[INFO] cloning repository https://github.com/maxsmoke/advent2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maxsmoke/advent2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 550028178a24e55a8007c7d2b0d38d7e40d66b35
[INFO] documenting maxsmoke/advent2019 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxsmoke%2Fadvent2019" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maxsmoke/advent2019 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] finished tweaking git repo https://github.com/maxsmoke/advent2019
[INFO] tweaked toml for git repo https://github.com/maxsmoke/advent2019 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/maxsmoke/advent2019 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efbee190cca794d902baa8caef3f9f96e97e0846b2442cb87b55cc8f47343e76
[INFO] running `Command { std: "docker" "start" "-a" "efbee190cca794d902baa8caef3f9f96e97e0846b2442cb87b55cc8f47343e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efbee190cca794d902baa8caef3f9f96e97e0846b2442cb87b55cc8f47343e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efbee190cca794d902baa8caef3f9f96e97e0846b2442cb87b55cc8f47343e76", kill_on_drop: false }`
[INFO] [stdout] efbee190cca794d902baa8caef3f9f96e97e0846b2442cb87b55cc8f47343e76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b32fdfc281af1bf09a32e9a3c060066a5939fa7f63d0149ba4f1bc1691f3c417
[INFO] running `Command { std: "docker" "start" "-a" "b32fdfc281af1bf09a32e9a3c060066a5939fa7f63d0149ba4f1bc1691f3c417", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]   --> src/problems/d4p2.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let low = 353_096;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high`
[INFO] [stdout]   --> src/problems/d4p2.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let high = 843_212;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_high`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `descends`
[INFO] [stdout]   --> src/problems/d4p2.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn descends(digits: Vec<u8>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/utils/mod.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         &instruction.push(dir);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = &instruction.push(dir);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.72s
[INFO] running `Command { std: "docker" "inspect" "b32fdfc281af1bf09a32e9a3c060066a5939fa7f63d0149ba4f1bc1691f3c417", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b32fdfc281af1bf09a32e9a3c060066a5939fa7f63d0149ba4f1bc1691f3c417", kill_on_drop: false }`
[INFO] [stdout] b32fdfc281af1bf09a32e9a3c060066a5939fa7f63d0149ba4f1bc1691f3c417
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=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" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 6b89a1a6a46dcedc6da7483308030f3f1c076f323bb1c078e932b5867fa73fd3
[INFO] running `Command { std: "docker" "start" "-a" "6b89a1a6a46dcedc6da7483308030f3f1c076f323bb1c078e932b5867fa73fd3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `Command { std: "docker" "inspect" "6b89a1a6a46dcedc6da7483308030f3f1c076f323bb1c078e932b5867fa73fd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b89a1a6a46dcedc6da7483308030f3f1c076f323bb1c078e932b5867fa73fd3", kill_on_drop: false }`
[INFO] [stdout] 6b89a1a6a46dcedc6da7483308030f3f1c076f323bb1c078e932b5867fa73fd3