[INFO] cloning repository https://github.com/w-culhane/pack_2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/w-culhane/pack_2048" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw-culhane%2Fpack_2048", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw-culhane%2Fpack_2048'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3de73554b72497eafda48ab42814ca1f698003bd
[INFO] documenting w-culhane/pack_2048 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw-culhane%2Fpack_2048" "/workspace/builds/worker-33/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-33/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/w-culhane/pack_2048 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/w-culhane/pack_2048
[INFO] finished tweaking git repo https://github.com/w-culhane/pack_2048
[INFO] tweaked toml for git repo https://github.com/w-culhane/pack_2048 written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] crate git repo https://github.com/w-culhane/pack_2048 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f76afd4962e0863a8cbe875d0a83fa2b3f968890933f71d3f7afa50a25f114c4
[INFO] running `Command { std: "docker" "start" "-a" "f76afd4962e0863a8cbe875d0a83fa2b3f968890933f71d3f7afa50a25f114c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f76afd4962e0863a8cbe875d0a83fa2b3f968890933f71d3f7afa50a25f114c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76afd4962e0863a8cbe875d0a83fa2b3f968890933f71d3f7afa50a25f114c4", kill_on_drop: false }`
[INFO] [stdout] f76afd4962e0863a8cbe875d0a83fa2b3f968890933f71d3f7afa50a25f114c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5701b0484397e19ef4c5d8f44e4571e551f3ea3fc3d55cc2e3565118a58e50cd
[INFO] running `Command { std: "docker" "start" "-a" "5701b0484397e19ef4c5d8f44e4571e551f3ea3fc3d55cc2e3565118a58e50cd", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]  Documenting pack_2048 v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pack_2048 v0.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         for mut row in &mut board.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |         for mut row in &mut board.iter_mut() {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.53s
[INFO] running `Command { std: "docker" "inspect" "5701b0484397e19ef4c5d8f44e4571e551f3ea3fc3d55cc2e3565118a58e50cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5701b0484397e19ef4c5d8f44e4571e551f3ea3fc3d55cc2e3565118a58e50cd", kill_on_drop: false }`
[INFO] [stdout] 5701b0484397e19ef4c5d8f44e4571e551f3ea3fc3d55cc2e3565118a58e50cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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" "RUSTFLAGS=--cap-lints=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 149559e7c8193b33e61b0c86bccf2b353c0dc6b8801f87909b1111173b521d53
[INFO] running `Command { std: "docker" "start" "-a" "149559e7c8193b33e61b0c86bccf2b353c0dc6b8801f87909b1111173b521d53", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]  Documenting pack_2048 v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "149559e7c8193b33e61b0c86bccf2b353c0dc6b8801f87909b1111173b521d53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "149559e7c8193b33e61b0c86bccf2b353c0dc6b8801f87909b1111173b521d53", kill_on_drop: false }`
[INFO] [stdout] 149559e7c8193b33e61b0c86bccf2b353c0dc6b8801f87909b1111173b521d53