[INFO] fetching crate mpd_client 0.3.0...
[INFO] documenting mpd_client-0.3.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate mpd_client 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mpd_client 0.3.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mpd_client 0.3.0
[INFO] finished tweaking crates.io crate mpd_client 0.3.0
[INFO] tweaked toml for crates.io crate mpd_client 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mpd_client 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mpd_protocol v0.7.0
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1c0fcb70de7e613c920b5d4c644c7c8aab288afc9969d63b23f6028d2c22c07
[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" "a1c0fcb70de7e613c920b5d4c644c7c8aab288afc9969d63b23f6028d2c22c07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1c0fcb70de7e613c920b5d4c644c7c8aab288afc9969d63b23f6028d2c22c07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1c0fcb70de7e613c920b5d4c644c7c8aab288afc9969d63b23f6028d2c22c07", kill_on_drop: false }`
[INFO] [stdout] a1c0fcb70de7e613c920b5d4c644c7c8aab288afc9969d63b23f6028d2c22c07
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a5fff057e333c12c9ddb8d89062554a4986090b3337bf16a1b6c8b4ba231545
[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" "4a5fff057e333c12c9ddb8d89062554a4986090b3337bf16a1b6c8b4ba231545", 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] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.14
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking mpd_protocol v0.7.0
[INFO] [stderr]  Documenting mpd_client v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.02s
[INFO] running `Command { std: "docker" "inspect" "4a5fff057e333c12c9ddb8d89062554a4986090b3337bf16a1b6c8b4ba231545", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a5fff057e333c12c9ddb8d89062554a4986090b3337bf16a1b6c8b4ba231545", kill_on_drop: false }`
[INFO] [stdout] 4a5fff057e333c12c9ddb8d89062554a4986090b3337bf16a1b6c8b4ba231545