[INFO] cloning repository https://github.com/k4nar/rustracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/k4nar/rustracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk4nar%2Frustracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk4nar%2Frustracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6dc499d14563dc0cfc6104037f62f2809d1494a
[INFO] documenting k4nar/rustracer 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%2Fk4nar%2Frustracer" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/k4nar/rustracer 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/k4nar/rustracer
[INFO] finished tweaking git repo https://github.com/k4nar/rustracer
[INFO] tweaked toml for git repo https://github.com/k4nar/rustracer written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/k4nar/rustracer 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]     Updating git repository `https://github.com/PistonDevelopers/image`
[INFO] [stderr] error: the lock file /workspace/builds/worker-8/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/PistonDevelopers/image`
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] f316b0e75694e55f69c8ee52c0100c7c5d7bbca3b7ee4ce6be1caad7fb1fb902
[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" "f316b0e75694e55f69c8ee52c0100c7c5d7bbca3b7ee4ce6be1caad7fb1fb902", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f316b0e75694e55f69c8ee52c0100c7c5d7bbca3b7ee4ce6be1caad7fb1fb902", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f316b0e75694e55f69c8ee52c0100c7c5d7bbca3b7ee4ce6be1caad7fb1fb902", kill_on_drop: false }`
[INFO] [stdout] f316b0e75694e55f69c8ee52c0100c7c5d7bbca3b7ee4ce6be1caad7fb1fb902
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 516f8e68e7a3ab2768cb2b7587cd5cfc0a515f0df5764c1b9d7b9c703595b22a
[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" "516f8e68e7a3ab2768cb2b7587cd5cfc0a515f0df5764c1b9d7b9c703595b22a", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking tiff v0.5.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking image v0.23.9 (https://github.com/PistonDevelopers/image#4e9c87a9)
[INFO] [stderr]  Documenting rustracer v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/main.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |   for x in (0..WIDTH) {
[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 `for` iterator expression
[INFO] [stdout]   --> src/main.rs:56:14
[INFO] [stdout]    |
[INFO] [stdout] 56 |     for y in (0..HEIGHT) {
[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 15.05s
[INFO] running `Command { std: "docker" "inspect" "516f8e68e7a3ab2768cb2b7587cd5cfc0a515f0df5764c1b9d7b9c703595b22a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "516f8e68e7a3ab2768cb2b7587cd5cfc0a515f0df5764c1b9d7b9c703595b22a", kill_on_drop: false }`
[INFO] [stdout] 516f8e68e7a3ab2768cb2b7587cd5cfc0a515f0df5764c1b9d7b9c703595b22a