[INFO] cloning repository https://github.com/BooleanCat/mill
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BooleanCat/mill" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBooleanCat%2Fmill", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBooleanCat%2Fmill'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97564eb562a728bc3072a07a4b0658b66d4d1d04
[INFO] documenting BooleanCat/mill against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBooleanCat%2Fmill" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BooleanCat/mill on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BooleanCat/mill
[INFO] finished tweaking git repo https://github.com/BooleanCat/mill
[INFO] tweaked toml for git repo https://github.com/BooleanCat/mill written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/BooleanCat/mill already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 190f31b83da2e69ee70a2d37337555f9ce6294d3d091de590027e7e1fe8abfa3
[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" "190f31b83da2e69ee70a2d37337555f9ce6294d3d091de590027e7e1fe8abfa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "190f31b83da2e69ee70a2d37337555f9ce6294d3d091de590027e7e1fe8abfa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "190f31b83da2e69ee70a2d37337555f9ce6294d3d091de590027e7e1fe8abfa3", kill_on_drop: false }`
[INFO] [stdout] 190f31b83da2e69ee70a2d37337555f9ce6294d3d091de590027e7e1fe8abfa3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b12e75787cab37367cf3cc840c5997b312b7502c60479e64fe13fe9672502fde
[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" "b12e75787cab37367cf3cc840c5997b312b7502c60479e64fe13fe9672502fde", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.65
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking mill_core v0.1.0 (/opt/rustwide/workdir/mill_core)
[INFO] [stderr]  Documenting mill_core v0.1.0 (/opt/rustwide/workdir/mill_core)
[INFO] [stderr]  Documenting mill v0.1.0 (/opt/rustwide/workdir/mill)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.01s
[INFO] running `Command { std: "docker" "inspect" "b12e75787cab37367cf3cc840c5997b312b7502c60479e64fe13fe9672502fde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b12e75787cab37367cf3cc840c5997b312b7502c60479e64fe13fe9672502fde", kill_on_drop: false }`
[INFO] [stdout] b12e75787cab37367cf3cc840c5997b312b7502c60479e64fe13fe9672502fde