[INFO] cloning repository https://github.com/matteocam/pay-to-sudoku-attack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matteocam/pay-to-sudoku-attack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cfc072fcdc17e10916185308edbdd232be808ad4
[INFO] documenting matteocam/pay-to-sudoku-attack 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%2Fmatteocam%2Fpay-to-sudoku-attack" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matteocam/pay-to-sudoku-attack 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/matteocam/pay-to-sudoku-attack
[INFO] finished tweaking git repo https://github.com/matteocam/pay-to-sudoku-attack
[INFO] tweaked toml for git repo https://github.com/matteocam/pay-to-sudoku-attack written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/matteocam/pay-to-sudoku-attack 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 clap v1.5.6
[INFO] [stderr]   Downloaded vec_map v0.4.0
[INFO] [stderr]   Downloaded num-bigint v0.1.37
[INFO] [stderr]   Downloaded bincode v0.4.1
[INFO] [stderr]   Downloaded bzip2 v0.2.4
[INFO] [stderr]   Downloaded whiteread v0.2.0
[INFO] [stderr]   Downloaded strason v0.3.4
[INFO] [stderr]   Downloaded num-complex v0.1.37
[INFO] [stderr]   Downloaded fixedbitset v0.1.6
[INFO] [stderr]   Downloaded strsim v0.4.1
[INFO] [stderr]   Downloaded jsonrpc v0.7.6
[INFO] [stderr]   Downloaded hex v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 335a66ba7a533d1025879394e584346d5813d2d553d994054c2f543a89270cc4
[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" "335a66ba7a533d1025879394e584346d5813d2d553d994054c2f543a89270cc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "335a66ba7a533d1025879394e584346d5813d2d553d994054c2f543a89270cc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "335a66ba7a533d1025879394e584346d5813d2d553d994054c2f543a89270cc4", kill_on_drop: false }`
[INFO] [stdout] 335a66ba7a533d1025879394e584346d5813d2d553d994054c2f543a89270cc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 13d315449ea1a4471c123b5a6392b347a77eaa4c018f8c82dffcefbfa1478bb2
[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" "13d315449ea1a4471c123b5a6392b347a77eaa4c018f8c82dffcefbfa1478bb2", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.23
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking httparse v1.2.2
[INFO] [stderr]     Checking language-tags v0.0.7
[INFO] [stderr]     Checking strsim v0.4.1
[INFO] [stderr]     Checking vec_map v0.4.0
[INFO] [stderr]     Checking byteorder v0.4.2
[INFO] [stderr]     Checking hex v0.1.0
[INFO] [stderr]     Checking fixedbitset v0.1.6
[INFO] [stderr]     Checking thread-scoped v1.0.1
[INFO] [stderr]     Checking whiteread v0.2.0
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking clap v1.5.6
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling bzip2-sys v0.1.5
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking flate2 v0.2.19
[INFO] [stderr]     Checking bzip2 v0.2.4
[INFO] [stderr]     Checking num-bigint v0.1.37
[INFO] [stderr]     Checking num-complex v0.1.37
[INFO] [stderr]     Checking uuid v0.1.18
[INFO] [stderr]     Checking url v0.2.38
[INFO] [stderr]     Checking num-rational v0.1.36
[INFO] [stderr]     Checking num v0.1.37
[INFO] [stderr]     Checking serde v0.6.15
[INFO] [stderr]     Checking cookie v0.1.21
[INFO] [stderr]     Checking mime v0.1.3
[INFO] [stderr]     Checking strason v0.3.4
[INFO] [stderr]     Checking bincode v0.4.1
[INFO] [stderr]     Checking hyper v0.6.16
[INFO] [stderr]     Checking jsonrpc v0.7.6
[INFO] [stderr]  Documenting pay-to-sudoku v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:311:28
[INFO] [stdout]     |
[INFO] [stdout] 311 |                         if (rx.lock().unwrap().try_recv().is_ok()) {
[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 22.90s
[INFO] running `Command { std: "docker" "inspect" "13d315449ea1a4471c123b5a6392b347a77eaa4c018f8c82dffcefbfa1478bb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13d315449ea1a4471c123b5a6392b347a77eaa4c018f8c82dffcefbfa1478bb2", kill_on_drop: false }`
[INFO] [stdout] 13d315449ea1a4471c123b5a6392b347a77eaa4c018f8c82dffcefbfa1478bb2