[INFO] cloning repository https://github.com/vbo/nnrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vbo/nnrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbo%2Fnnrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvbo%2Fnnrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2321ff9ded9e103826e2f6523d21cf5b8912a3b
[INFO] documenting vbo/nnrs 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%2Fvbo%2Fnnrs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vbo/nnrs 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/vbo/nnrs
[INFO] finished tweaking git repo https://github.com/vbo/nnrs
[INFO] tweaked toml for git repo https://github.com/vbo/nnrs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/vbo/nnrs 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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] a1fb574b7f879cfb421c8e7e5cb1f5d791f3f3e4a2ede9537ca20d28702e7e14
[INFO] running `Command { std: "docker" "start" "-a" "a1fb574b7f879cfb421c8e7e5cb1f5d791f3f3e4a2ede9537ca20d28702e7e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1fb574b7f879cfb421c8e7e5cb1f5d791f3f3e4a2ede9537ca20d28702e7e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1fb574b7f879cfb421c8e7e5cb1f5d791f3f3e4a2ede9537ca20d28702e7e14", kill_on_drop: false }`
[INFO] [stdout] a1fb574b7f879cfb421c8e7e5cb1f5d791f3f3e4a2ede9537ca20d28702e7e14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 513f2b2fc352ec3bc38317a6e44e6be291e4a9350e8117c7d010d3266d13bf9f
[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" "513f2b2fc352ec3bc38317a6e44e6be291e4a9350e8117c7d010d3266d13bf9f", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.43
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.3.7
[INFO] [stderr]     Checking atty v0.2.9
[INFO] [stderr]    Compiling rand_derive v0.3.1
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.43
[INFO] [stderr]     Checking serde_json v1.0.16
[INFO] [stderr]  Documenting nnrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/snake_nn.rs:340:8
[INFO] [stdout]     |
[INFO] [stdout] 340 |     if (rng.gen_range(0.0, 1.0) <= random_move_prob) {
[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 31.94s
[INFO] running `Command { std: "docker" "inspect" "513f2b2fc352ec3bc38317a6e44e6be291e4a9350e8117c7d010d3266d13bf9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "513f2b2fc352ec3bc38317a6e44e6be291e4a9350e8117c7d010d3266d13bf9f", kill_on_drop: false }`
[INFO] [stdout] 513f2b2fc352ec3bc38317a6e44e6be291e4a9350e8117c7d010d3266d13bf9f