[INFO] fetching crate futures-channel 0.3.16...
[INFO] documenting futures-channel-0.3.16 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate futures-channel 0.3.16 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate futures-channel 0.3.16 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-channel 0.3.16
[INFO] finished tweaking crates.io crate futures-channel 0.3.16
[INFO] tweaked toml for crates.io crate futures-channel 0.3.16 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b04a00e6601e4250be71ac8285d3874b7bcd594edf6e7a645800f7c6f21beff1
[INFO] running `Command { std: "docker" "start" "-a" "b04a00e6601e4250be71ac8285d3874b7bcd594edf6e7a645800f7c6f21beff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b04a00e6601e4250be71ac8285d3874b7bcd594edf6e7a645800f7c6f21beff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b04a00e6601e4250be71ac8285d3874b7bcd594edf6e7a645800f7c6f21beff1", kill_on_drop: false }`
[INFO] [stdout] b04a00e6601e4250be71ac8285d3874b7bcd594edf6e7a645800f7c6f21beff1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb128790fe308b03a1026281bb5618829fe08e84df301a9fea97f518f05766b6
[INFO] running `Command { std: "docker" "start" "-a" "cb128790fe308b03a1026281bb5618829fe08e84df301a9fea97f518f05766b6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting futures-channel v0.3.16 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.49s
[INFO] running `Command { std: "docker" "inspect" "cb128790fe308b03a1026281bb5618829fe08e84df301a9fea97f518f05766b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb128790fe308b03a1026281bb5618829fe08e84df301a9fea97f518f05766b6", kill_on_drop: false }`
[INFO] [stdout] cb128790fe308b03a1026281bb5618829fe08e84df301a9fea97f518f05766b6
