[INFO] cloning repository https://github.com/Pluriscient/aoc2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pluriscient/aoc2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPluriscient%2Faoc2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPluriscient%2Faoc2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 036f665f9ee765ebf032fd01defbb70e64f86626
[INFO] testing Pluriscient/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%2FPluriscient%2Faoc2020" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Pluriscient/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/Pluriscient/aoc2020
[INFO] finished tweaking git repo https://github.com/Pluriscient/aoc2020
[INFO] tweaked toml for git repo https://github.com/Pluriscient/aoc2020 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Pluriscient/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]  Downloading crates ...
[INFO] [stderr]   Downloaded modinverse v0.1.1
[INFO] [stderr]   Downloaded prgrs v0.6.4
[INFO] [stderr]   Downloaded factorial v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 7bc193cb1e95dc263b69dfdf44e28c2918b1e59628f75ab584bf03c1817f926d
[INFO] running `Command { std: "docker" "start" "-a" "7bc193cb1e95dc263b69dfdf44e28c2918b1e59628f75ab584bf03c1817f926d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bc193cb1e95dc263b69dfdf44e28c2918b1e59628f75ab584bf03c1817f926d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bc193cb1e95dc263b69dfdf44e28c2918b1e59628f75ab584bf03c1817f926d", kill_on_drop: false }`
[INFO] [stdout] 7bc193cb1e95dc263b69dfdf44e28c2918b1e59628f75ab584bf03c1817f926d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] bc552ce7d2d23e13be83c8bce3e8f15bf97be676e6cc82784dfafea8bbd0a1da
[INFO] running `Command { std: "docker" "start" "-a" "bc552ce7d2d23e13be83c8bce3e8f15bf97be676e6cc82784dfafea8bbd0a1da", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling number_prefix v0.3.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling factorial v0.2.0
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling modinverse v0.1.1
[INFO] [stderr]    Compiling terminal_size v0.1.15
[INFO] [stderr]    Compiling console v0.13.0
[INFO] [stderr]    Compiling prgrs v0.6.4
[INFO] [stderr]    Compiling indicatif v0.15.0
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]    Compiling num_enum v0.5.1
[INFO] [stderr]    Compiling aoc2020 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(drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(hash_drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Prgrs`
[INFO] [stdout]  --> src/years/year2020/day15.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use prgrs::{Prgrs};
[INFO] [stdout]   |             ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/years/year2020/day15.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/years/year2020/day15.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for turn in (turn..turns) {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `factorial::Factorial`
[INFO] [stdout]  --> src/years/year2020/day16.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use factorial::Factorial;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hint::unreachable_unchecked`
[INFO] [stdout]  --> src/years/year2020/day16.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::hint::unreachable_unchecked;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/years/year2020/day18.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/years/year2020/day18.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Lines`
[INFO] [stdout]  --> src/years/year2020/day19.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::str::{FromStr, Lines};
[INFO] [stdout]   |                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/years/year2020/day20.rs:52:24
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 res |= (1 << i)
[INFO] [stdout]    |                        ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc2020` due to 3 previous errors; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "bc552ce7d2d23e13be83c8bce3e8f15bf97be676e6cc82784dfafea8bbd0a1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc552ce7d2d23e13be83c8bce3e8f15bf97be676e6cc82784dfafea8bbd0a1da", kill_on_drop: false }`
[INFO] [stdout] bc552ce7d2d23e13be83c8bce3e8f15bf97be676e6cc82784dfafea8bbd0a1da