[INFO] updating cached repository boylede/aoc2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/boylede/aoc2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/boylede/aoc2018" "work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/boylede/aoc2018" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/boylede/aoc2018"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/boylede/aoc2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fcadcc4580819046006fa3541905a3a530ff21cb
[INFO] sha for GitHub repo boylede/aoc2018: fcadcc4580819046006fa3541905a3a530ff21cb
[INFO] validating manifest of boylede/aoc2018 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of boylede/aoc2018 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing boylede/aoc2018
[INFO] finished frobbing boylede/aoc2018
[INFO] frobbed toml for boylede/aoc2018 written to work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018/Cargo.toml
[INFO] started frobbing boylede/aoc2018
[INFO] finished frobbing boylede/aoc2018
[INFO] frobbed toml for boylede/aoc2018 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/boylede/aoc2018/Cargo.toml
[INFO] crate boylede/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing boylede/aoc2018 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2bc80ce074de9f97a027aa25539d6ba4189c5f61dbac033801ec9bc0fc20a395
[INFO] running `"docker" "start" "-a" "2bc80ce074de9f97a027aa25539d6ba4189c5f61dbac033801ec9bc0fc20a395"`
[INFO] [stderr]    Compiling lapp v0.3.1
[INFO] [stderr]    Compiling crc32fast v1.1.0
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling html5ever v0.18.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling tendril v0.3.1
[INFO] [stderr]    Compiling libflate v0.1.19
[INFO] [stderr]    Compiling string_cache v0.6.2
[INFO] [stderr]    Compiling markup5ever v0.3.2
[INFO] [stderr]    Compiling tokio-uds v0.2.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling hyper v0.12.16
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling select v0.4.2
[INFO] [stderr]    Compiling reqwest v0.9.5
[INFO] [stderr]    Compiling aoc2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Attr`, `Class`
[INFO] [stderr]   --> src/lib.rs:13:36
[INFO] [stderr]    |
[INFO] [stderr] 13 | use select::predicate::{Predicate, Attr, Class, Name};
[INFO] [stderr]    |                                    ^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:133:6
[INFO] [stderr]     |
[INFO] [stderr] 133 |                     write!(buf, "## {}\n",node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:136:6
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     write!(buf, "{}\n\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:139:6
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     write!(buf, "\t{}\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:142:6
[INFO] [stderr]     |
[INFO] [stderr] 142 |                     write!(buf, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:144:6
[INFO] [stderr]     |
[INFO] [stderr] 144 |                     write!(buf, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:147:6
[INFO] [stderr]     |
[INFO] [stderr] 147 |                     write!(buf, "  * {}\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:150:6
[INFO] [stderr]     |
[INFO] [stderr] 150 |                     write!(buf, "\n<{}>\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:160:2
[INFO] [stderr]     |
[INFO] [stderr] 160 |     buf.seek(SeekFrom::Start(0));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/day6/mod.rs:117:12
[INFO] [stderr]     |
[INFO] [stderr] 117 |     } else if (distance == shortest_distance) {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day7/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::hash_map::Entry::Occupied`
[INFO] [stderr]   --> src/day7/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::hash_map::Entry::Occupied;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Display`
[INFO] [stderr]  --> src/day8/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day8/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day8/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Formatter`
[INFO] [stderr]  --> src/day8/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fmt::Formatter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/day8/mod.rs:71:36
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn visit_all(&self, visitor: &mut FnMut(&LicenseNode) ) {
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&LicenseNode)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day9/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day9/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day9/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day10/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day10/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day10/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day11/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day11/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day11/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day12/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day12/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day12/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day13/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day13/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day13/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day14/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day14/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day14/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day15/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day15/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day15/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day16/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day16/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day16/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day17/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day17/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day17/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day18/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day18/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day18/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day19/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day19/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day19/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day20/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day20/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day20/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day21/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day21/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day21/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day22/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day22/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day22/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day23/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day23/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day23/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day24/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day24/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day24/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day25/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day25/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day25/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]    --> src/day6/mod.rs:134:10
