[INFO] cloning repository https://github.com/jakobbeckmann/chans_algorithm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakobbeckmann/chans_algorithm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobbeckmann%2Fchans_algorithm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobbeckmann%2Fchans_algorithm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fef9a303f1fd0c2b000af908aff6f956aa224784
[INFO] documenting jakobbeckmann/chans_algorithm 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%2Fjakobbeckmann%2Fchans_algorithm" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakobbeckmann/chans_algorithm 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/jakobbeckmann/chans_algorithm
[INFO] finished tweaking git repo https://github.com/jakobbeckmann/chans_algorithm
[INFO] tweaked toml for git repo https://github.com/jakobbeckmann/chans_algorithm written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/jakobbeckmann/chans_algorithm 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 cc v1.0.2
[INFO] [stderr]   Downloaded serde-value v0.5.1
[INFO] [stderr]   Downloaded serde_yaml v0.7.1
[INFO] [stderr]   Downloaded log4rs v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 663181fd27b1d5326acee1e596c1dd2fe1ef5d03ac10b0ceba8e6a1c68db56c8
[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" "663181fd27b1d5326acee1e596c1dd2fe1ef5d03ac10b0ceba8e6a1c68db56c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "663181fd27b1d5326acee1e596c1dd2fe1ef5d03ac10b0ceba8e6a1c68db56c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "663181fd27b1d5326acee1e596c1dd2fe1ef5d03ac10b0ceba8e6a1c68db56c8", kill_on_drop: false }`
[INFO] [stdout] 663181fd27b1d5326acee1e596c1dd2fe1ef5d03ac10b0ceba8e6a1c68db56c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d9bb65f302a52bda5855b9b22935d4670733f93fde5b0a8c58faa3caeda54041
[INFO] running `Command { std: "docker" "start" "-a" "d9bb65f302a52bda5855b9b22935d4670733f93fde5b0a8c58faa3caeda54041", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]     Checking libc v0.2.32
[INFO] [stderr]    Compiling cc v1.0.2
[INFO] [stderr]     Checking serde v1.0.16
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking quick-error v1.2.1
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking fnv v1.0.5
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]     Checking humantime v1.0.0
[INFO] [stderr]     Checking csv-core v0.1.3
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking ordered-float v0.5.0
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking rand v0.3.17
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]    Compiling serde_derive v1.0.16
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking serde_json v1.0.4
[INFO] [stderr]     Checking serde-value v0.5.1
[INFO] [stderr]     Checking serde_yaml v0.7.1
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking log4rs v0.7.0
[INFO] [stderr]  Documenting chan v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.09s
[INFO] running `Command { std: "docker" "inspect" "d9bb65f302a52bda5855b9b22935d4670733f93fde5b0a8c58faa3caeda54041", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9bb65f302a52bda5855b9b22935d4670733f93fde5b0a8c58faa3caeda54041", kill_on_drop: false }`
[INFO] [stdout] d9bb65f302a52bda5855b9b22935d4670733f93fde5b0a8c58faa3caeda54041