[INFO] cloning repository https://github.com/PipocaQuemada/rainfuck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PipocaQuemada/rainfuck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPipocaQuemada%2Frainfuck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPipocaQuemada%2Frainfuck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dec4ad890606a61aeb34654ddcbac2c967e05995
[INFO] documenting PipocaQuemada/rainfuck 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%2FPipocaQuemada%2Frainfuck" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PipocaQuemada/rainfuck 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/PipocaQuemada/rainfuck
[INFO] finished tweaking git repo https://github.com/PipocaQuemada/rainfuck
[INFO] tweaked toml for git repo https://github.com/PipocaQuemada/rainfuck written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/PipocaQuemada/rainfuck 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] c21b3fa5d059725ed9c43b4f79289d54a6dac93363ffdf810d2d543f551960ab
[INFO] running `Command { std: "docker" "start" "-a" "c21b3fa5d059725ed9c43b4f79289d54a6dac93363ffdf810d2d543f551960ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c21b3fa5d059725ed9c43b4f79289d54a6dac93363ffdf810d2d543f551960ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c21b3fa5d059725ed9c43b4f79289d54a6dac93363ffdf810d2d543f551960ab", kill_on_drop: false }`
[INFO] [stdout] c21b3fa5d059725ed9c43b4f79289d54a6dac93363ffdf810d2d543f551960ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 269c9ea8af724ad0f782e8d17113be195eac437aca1457029438843c657cff61
[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" "269c9ea8af724ad0f782e8d17113be195eac437aca1457029438843c657cff61", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.0.2
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]  Documenting rainfuck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `return` value
[INFO] [stdout]   --> src/ast.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |                 return (Some(acc));
[INFO] [stdout]    |                        ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "269c9ea8af724ad0f782e8d17113be195eac437aca1457029438843c657cff61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "269c9ea8af724ad0f782e8d17113be195eac437aca1457029438843c657cff61", kill_on_drop: false }`
[INFO] [stdout] 269c9ea8af724ad0f782e8d17113be195eac437aca1457029438843c657cff61