[INFO] cloning repository https://github.com/ferrouswheel/superpixel-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ferrouswheel/superpixel-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrouswheel%2Fsuperpixel-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrouswheel%2Fsuperpixel-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84e20c5c95e88022f935ef63dd0377152aa6276c
[INFO] documenting ferrouswheel/superpixel-rs 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%2Fferrouswheel%2Fsuperpixel-rs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ferrouswheel/superpixel-rs 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/ferrouswheel/superpixel-rs
[INFO] finished tweaking git repo https://github.com/ferrouswheel/superpixel-rs
[INFO] tweaked toml for git repo https://github.com/ferrouswheel/superpixel-rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ferrouswheel/superpixel-rs 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 num-rational v0.1.39
[INFO] [stderr]   Downloaded deflate v0.7.14
[INFO] [stderr]   Downloaded rand v0.3.16
[INFO] [stderr]   Downloaded libc v0.2.28
[INFO] [stderr]   Downloaded scoped_threadpool v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] d25d410b5539a8fc7d673c1e55e1aa5eeaed821a4fd6955186afa09809e2f3a7
[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" "d25d410b5539a8fc7d673c1e55e1aa5eeaed821a4fd6955186afa09809e2f3a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d25d410b5539a8fc7d673c1e55e1aa5eeaed821a4fd6955186afa09809e2f3a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d25d410b5539a8fc7d673c1e55e1aa5eeaed821a4fd6955186afa09809e2f3a7", kill_on_drop: false }`
[INFO] [stdout] d25d410b5539a8fc7d673c1e55e1aa5eeaed821a4fd6955186afa09809e2f3a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 7d3df1b094acdf263f153c0283c23a0971142b939810f300b23a58aea421c704
[INFO] running `Command { std: "docker" "start" "-a" "7d3df1b094acdf263f153c0283c23a0971142b939810f300b23a58aea421c704", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.17
[INFO] [stderr]     Checking libc v0.2.28
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking deflate v0.7.14
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking rayon-core v1.2.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]  Documenting superpixel v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:480:17
[INFO] [stdout]     |
[INFO] [stdout] 480 |                 ((y - 1) * width + x)
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lib.rs:487:17
[INFO] [stdout]     |
[INFO] [stdout] 487 |                 (y * width + (x - 1))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.88s
[INFO] running `Command { std: "docker" "inspect" "7d3df1b094acdf263f153c0283c23a0971142b939810f300b23a58aea421c704", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d3df1b094acdf263f153c0283c23a0971142b939810f300b23a58aea421c704", kill_on_drop: false }`
[INFO] [stdout] 7d3df1b094acdf263f153c0283c23a0971142b939810f300b23a58aea421c704