[INFO] cloning repository https://github.com/PurpleMyst/aoc2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PurpleMyst/aoc2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Faoc2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Faoc2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9beeefd42581d33c264c3d7e30b5a135cdc06b28
[INFO] testing PurpleMyst/aoc2020 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Faoc2020" "/workspace/builds/worker-110/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-110/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PurpleMyst/aoc2020 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PurpleMyst/aoc2020
[INFO] finished tweaking git repo https://github.com/PurpleMyst/aoc2020
[INFO] tweaked toml for git repo https://github.com/PurpleMyst/aoc2020 written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] crate git repo https://github.com/PurpleMyst/aoc2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded static_assert_macro v1.1.0
[INFO] [stderr]   Downloaded ring-algorithm v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3edcae2d1e298d26957929b3308ba3de3c4aba7a6e7860f72692b4a14acbb9f0
[INFO] running `Command { std: "docker" "start" "-a" "3edcae2d1e298d26957929b3308ba3de3c4aba7a6e7860f72692b4a14acbb9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3edcae2d1e298d26957929b3308ba3de3c4aba7a6e7860f72692b4a14acbb9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3edcae2d1e298d26957929b3308ba3de3c4aba7a6e7860f72692b4a14acbb9f0", kill_on_drop: false }`
[INFO] [stdout] 3edcae2d1e298d26957929b3308ba3de3c4aba7a6e7860f72692b4a14acbb9f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 767ce50818fd3200cf3ea4cc856e8603b1f96acff8ebb20c57078256169aaf18
[INFO] running `Command { std: "docker" "start" "-a" "767ce50818fd3200cf3ea4cc856e8603b1f96acff8ebb20c57078256169aaf18", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling funty v1.0.1
[INFO] [stderr]    Compiling tap v1.0.0
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling bytecount v0.6.2
[INFO] [stderr]    Compiling static_assert_macro v1.1.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling day10 v1.0.0 (/opt/rustwide/workdir/day10)
[INFO] [stderr]    Compiling array_iterator v1.2.0
[INFO] [stderr]    Compiling day06 v1.0.0 (/opt/rustwide/workdir/day06)
[INFO] [stderr]    Compiling day16 v0.1.0 (/opt/rustwide/workdir/day16)
[INFO] [stderr]    Compiling day11 v1.0.0 (/opt/rustwide/workdir/day11)
[INFO] [stderr]    Compiling day22 v0.1.0 (/opt/rustwide/workdir/day22)
[INFO] [stderr]    Compiling day18 v0.1.0 (/opt/rustwide/workdir/day18)
[INFO] [stderr]    Compiling day15 v0.1.0 (/opt/rustwide/workdir/day15)
[INFO] [stderr]    Compiling day12 v0.1.0 (/opt/rustwide/workdir/day12)
[INFO] [stderr]    Compiling day05 v1.0.0 (/opt/rustwide/workdir/day05)
[INFO] [stderr]    Compiling day24 v0.1.0 (/opt/rustwide/workdir/day24)
[INFO] [stderr]    Compiling day21 v0.1.0 (/opt/rustwide/workdir/day21)
[INFO] [stderr]    Compiling day25 v0.1.0 (/opt/rustwide/workdir/day25)
[INFO] [stderr]    Compiling day17 v0.1.0 (/opt/rustwide/workdir/day17)
[INFO] [stderr]    Compiling day14 v0.1.0 (/opt/rustwide/workdir/day14)
[INFO] [stderr]    Compiling num-bigint v0.3.1
[INFO] [stderr]    Compiling day08 v1.0.0 (/opt/rustwide/workdir/day08)
[INFO] [stderr]    Compiling day07 v1.0.0 (/opt/rustwide/workdir/day07)
[INFO] [stderr]    Compiling day09 v1.0.0 (/opt/rustwide/workdir/day09)
[INFO] [stderr]    Compiling day04 v1.0.0 (/opt/rustwide/workdir/day04)
[INFO] [stderr]    Compiling day23 v0.1.0 (/opt/rustwide/workdir/day23)
[INFO] [stderr]    Compiling day02 v1.0.0 (/opt/rustwide/workdir/day02)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> day23/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(new_uninit)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `day23` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "767ce50818fd3200cf3ea4cc856e8603b1f96acff8ebb20c57078256169aaf18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "767ce50818fd3200cf3ea4cc856e8603b1f96acff8ebb20c57078256169aaf18", kill_on_drop: false }`
[INFO] [stdout] 767ce50818fd3200cf3ea4cc856e8603b1f96acff8ebb20c57078256169aaf18