[INFO] cloning repository https://github.com/Shuternay/factorization_machine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Shuternay/factorization_machine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShuternay%2Ffactorization_machine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShuternay%2Ffactorization_machine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f935feb6948591d30df2136b16576348f5c69c9b
[INFO] documenting Shuternay/factorization_machine 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%2FShuternay%2Ffactorization_machine" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Shuternay/factorization_machine 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/Shuternay/factorization_machine
[INFO] finished tweaking git repo https://github.com/Shuternay/factorization_machine
[INFO] tweaked toml for git repo https://github.com/Shuternay/factorization_machine written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Shuternay/factorization_machine 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 proc-macro2 v0.3.6
[INFO] [stderr]   Downloaded serde v1.0.37
[INFO] [stderr]   Downloaded serde_derive v1.0.37
[INFO] [stderr]   Downloaded regex v0.2.10
[INFO] [stderr]   Downloaded itertools v0.7.8
[INFO] [stderr]   Downloaded clippy v0.0.193
[INFO] [stderr]   Downloaded regex-syntax v0.5.3
[INFO] [stderr]   Downloaded clippy_lints v0.0.193
[INFO] [stderr]   Downloaded serde_json v1.0.17
[INFO] [stderr]   Downloaded quote v0.5.1
[INFO] [stderr]   Downloaded argparse v0.2.1
[INFO] [stderr]   Downloaded getopts v0.2.17
[INFO] [stderr]   Downloaded syn v0.13.1
[INFO] [stderr]   Downloaded pulldown-cmark v0.1.2
[INFO] [stderr]   Downloaded if_chain v0.1.2
[INFO] [stderr]   Downloaded url v1.7.0
[INFO] [stderr]   Downloaded quine-mc_cluskey v0.2.4
[INFO] [stderr]   Downloaded serde_derive_internals v0.23.0
[INFO] [stderr]   Downloaded itoa v0.4.1
[INFO] [stderr]   Downloaded ucd-util v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 3e39d4dfcdc88efa8cf9104a22a5f34341485e1d30db2be26badade6ae9d1cd7
[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" "3e39d4dfcdc88efa8cf9104a22a5f34341485e1d30db2be26badade6ae9d1cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e39d4dfcdc88efa8cf9104a22a5f34341485e1d30db2be26badade6ae9d1cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e39d4dfcdc88efa8cf9104a22a5f34341485e1d30db2be26badade6ae9d1cd7", kill_on_drop: false }`
[INFO] [stdout] 3e39d4dfcdc88efa8cf9104a22a5f34341485e1d30db2be26badade6ae9d1cd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] ab5fa7d02e257eb66f15009f8f4a537fba602509d42b59fbca2cef637ad02128
[INFO] running `Command { std: "docker" "start" "-a" "ab5fa7d02e257eb66f15009f8f4a537fba602509d42b59fbca2cef637ad02128", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking serde v1.0.37
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking argparse v0.2.1
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling proc-macro2 v0.3.6
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling quote v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.0
[INFO] [stderr]    Compiling serde_derive v1.0.37
[INFO] [stderr]     Checking serde_json v1.0.17
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]  Documenting factorization_machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/dataset.rs:92:74
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn from_csv(path: &str, target_field: &str, bits: u32) -> Result<(Dataset), Box<Error>> {
[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 8.93s
[INFO] running `Command { std: "docker" "inspect" "ab5fa7d02e257eb66f15009f8f4a537fba602509d42b59fbca2cef637ad02128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab5fa7d02e257eb66f15009f8f4a537fba602509d42b59fbca2cef637ad02128", kill_on_drop: false }`
[INFO] [stdout] ab5fa7d02e257eb66f15009f8f4a537fba602509d42b59fbca2cef637ad02128