[INFO] cloning repository https://github.com/apognu/aoc2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apognu/aoc2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapognu%2Faoc2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapognu%2Faoc2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5e4f1afb7d97c12ec1627ee298389359535a743
[INFO] testing apognu/aoc2019 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapognu%2Faoc2019" "/workspace/builds/worker-59/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-59/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apognu/aoc2019 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/apognu/aoc2019
[INFO] finished tweaking git repo https://github.com/apognu/aoc2019
[INFO] tweaked toml for git repo https://github.com/apognu/aoc2019 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] crate git repo https://github.com/apognu/aoc2019 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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] b3a3478d618a830c48873c1aec16b88c378b978a92654b0a1069b7ff62e94ed1
[INFO] running `Command { std: "docker" "start" "-a" "b3a3478d618a830c48873c1aec16b88c378b978a92654b0a1069b7ff62e94ed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3a3478d618a830c48873c1aec16b88c378b978a92654b0a1069b7ff62e94ed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3a3478d618a830c48873c1aec16b88c378b978a92654b0a1069b7ff62e94ed1", kill_on_drop: false }`
[INFO] [stdout] b3a3478d618a830c48873c1aec16b88c378b978a92654b0a1069b7ff62e94ed1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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] 9de1b71cdf27180440ea6cf4798cacbb75315ae34aca7f3f99f50da762d22afa
[INFO] running `Command { std: "docker" "start" "-a" "9de1b71cdf27180440ea6cf4798cacbb75315ae34aca7f3f99f50da762d22afa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling termion v1.5.4
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling aoc2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(pattern, vec_remove_item)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<Asteroid>` in the current scope
[INFO] [stdout]    --> src/challenges/y2019/d10.rs:189:19
[INFO] [stdout]     |
[INFO] [stdout] 189 |         asteroids.remove_item(&asteroid);
[INFO] [stdout]     |                   ^^^^^^^^^^^ method not found in `Vec<Asteroid>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc2019` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "9de1b71cdf27180440ea6cf4798cacbb75315ae34aca7f3f99f50da762d22afa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9de1b71cdf27180440ea6cf4798cacbb75315ae34aca7f3f99f50da762d22afa", kill_on_drop: false }`
[INFO] [stdout] 9de1b71cdf27180440ea6cf4798cacbb75315ae34aca7f3f99f50da762d22afa