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]     |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parent`
[INFO] [stderr]    --> src/day6/mod.rs:200:7
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let parent = 0;
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_parent`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `distance`
[INFO] [stderr]    --> src/day6/mod.rs:201:7
[INFO] [stderr]     |
[INFO] [stderr] 201 |         let distance = 0;
[INFO] [stderr]     |             ^^^^^^^^ help: consider prefixing with an underscore: `_distance`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `step_id`
[INFO] [stderr]   --> src/day7/mod.rs:69:29
[INFO] [stderr]    |
[INFO] [stderr] 69 |     while outline.iter().any(|(step_id, step)| {
[INFO] [stderr]    |                                ^^^^^^^ help: consider prefixing with an underscore: `_step_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]    --> src/day7/mod.rs:124:10
[INFO] [stderr]     |
[INFO] [stderr] 124 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]     |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day8/mod.rs:60:10
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node_index`
[INFO] [stderr]    --> src/day8/mod.rs:102:6
[INFO] [stderr]     |
[INFO] [stderr] 102 |     for node_index in 0..*node_count {
[INFO] [stderr]     |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_node_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta_index`
[INFO] [stderr]    --> src/day8/mod.rs:106:6
[INFO] [stderr]     |
[INFO] [stderr] 106 |     for meta_index in 0..*meta_count {
[INFO] [stderr]     |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_meta_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day9/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day9/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day10/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day10/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day11/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day11/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day12/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day12/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day13/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day13/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day14/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day14/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day15/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day15/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day16/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day16/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day17/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day17/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day18/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day18/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day19/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day19/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day20/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day20/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day21/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day21/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day22/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day22/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day23/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day23/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day24/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day24/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day25/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day25/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day6/mod.rs:48:6
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut field = Grid::with_coordinates(&coordinates);
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/day7/mod.rs:104:16
[INFO] [stderr]     |
[INFO] [stderr] 104 |     for (step_id, mut step) in outline.iter() {
[INFO] [stderr]     |                   ----^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Unoccupied`
[INFO] [stderr]   --> src/day3/mod.rs:67:2
[INFO] [stderr]    |
[INFO] [stderr] 67 |     Unoccupied,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `parent`
[INFO] [stderr]    --> src/day6/mod.rs:159:2
[INFO] [stderr]     |
[INFO] [stderr] 159 |     parent: i32,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `distance`
[INFO] [stderr]    --> src/day6/mod.rs:160:2
[INFO] [stderr]     |
[INFO] [stderr] 160 |     distance: i32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cells`
[INFO] [stderr]    --> src/day6/mod.rs:164:2
[INFO] [stderr]     |
[INFO] [stderr] 164 |     cells: Vec<Position>,    // voronoi input points
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `AnyError`
[INFO] [stderr]    --> src/day7/mod.rs:157:2
[INFO] [stderr]     |
[INFO] [stderr] 157 |     AnyError,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LicenseDepthIter`
[INFO] [stderr]    --> src/day8/mod.rs:115:1
[INFO] [stderr]     |
[INFO] [stderr] 115 | struct LicenseDepthIter<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Error`
[INFO] [stderr]    --> src/day8/mod.rs:137:2
[INFO] [stderr]     |
[INFO] [stderr] 137 |     Error,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point4d`
[INFO] [stderr]   --> src/day25/mod.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Point4d {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `minus`
[INFO] [stderr]   --> src/day25/mod.rs:62:2
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn minus(&self, b: &Point4d) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `distance`
[INFO] [stderr]   --> src/day25/mod.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn distance(a: i32, b: i32) -> i32{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:205:4
[INFO] [stderr]     |
[INFO] [stderr] 205 |             write!(f, "{:?}:[", self.status);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:207:5
[INFO] [stderr]     |
[INFO] [stderr] 207 |                 write!(f, "{},", step);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:209:4
[INFO] [stderr]     |
[INFO] [stderr] 209 |             write!(f, "]");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:211:4
[INFO] [stderr]     |
