[INFO] cloning repository https://github.com/misterToo/adv2022
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/misterToo/adv2022" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmisterToo%2Fadv2022", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmisterToo%2Fadv2022'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2595f440180c885e20e04fa51278dd70e276c3f
[INFO] checking misterToo/adv2022 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmisterToo%2Fadv2022" "/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/misterToo/adv2022 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/misterToo/adv2022
[INFO] finished tweaking git repo https://github.com/misterToo/adv2022
[INFO] tweaked toml for git repo https://github.com/misterToo/adv2022 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/misterToo/adv2022 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.16
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56415cef437b4584870ed3268a8499acb52798106e4c7880747937876cdb40c4
[INFO] running `Command { std: "docker" "start" "-a" "56415cef437b4584870ed3268a8499acb52798106e4c7880747937876cdb40c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56415cef437b4584870ed3268a8499acb52798106e4c7880747937876cdb40c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56415cef437b4584870ed3268a8499acb52798106e4c7880747937876cdb40c4", kill_on_drop: false }`
[INFO] [stdout] 56415cef437b4584870ed3268a8499acb52798106e4c7880747937876cdb40c4
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd324b1e31a7ebdb474958d2779235fbcb2f3061e35a506486dbbdadfcabd246
[INFO] running `Command { std: "docker" "start" "-a" "dd324b1e31a7ebdb474958d2779235fbcb2f3061e35a506486dbbdadfcabd246", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling cc v1.0.77
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking owo-colors v3.5.0
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.16
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking tracing-error v0.2.0
[INFO] [stderr]     Checking color-spantrace v0.2.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking color-eyre v0.6.2
[INFO] [stderr]     Checking adv2022 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut buf_reader = BufReader::new(file);
[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/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut buf_reader = BufReader::new(file);
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.41s
[INFO] running `Command { std: "docker" "inspect" "dd324b1e31a7ebdb474958d2779235fbcb2f3061e35a506486dbbdadfcabd246", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd324b1e31a7ebdb474958d2779235fbcb2f3061e35a506486dbbdadfcabd246", kill_on_drop: false }`
[INFO] [stdout] dd324b1e31a7ebdb474958d2779235fbcb2f3061e35a506486dbbdadfcabd246