8fef04a51d1d663ce377bb15013821d9168b7126f691"`
[INFO] [stdout] cc55e92e36fcd1bfa10b8fef04a51d1d663ce377bb15013821d9168b7126f691