[INFO] cloning repository https://github.com/joshgarnett/adventofcode2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joshgarnett/adventofcode2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshgarnett%2Fadventofcode2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshgarnett%2Fadventofcode2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] de39199d75408ca8a51dde3b17da7c0e21e57a2a
[INFO] testing joshgarnett/adventofcode2018 against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshgarnett%2Fadventofcode2018" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joshgarnett/adventofcode2018 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joshgarnett/adventofcode2018
[INFO] finished tweaking git repo https://github.com/joshgarnett/adventofcode2018
[INFO] tweaked toml for git repo https://github.com/joshgarnett/adventofcode2018 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/joshgarnett/adventofcode2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.8.0
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.2.2
[INFO] [stderr]   Downloaded rayon-core v1.4.1
[INFO] [stderr]   Downloaded either v1.5.0
[INFO] [stderr]   Downloaded memoffset v0.2.1
[INFO] [stderr]   Downloaded scopeguard v0.3.3
[INFO] [stderr]   Downloaded crossbeam-deque v0.2.0
[INFO] [stderr]   Downloaded arrayvec v0.4.8
[INFO] [stderr]   Downloaded rayon v1.0.3
[INFO] [stderr]   Downloaded cfg-if v0.1.6
[INFO] [stderr]   Downloaded crossbeam-epoch v0.3.1
[INFO] [stderr]   Downloaded libc v0.2.44
[INFO] [stderr]   Downloaded regex-syntax v0.6.4
[INFO] [stderr]   Downloaded regex v1.1.0
[INFO] [stderr]   Downloaded memchr v2.1.1
[INFO] [stderr]   Downloaded aho-corasick v0.6.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cd7c9a06b1ee0576d51b90f06e749b04197b6a3eb5ab89ff306a8fe3e76edb3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1cd7c9a06b1ee0576d51b90f06e749b04197b6a3eb5ab89ff306a8fe3e76edb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cd7c9a06b1ee0576d51b90f06e749b04197b6a3eb5ab89ff306a8fe3e76edb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cd7c9a06b1ee0576d51b90f06e749b04197b6a3eb5ab89ff306a8fe3e76edb3", kill_on_drop: false }`
[INFO] [stdout] 1cd7c9a06b1ee0576d51b90f06e749b04197b6a3eb5ab89ff306a8fe3e76edb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4b8fb9498f0e523ac8abd8b0a509377ab52e8df64e541e2ab7388ebdcdcf47b5
[INFO] running `Command { std: "docker" "start" "-a" "4b8fb9498f0e523ac8abd8b0a509377ab52e8df64e541e2ab7388ebdcdcf47b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `advent` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4b8fb9498f0e523ac8abd8b0a509377ab52e8df64e541e2ab7388ebdcdcf47b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b8fb9498f0e523ac8abd8b0a509377ab52e8df64e541e2ab7388ebdcdcf47b5", kill_on_drop: false }`
[INFO] [stdout] 4b8fb9498f0e523ac8abd8b0a509377ab52e8df64e541e2ab7388ebdcdcf47b5