[INFO] [stderr] 211 |             write!(f, "{:?}", self.status);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `"docker" "inspect" "2bc80ce074de9f97a027aa25539d6ba4189c5f61dbac033801ec9bc0fc20a395"`
[INFO] running `"docker" "rm" "-f" "2bc80ce074de9f97a027aa25539d6ba4189c5f61dbac033801ec9bc0fc20a395"`
[INFO] [stdout] 2bc80ce074de9f97a027aa25539d6ba4189c5f61dbac033801ec9bc0fc20a395
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 81068ac70e18925b1cb54caa05ab0547a85cb52f4116dc61b00708d3e353d5ac
[INFO] running `"docker" "start" "-a" "81068ac70e18925b1cb54caa05ab0547a85cb52f4116dc61b00708d3e353d5ac"`
[INFO] [stderr]    Compiling aoc2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Attr`, `Class`
[INFO] [stderr]   --> src/lib.rs:13:36
[INFO] [stderr]    |
[INFO] [stderr] 13 | use select::predicate::{Predicate, Attr, Class, Name};
[INFO] [stderr]    |                                    ^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:133:6
[INFO] [stderr]     |
[INFO] [stderr] 133 |                     write!(buf, "## {}\n",node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:136:6
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     write!(buf, "{}\n\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:139:6
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     write!(buf, "\t{}\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:142:6
[INFO] [stderr]     |
[INFO] [stderr] 142 |                     write!(buf, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:144:6
[INFO] [stderr]     |
[INFO] [stderr] 144 |                     write!(buf, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:147:6
[INFO] [stderr]     |
[INFO] [stderr] 147 |                     write!(buf, "  * {}\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:150:6
[INFO] [stderr]     |
[INFO] [stderr] 150 |                     write!(buf, "\n<{}>\n", node.text());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:160:2
[INFO] [stderr]     |
[INFO] [stderr] 160 |     buf.seek(SeekFrom::Start(0));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/day6/mod.rs:117:12
[INFO] [stderr]     |
[INFO] [stderr] 117 |     } else if (distance == shortest_distance) {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day7/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::hash_map::Entry::Occupied`
[INFO] [stderr]   --> src/day7/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::hash_map::Entry::Occupied;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Display`
[INFO] [stderr]  --> src/day8/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day8/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day8/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Formatter`
[INFO] [stderr]  --> src/day8/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fmt::Formatter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/day8/mod.rs:71:36
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn visit_all(&self, visitor: &mut FnMut(&LicenseNode) ) {
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&LicenseNode)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day9/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day9/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day9/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day10/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day10/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day10/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day11/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day11/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day11/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day12/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day12/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day12/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day13/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day13/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day13/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day14/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day14/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day14/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day15/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day15/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day15/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day16/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day16/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day16/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day17/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day17/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day17/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day18/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day18/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day18/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day19/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day19/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day19/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day20/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day20/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day20/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day21/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day21/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day21/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day22/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day22/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day22/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day23/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day23/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day23/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day24/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day24/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day24/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::ParseIntError`
[INFO] [stderr]  --> src/day25/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num::ParseIntError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/day25/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day25/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]    --> src/day6/mod.rs:134:10
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]     |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parent`
[INFO] [stderr]    --> src/day6/mod.rs:200:7
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let parent = 0;
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_parent`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `distance`
[INFO] [stderr]    --> src/day6/mod.rs:201:7
[INFO] [stderr]     |
[INFO] [stderr] 201 |         let distance = 0;
[INFO] [stderr]     |             ^^^^^^^^ help: consider prefixing with an underscore: `_distance`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `step_id`
[INFO] [stderr]   --> src/day7/mod.rs:69:29
[INFO] [stderr]    |
[INFO] [stderr] 69 |     while outline.iter().any(|(step_id, step)| {
