[INFO] cloning repository https://github.com/FauxFaux/devils-fingers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FauxFaux/devils-fingers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Fdevils-fingers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFauxFaux%2Fdevils-fingers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 557613e58d14216ddd1e7e0aab3ee2b7543641fb
[INFO] documenting FauxFaux/devils-fingers 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%2FFauxFaux%2Fdevils-fingers" "/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/FauxFaux/devils-fingers 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] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking git repo https://github.com/FauxFaux/devils-fingers
[INFO] finished tweaking git repo https://github.com/FauxFaux/devils-fingers
[INFO] tweaked toml for git repo https://github.com/FauxFaux/devils-fingers written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/FauxFaux/devils-fingers 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 bitstring v0.1.1
[INFO] [stderr]   Downloaded zstd-safe v2.0.5+zstd.1.4.5
[INFO] [stderr]   Downloaded etherparse v0.9.0
[INFO] [stderr]   Downloaded zstd-sys v1.4.17+zstd.1.4.5
[INFO] [stderr]   Downloaded cidr v0.1.1
[INFO] [stderr]   Downloaded zstd v0.5.3+zstd.1.4.5
[INFO] [stderr]   Downloaded septid v0.1.0
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a25c146f21bf1d99f34fcc25426817ad50e12e481ec7f752c6fb79f441b53855
[INFO] running `Command { std: "docker" "start" "-a" "a25c146f21bf1d99f34fcc25426817ad50e12e481ec7f752c6fb79f441b53855", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a25c146f21bf1d99f34fcc25426817ad50e12e481ec7f752c6fb79f441b53855", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a25c146f21bf1d99f34fcc25426817ad50e12e481ec7f752c6fb79f441b53855", kill_on_drop: false }`
[INFO] [stdout] a25c146f21bf1d99f34fcc25426817ad50e12e481ec7f752c6fb79f441b53855
[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] 4f24f66c4b2654ec00b0383a97bf5331e0deb2d662827cc1f23c9400dbd9198e
[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" "4f24f66c4b2654ec00b0383a97bf5331e0deb2d662827cc1f23c9400dbd9198e", kill_on_drop: false }`
[INFO] [stderr]     Checking bitstring v0.1.1
[INFO] [stderr]     Checking insideout v0.2.0
[INFO] [stderr]     Checking etherparse v0.9.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]     Checking nix v0.18.0
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking aes-ctr v0.3.0
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking cidr v0.1.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]     Checking septid v0.1.0
[INFO] [stderr]    Compiling zstd-sys v1.4.17+zstd.1.4.5
[INFO] [stderr]     Checking zstd-safe v2.0.5+zstd.1.4.5
[INFO] [stderr]     Checking zstd v0.5.3+zstd.1.4.5
[INFO] [stderr]  Documenting devils-fingers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "4f24f66c4b2654ec00b0383a97bf5331e0deb2d662827cc1f23c9400dbd9198e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f24f66c4b2654ec00b0383a97bf5331e0deb2d662827cc1f23c9400dbd9198e", kill_on_drop: false }`
[INFO] [stdout] 4f24f66c4b2654ec00b0383a97bf5331e0deb2d662827cc1f23c9400dbd9198e