[INFO] cloning repository https://github.com/miromotl/iron-gcd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/miromotl/iron-gcd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiromotl%2Firon-gcd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiromotl%2Firon-gcd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f4fe8ec635fd41376e77ebf98ec4817847e980a
[INFO] documenting miromotl/iron-gcd against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiromotl%2Firon-gcd" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/miromotl/iron-gcd 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 git repo https://github.com/miromotl/iron-gcd
[INFO] finished tweaking git repo https://github.com/miromotl/iron-gcd
[INFO] tweaked toml for git repo https://github.com/miromotl/iron-gcd written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/miromotl/iron-gcd 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] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 uuid v0.1.18
[INFO] [stderr]   Downloaded itoa v0.1.1
[INFO] [stderr]   Downloaded uuid v0.2.3
[INFO] [stderr]   Downloaded router v0.1.1
[INFO] [stderr]   Downloaded url v0.5.10
[INFO] [stderr]   Downloaded serde_json v0.7.4
[INFO] [stderr]   Downloaded urlencoded v0.3.0
[INFO] [stderr]   Downloaded url v0.2.38
[INFO] [stderr]   Downloaded iron v0.3.1
[INFO] [stderr]   Downloaded persistent v0.1.0
[INFO] [stderr]   Downloaded bodyparser v0.3.0
[INFO] [stderr]   Downloaded hyper v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 413c1a37adf05fa0115983fc90aec8f73a90c5b87f930f540a43daf755ac448c
[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" "413c1a37adf05fa0115983fc90aec8f73a90c5b87f930f540a43daf755ac448c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "413c1a37adf05fa0115983fc90aec8f73a90c5b87f930f540a43daf755ac448c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "413c1a37adf05fa0115983fc90aec8f73a90c5b87f930f540a43daf755ac448c", kill_on_drop: false }`
[INFO] [stdout] 413c1a37adf05fa0115983fc90aec8f73a90c5b87f930f540a43daf755ac448c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] c241901393ce916dd4b28fc5933713d8bded50adcc9296ef82b63cdf7531b0de
[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" "c241901393ce916dd4b28fc5933713d8bded50adcc9296ef82b63cdf7531b0de", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v0.7.15
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking unicode-bidi v0.2.6
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking url v0.5.10
[INFO] [stderr]     Checking hyper v0.8.1
[INFO] [stderr]     Checking serde_json v0.7.4
[INFO] [stderr]     Checking iron v0.3.1
[INFO] [stderr]     Checking persistent v0.1.0
[INFO] [stderr]     Checking router v0.1.1
[INFO] [stderr]     Checking bodyparser v0.3.0
[INFO] [stderr]     Checking urlencoded v0.3.0
[INFO] [stderr]  Documenting iron-gcd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.00s
[INFO] running `Command { std: "docker" "inspect" "c241901393ce916dd4b28fc5933713d8bded50adcc9296ef82b63cdf7531b0de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c241901393ce916dd4b28fc5933713d8bded50adcc9296ef82b63cdf7531b0de", kill_on_drop: false }`
[INFO] [stdout] c241901393ce916dd4b28fc5933713d8bded50adcc9296ef82b63cdf7531b0de