[INFO] cloning repository https://github.com/scottschroeder/advent_of_code_2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scottschroeder/advent_of_code_2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fadvent_of_code_2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fadvent_of_code_2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b623999d2ada323305e65bb8caaeb64310b548a4
[INFO] testing scottschroeder/advent_of_code_2019 against beta-2021-09-12 for beta-1.56-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fadvent_of_code_2019" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scottschroeder/advent_of_code_2019 on toolchain beta-2021-09-12
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scottschroeder/advent_of_code_2019
[INFO] finished tweaking git repo https://github.com/scottschroeder/advent_of_code_2019
[INFO] tweaked toml for git repo https://github.com/scottschroeder/advent_of_code_2019 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/scottschroeder/advent_of_code_2019 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2021-09-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf1f94e9b0eb89953bdc54f3ddeb7486465960f28745f3737ee304460eba9cfe
[INFO] running `Command { std: "docker" "start" "-a" "cf1f94e9b0eb89953bdc54f3ddeb7486465960f28745f3737ee304460eba9cfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf1f94e9b0eb89953bdc54f3ddeb7486465960f28745f3737ee304460eba9cfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf1f94e9b0eb89953bdc54f3ddeb7486465960f28745f3737ee304460eba9cfe", kill_on_drop: false }`
[INFO] [stdout] cf1f94e9b0eb89953bdc54f3ddeb7486465960f28745f3737ee304460eba9cfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2021-09-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01ed9e5fd3cfccfb5c9a322e78bca38457fa722c5b0e5cde29f82e1fe8c69eff
[INFO] running `Command { std: "docker" "start" "-a" "01ed9e5fd3cfccfb5c9a322e78bca38457fa722c5b0e5cde29f82e1fe8c69eff", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[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-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling advent_of_code_2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_roundings'
[INFO] [stdout]   --> src/challenges/day14/spacechem/mod.rs:97:50
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let iterations_required = needed.div_ceil(&r.output.amount);
[INFO] [stdout]    |                                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #88581 <https://github.com/rust-lang/rust/issues/88581> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/challenges/day14/spacechem/mod.rs:97:59
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let iterations_required = needed.div_ceil(&r.output.amount);
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^ expected `i64`, found `&i64`
[INFO] [stdout]    |
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 97 -                 let iterations_required = needed.div_ceil(&r.output.amount);
[INFO] [stdout] 97 +                 let iterations_required = needed.div_ceil(r.output.amount);
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::Integer`
[INFO] [stdout]  --> src/challenges/day14/spacechem/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use num::Integer;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advent_of_code_2019` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "01ed9e5fd3cfccfb5c9a322e78bca38457fa722c5b0e5cde29f82e1fe8c69eff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01ed9e5fd3cfccfb5c9a322e78bca38457fa722c5b0e5cde29f82e1fe8c69eff", kill_on_drop: false }`
[INFO] [stdout] 01ed9e5fd3cfccfb5c9a322e78bca38457fa722c5b0e5cde29f82e1fe8c69eff