[INFO] cloning repository https://github.com/redwarp/advent-2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redwarp/advent-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Fadvent-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Fadvent-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2894f7f036a8f50cde7c3d708dc3684045f6b2c7
[INFO] checking redwarp/advent-2020 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Fadvent-2020" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/redwarp/advent-2020 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/redwarp/advent-2020
[INFO] finished tweaking git repo https://github.com/redwarp/advent-2020
[INFO] tweaked toml for git repo https://github.com/redwarp/advent-2020 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/redwarp/advent-2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca1fd95416ae20c519064de0f71a3f6115f504b3c67000c3bc30c2c059c73500
[INFO] running `Command { std: "docker" "start" "-a" "ca1fd95416ae20c519064de0f71a3f6115f504b3c67000c3bc30c2c059c73500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca1fd95416ae20c519064de0f71a3f6115f504b3c67000c3bc30c2c059c73500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca1fd95416ae20c519064de0f71a3f6115f504b3c67000c3bc30c2c059c73500", kill_on_drop: false }`
[INFO] [stdout] ca1fd95416ae20c519064de0f71a3f6115f504b3c67000c3bc30c2c059c73500
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 977c99896c39d232bf63f0f81981173d5cba48e6059be01d51e9fb18b3abd974
[INFO] running `Command { std: "docker" "start" "-a" "977c99896c39d232bf63f0f81981173d5cba48e6059be01d51e9fb18b3abd974", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking advent-2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `todo`
[INFO] [stdout]  --> src/day10.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     todo, vec,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `todo`
[INFO] [stdout]  --> src/day10.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     todo, vec,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day08.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 let mut line = lines.get_mut(index).unwrap();
[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/day08.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 let mut line = lines.get_mut(index).unwrap();
[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: function `calculate_possible_plugs` is never used
[INFO] [stdout]   --> src/day10.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn calculate_possible_plugs(sockets: &Vec<u32>) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/day10.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct Branch {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 66 |     index: usize,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Branch` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_possible_plugs` is never used
[INFO] [stdout]   --> src/day10.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn calculate_possible_plugs(sockets: &Vec<u32>) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/day10.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct Branch {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 66 |     index: usize,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Branch` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "977c99896c39d232bf63f0f81981173d5cba48e6059be01d51e9fb18b3abd974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "977c99896c39d232bf63f0f81981173d5cba48e6059be01d51e9fb18b3abd974", kill_on_drop: false }`
[INFO] [stdout] 977c99896c39d232bf63f0f81981173d5cba48e6059be01d51e9fb18b3abd974