[INFO] cloning repository https://github.com/butlersrepos/advent-of-code-2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/butlersrepos/advent-of-code-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbutlersrepos%2Fadvent-of-code-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbutlersrepos%2Fadvent-of-code-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 812dfee2c731280f5ebed5aecaffcffc56466458
[INFO] checking butlersrepos/advent-of-code-2020 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbutlersrepos%2Fadvent-of-code-2020" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/butlersrepos/advent-of-code-2020 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/butlersrepos/advent-of-code-2020
[INFO] finished tweaking git repo https://github.com/butlersrepos/advent-of-code-2020
[INFO] tweaked toml for git repo https://github.com/butlersrepos/advent-of-code-2020 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/butlersrepos/advent-of-code-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a578c0a8ba32d3818e5fef115f997c1f167fceb759f44207b6b9f7ff5c308cf9
[INFO] running `Command { std: "docker" "start" "-a" "a578c0a8ba32d3818e5fef115f997c1f167fceb759f44207b6b9f7ff5c308cf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a578c0a8ba32d3818e5fef115f997c1f167fceb759f44207b6b9f7ff5c308cf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a578c0a8ba32d3818e5fef115f997c1f167fceb759f44207b6b9f7ff5c308cf9", kill_on_drop: false }`
[INFO] [stdout] a578c0a8ba32d3818e5fef115f997c1f167fceb759f44207b6b9f7ff5c308cf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7b381aaa288280d720a8eaf6cb3706fa49bf85af79e8a5a9c07e909abdea1364
[INFO] running `Command { std: "docker" "start" "-a" "7b381aaa288280d720a8eaf6cb3706fa49bf85af79e8a5a9c07e909abdea1364", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `name` and `contents` are never read
[INFO] [stdout]  --> src/bin/day-07.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Bag {
[INFO] [stdout]   |        --- fields in this struct
[INFO] [stdout] 6 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     contents: Option<Vec<(Bag, usize)>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `contents` are never read
[INFO] [stdout]  --> src/bin/day-07.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Bag {
[INFO] [stdout]   |        --- fields in this struct
[INFO] [stdout] 6 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     contents: Option<Vec<(Bag, usize)>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` 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 3.48s
[INFO] running `Command { std: "docker" "inspect" "7b381aaa288280d720a8eaf6cb3706fa49bf85af79e8a5a9c07e909abdea1364", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b381aaa288280d720a8eaf6cb3706fa49bf85af79e8a5a9c07e909abdea1364", kill_on_drop: false }`
[INFO] [stdout] 7b381aaa288280d720a8eaf6cb3706fa49bf85af79e8a5a9c07e909abdea1364