[INFO] cloning repository https://github.com/caspark/character-frequency-analyser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caspark/character-frequency-analyser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2Fcharacter-frequency-analyser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaspark%2Fcharacter-frequency-analyser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b0450f8b9377ce3068107bfc697614156491173
[INFO] documenting caspark/character-frequency-analyser 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%2Fcaspark%2Fcharacter-frequency-analyser" "/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/caspark/character-frequency-analyser 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/caspark/character-frequency-analyser
[INFO] finished tweaking git repo https://github.com/caspark/character-frequency-analyser
[INFO] tweaked toml for git repo https://github.com/caspark/character-frequency-analyser written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/caspark/character-frequency-analyser 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 embed-resource v1.3.3
[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] 9cf4bf250b5743df968a4b00d8a25a95c53f24f1be4b7230de4393829c4093ed
[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" "9cf4bf250b5743df968a4b00d8a25a95c53f24f1be4b7230de4393829c4093ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cf4bf250b5743df968a4b00d8a25a95c53f24f1be4b7230de4393829c4093ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cf4bf250b5743df968a4b00d8a25a95c53f24f1be4b7230de4393829c4093ed", kill_on_drop: false }`
[INFO] [stdout] 9cf4bf250b5743df968a4b00d8a25a95c53f24f1be4b7230de4393829c4093ed
[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] baf57992a07eeb0f1f62aaf4cb9980b3a83061b067d545e93828ceabb6cdf98b
[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" "baf57992a07eeb0f1f62aaf4cb9980b3a83061b067d545e93828ceabb6cdf98b", kill_on_drop: false }`
[INFO] [stderr]    Compiling embed-resource v1.3.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]    Compiling char-freq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking ignore v0.4.15
[INFO] [stderr]  Documenting char-freq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.19s
[INFO] running `Command { std: "docker" "inspect" "baf57992a07eeb0f1f62aaf4cb9980b3a83061b067d545e93828ceabb6cdf98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baf57992a07eeb0f1f62aaf4cb9980b3a83061b067d545e93828ceabb6cdf98b", kill_on_drop: false }`
[INFO] [stdout] baf57992a07eeb0f1f62aaf4cb9980b3a83061b067d545e93828ceabb6cdf98b