[INFO] cloning repository https://github.com/Riari/aoc-2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Riari/aoc-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRiari%2Faoc-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRiari%2Faoc-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 183ab24242c4ae20970979f2ee8ac5f87ab2b586
[INFO] checking Riari/aoc-2020 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRiari%2Faoc-2020" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Riari/aoc-2020 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Riari/aoc-2020
[INFO] finished tweaking git repo https://github.com/Riari/aoc-2020
[INFO] tweaked toml for git repo https://github.com/Riari/aoc-2020 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Riari/aoc-2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2eeec4218b327545dc8d19be019d9a63f0d81283770930de29ddde8779aa3ecb
[INFO] running `Command { std: "docker" "start" "-a" "2eeec4218b327545dc8d19be019d9a63f0d81283770930de29ddde8779aa3ecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eeec4218b327545dc8d19be019d9a63f0d81283770930de29ddde8779aa3ecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eeec4218b327545dc8d19be019d9a63f0d81283770930de29ddde8779aa3ecb", kill_on_drop: false }`
[INFO] [stdout] 2eeec4218b327545dc8d19be019d9a63f0d81283770930de29ddde8779aa3ecb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe4b99a35258b7db8b3e5d914c75be83da0994f97e58fec89c1c1d61550e8928
[INFO] running `Command { std: "docker" "start" "-a" "fe4b99a35258b7db8b3e5d914c75be83da0994f97e58fec89c1c1d61550e8928", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking aoc-2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/07.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/09.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/05.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/16.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/12.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/04.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/14.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/12.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/01.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/18.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/13.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]   --> src/bin/20.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use util;
[INFO] [stdout]    |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/13.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_fold_self` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/20.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iterator_fold_self)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/08.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/08.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/18.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/03.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/13.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/13.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/02.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/16.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/22.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/10.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/24.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:208:30
[INFO] [stdout]     |
[INFO] [stdout] 208 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x <= b.pos.x && a.pos.y <= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/06.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/04.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/07.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/08.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/10.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/08.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:209:30
[INFO] [stdout]     |
[INFO] [stdout] 209 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x <= b.pos.x && a.pos.y >= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/02.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/21.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/09.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:210:30
[INFO] [stdout]     |
[INFO] [stdout] 210 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x >= b.pos.x && a.pos.y >= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/03.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/24.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/01.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:211:30
[INFO] [stdout]     |
[INFO] [stdout] 211 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x >= b.pos.x && a.pos.y <= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/21.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/05.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]   --> src/bin/20.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use util;
[INFO] [stdout]    |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/22.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `iterator_fold_self` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/bin/20.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iterator_fold_self)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/11.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/11.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc-2020` (bin "20" test) due to 5 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/14.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `util` is imported redundantly
[INFO] [stdout]  --> src/bin/06.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use util;
[INFO] [stdout]   |     ^^^^ the item `util` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:208:30
[INFO] [stdout]     |
[INFO] [stdout] 208 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x <= b.pos.x && a.pos.y <= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:209:30
[INFO] [stdout]     |
[INFO] [stdout] 209 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x <= b.pos.x && a.pos.y >= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:210:30
[INFO] [stdout]     |
[INFO] [stdout] 210 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x >= b.pos.x && a.pos.y >= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `std::slice::Iter` in the current scope
[INFO] [stdout]    --> src/bin/20.rs:211:30
[INFO] [stdout]     |
[INFO] [stdout] 211 |     corners.push(grid.iter().fold_first(|a, b| if a.pos.x >= b.pos.x && a.pos.y <= b.pos.y { a } else { b }).unwrap().id);
[INFO] [stdout]     |                              ^^^^^^^^^^ method not found in `Iter<'_, Tile>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc-2020` (bin "20") due to 5 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "fe4b99a35258b7db8b3e5d914c75be83da0994f97e58fec89c1c1d61550e8928", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe4b99a35258b7db8b3e5d914c75be83da0994f97e58fec89c1c1d61550e8928", kill_on_drop: false }`
[INFO] [stdout] fe4b99a35258b7db8b3e5d914c75be83da0994f97e58fec89c1c1d61550e8928