[INFO] cloning repository https://github.com/nicmr/aoc2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nicmr/aoc2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicmr%2Faoc2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicmr%2Faoc2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a48d2dfa3a3e1330fc44dcdc988d28f2b8bb6038
[INFO] testing nicmr/aoc2020 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicmr%2Faoc2020" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nicmr/aoc2020 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nicmr/aoc2020
[INFO] finished tweaking git repo https://github.com/nicmr/aoc2020
[INFO] tweaked toml for git repo https://github.com/nicmr/aoc2020 written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate git repo https://github.com/nicmr/aoc2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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 memchr v2.4.0
[INFO] [stderr]   Downloaded aho-corasick v0.7.18
[INFO] [stderr]   Downloaded regex-syntax v0.6.25
[INFO] [stderr]   Downloaded regex v1.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 648bfdaa189409be2da122b3b0a26b01a44e30468a813ac19c4eb42c21d774bd
[INFO] running `Command { std: "docker" "start" "-a" "648bfdaa189409be2da122b3b0a26b01a44e30468a813ac19c4eb42c21d774bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "648bfdaa189409be2da122b3b0a26b01a44e30468a813ac19c4eb42c21d774bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "648bfdaa189409be2da122b3b0a26b01a44e30468a813ac19c4eb42c21d774bd", kill_on_drop: false }`
[INFO] [stdout] 648bfdaa189409be2da122b3b0a26b01a44e30468a813ac19c4eb42c21d774bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5047f651105bab26e5e8a8434ae9cdcf7102ec2ffe5f9576bd5b640a9c365d8
[INFO] running `Command { std: "docker" "start" "-a" "d5047f651105bab26e5e8a8434ae9cdcf7102ec2ffe5f9576bd5b640a9c365d8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling aoc2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]   --> src/day8.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let input = std::fs::read_to_string("inputs/d8").unwrap();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `self.previously_executed` as mutable, as it is behind a `&` reference
[INFO] [stdout]   --> src/day8.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn step(&self) -> (bool, usize, i64) {
[INFO] [stdout]    |             ----- help: consider changing this to be a mutable reference: `&mut self`
[INFO] [stdout] 50 |         // false if already contained, so negate the value
[INFO] [stdout] 51 |         let loop_found = !self.previously_executed.insert(self.ip_pos);
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc2020` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d5047f651105bab26e5e8a8434ae9cdcf7102ec2ffe5f9576bd5b640a9c365d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5047f651105bab26e5e8a8434ae9cdcf7102ec2ffe5f9576bd5b640a9c365d8", kill_on_drop: false }`
[INFO] [stdout] d5047f651105bab26e5e8a8434ae9cdcf7102ec2ffe5f9576bd5b640a9c365d8