[INFO] fetching crate igc 0.2.2...
[INFO] documenting igc-0.2.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate igc 0.2.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate igc 0.2.2 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 igc 0.2.2
[INFO] finished tweaking crates.io crate igc 0.2.2
[INFO] tweaked toml for crates.io crate igc 0.2.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate igc 0.2.2 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v1.3.1
[INFO] [stderr]   Downloaded bit-set v0.5.1
[INFO] [stderr]   Downloaded rand v0.5.6
[INFO] [stderr]   Downloaded cfg-if v0.1.7
[INFO] [stderr]   Downloaded termion v1.5.2
[INFO] [stderr]   Downloaded libc v0.2.53
[INFO] [stderr]   Downloaded itoa v0.4.3
[INFO] [stderr]   Downloaded crossbeam-epoch v0.3.1
[INFO] [stderr]   Downloaded crossbeam-deque v0.2.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.2.2
[INFO] [stderr]   Downloaded proc-macro2 v0.4.29
[INFO] [stderr]   Downloaded rayon v1.0.3
[INFO] [stderr]   Downloaded syn v0.15.33
[INFO] [stderr]   Downloaded rayon-core v1.4.1
[INFO] [stderr]   Downloaded ryu v0.2.7
[INFO] [stderr]   Downloaded serde_derive v1.0.90
[INFO] [stderr]   Downloaded tinytemplate v1.0.1
[INFO] [stderr]   Downloaded bit-vec v0.5.1
[INFO] [stderr]   Downloaded bitflags v1.0.4
[INFO] [stderr]   Downloaded proptest v0.8.7
[INFO] [stderr]   Downloaded serde v1.0.90
[INFO] [stderr]   Downloaded tempfile v3.0.7
[INFO] [stderr]   Downloaded num-traits v0.2.6
[INFO] [stderr]   Downloaded autocfg v0.1.2
[INFO] [stderr]   Downloaded walkdir v2.2.7
[INFO] [stderr]   Downloaded remove_dir_all v0.5.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.6
[INFO] [stderr]   Downloaded rand_jitter v0.1.3
[INFO] [stderr]   Downloaded num_cpus v1.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] fa67cf4cafa53bf34918155df393d1ad0aafebccd919d5d59cbec40b6186a65e
[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" "fa67cf4cafa53bf34918155df393d1ad0aafebccd919d5d59cbec40b6186a65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa67cf4cafa53bf34918155df393d1ad0aafebccd919d5d59cbec40b6186a65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa67cf4cafa53bf34918155df393d1ad0aafebccd919d5d59cbec40b6186a65e", kill_on_drop: false }`
[INFO] [stdout] fa67cf4cafa53bf34918155df393d1ad0aafebccd919d5d59cbec40b6186a65e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 511cb71d0e8e1dbeb0c2ed54f31b37dbe09a09be26f4cbc494c7d6bfabff99cd
[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" "511cb71d0e8e1dbeb0c2ed54f31b37dbe09a09be26f4cbc494c7d6bfabff99cd", kill_on_drop: false }`
[INFO] [stderr]  Documenting igc v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "511cb71d0e8e1dbeb0c2ed54f31b37dbe09a09be26f4cbc494c7d6bfabff99cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "511cb71d0e8e1dbeb0c2ed54f31b37dbe09a09be26f4cbc494c7d6bfabff99cd", kill_on_drop: false }`
[INFO] [stdout] 511cb71d0e8e1dbeb0c2ed54f31b37dbe09a09be26f4cbc494c7d6bfabff99cd