[INFO] [stderr]    |                                ^^^^^^^ help: consider prefixing with an underscore: `_step_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]    --> src/day7/mod.rs:124:10
[INFO] [stderr]     |
[INFO] [stderr] 124 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]     |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day8/mod.rs:60:10
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node_index`
[INFO] [stderr]    --> src/day8/mod.rs:102:6
[INFO] [stderr]     |
[INFO] [stderr] 102 |     for node_index in 0..*node_count {
[INFO] [stderr]     |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_node_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta_index`
[INFO] [stderr]    --> src/day8/mod.rs:106:6
[INFO] [stderr]     |
[INFO] [stderr] 106 |     for meta_index in 0..*meta_count {
[INFO] [stderr]     |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_meta_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day9/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day9/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day10/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day10/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day11/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day11/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day12/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day12/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day13/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day13/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day14/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day14/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day15/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day15/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day16/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day16/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day17/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day17/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day18/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day18/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day19/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day19/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day20/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day20/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day21/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day21/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day22/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day22/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day23/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day23/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day24/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day24/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day25/mod.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn part1(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lines`
[INFO] [stderr]   --> src/day25/mod.rs:49:10
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn part2(lines: &Vec<String>) {
[INFO] [stderr]    |          ^^^^^ help: consider prefixing with an underscore: `_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day6/mod.rs:48:6
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut field = Grid::with_coordinates(&coordinates);
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/day7/mod.rs:104:16
[INFO] [stderr]     |
[INFO] [stderr] 104 |     for (step_id, mut step) in outline.iter() {
[INFO] [stderr]     |                   ----^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Unoccupied`
[INFO] [stderr]   --> src/day3/mod.rs:67:2
[INFO] [stderr]    |
[INFO] [stderr] 67 |     Unoccupied,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `parent`
[INFO] [stderr]    --> src/day6/mod.rs:159:2
[INFO] [stderr]     |
[INFO] [stderr] 159 |     parent: i32,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `distance`
[INFO] [stderr]    --> src/day6/mod.rs:160:2
[INFO] [stderr]     |
[INFO] [stderr] 160 |     distance: i32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cells`
[INFO] [stderr]    --> src/day6/mod.rs:164:2
[INFO] [stderr]     |
[INFO] [stderr] 164 |     cells: Vec<Position>,    // voronoi input points
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `AnyError`
[INFO] [stderr]    --> src/day7/mod.rs:157:2
[INFO] [stderr]     |
[INFO] [stderr] 157 |     AnyError,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LicenseDepthIter`
[INFO] [stderr]    --> src/day8/mod.rs:115:1
[INFO] [stderr]     |
[INFO] [stderr] 115 | struct LicenseDepthIter<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Error`
[INFO] [stderr]    --> src/day8/mod.rs:137:2
[INFO] [stderr]     |
[INFO] [stderr] 137 |     Error,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point4d`
[INFO] [stderr]   --> src/day25/mod.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Point4d {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `minus`
[INFO] [stderr]   --> src/day25/mod.rs:62:2
[INFO] [stderr]    |
[INFO] [stderr] 62 |     fn minus(&self, b: &Point4d) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `distance`
[INFO] [stderr]   --> src/day25/mod.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn distance(a: i32, b: i32) -> i32{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:205:4
[INFO] [stderr]     |
[INFO] [stderr] 205 |             write!(f, "{:?}:[", self.status);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:207:5
[INFO] [stderr]     |
[INFO] [stderr] 207 |                 write!(f, "{},", step);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:209:4
[INFO] [stderr]     |
[INFO] [stderr] 209 |             write!(f, "]");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day7/mod.rs:211:4
[INFO] [stderr]     |
[INFO] [stderr] 211 |             write!(f, "{:?}", self.status);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.00s
[INFO] running `"docker" "inspect" "81068ac70e18925b1cb54caa05ab0547a85cb52f4116dc61b00708d3e353d5ac"`
[INFO] running `"docker" "rm" "-f" "81068ac70e18925b1cb54caa05ab0547a85cb52f4116dc61b00708d3e353d5ac"`
[INFO] [stdout] 81068ac70e18925b1cb54caa05ab0547a85cb52f4116dc61b00708d3e353d5ac
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/boylede/aoc2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 741c12cb26e559a3191b98601431a2c127f104e67cf34247f394b182e7bf808a
[INFO] running `"docker" "start" "-a" "741c12cb26e559a3191b98601431a2c127f104e67cf34247f394b182e7bf808a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aoc2018-6617042bac893f47
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aoc2018-6c80a96c680a4f30
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests aoc2018
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "741c12cb26e559a3191b98601431a2c127f104e67cf34247f394b182e7bf808a"`
[INFO] running `"docker" "rm" "-f" "741c12cb26e559a3191b98601431a2c127f104e67cf34247f394b182e7bf808a"`
[INFO] [stdout] 741c12cb26e559a3191b98601431a2c127f104e67cf34247f394b182e7bf808a