[INFO] cloning repository https://github.com/mpancia/aoc2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpancia/aoc2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpancia%2Faoc2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpancia%2Faoc2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6044149ca9ec2dca214c7abb3daa07551db742ba
[INFO] checking mpancia/aoc2020 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpancia%2Faoc2020" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpancia/aoc2020 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpancia/aoc2020
[INFO] finished tweaking git repo https://github.com/mpancia/aoc2020
[INFO] tweaked toml for git repo https://github.com/mpancia/aoc2020 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/mpancia/aoc2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8eed22778bde786fe78a2d0198b040ed99693a03054a7be15712ffcab1ab5e9
[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" "c8eed22778bde786fe78a2d0198b040ed99693a03054a7be15712ffcab1ab5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8eed22778bde786fe78a2d0198b040ed99693a03054a7be15712ffcab1ab5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8eed22778bde786fe78a2d0198b040ed99693a03054a7be15712ffcab1ab5e9", kill_on_drop: false }`
[INFO] [stdout] c8eed22778bde786fe78a2d0198b040ed99693a03054a7be15712ffcab1ab5e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33a5860de89cefba44a44dc7c9cc6da06e27dbdc2df5c1497ff18183987de66f
[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" "33a5860de89cefba44a44dc7c9cc6da06e27dbdc2df5c1497ff18183987de66f", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking parse v0.1.0 (/opt/rustwide/workdir/parse)
[INFO] [stdout] warning: cannot borrow `count_dict` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> parse/src/day02.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let curr_count = count_dict.get(&pass_char);
[INFO] [stdout]    |                          ---------- immutable borrow occurs here
[INFO] [stdout] 16 |         match curr_count.is_none() {
[INFO] [stdout] 17 |             false => count_dict.insert(pass_char, curr_count.unwrap() + 1),
[INFO] [stdout]    |                      ^^^^^^^^^^                   ---------- immutable borrow later used here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aoc2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.97s
[INFO] running `Command { std: "docker" "inspect" "33a5860de89cefba44a44dc7c9cc6da06e27dbdc2df5c1497ff18183987de66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33a5860de89cefba44a44dc7c9cc6da06e27dbdc2df5c1497ff18183987de66f", kill_on_drop: false }`
[INFO] [stdout] 33a5860de89cefba44a44dc7c9cc6da06e27dbdc2df5c1497ff18183987de66f