[INFO] cloning repository https://github.com/msathis/adventofcode
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/msathis/adventofcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsathis%2Fadventofcode"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsathis%2Fadventofcode'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9e0c22e1cd476c6db26f38c4a95af7bfdda4b7ec
[INFO] testing msathis/adventofcode against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsathis%2Fadventofcode" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/msathis/adventofcode on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/msathis/adventofcode
[INFO] finished tweaking git repo https://github.com/msathis/adventofcode
[INFO] tweaked toml for git repo https://github.com/msathis/adventofcode written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/msathis/adventofcode already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6b4299325dc31c5e5eb8ce5194f4192a738bbd984d4147ef6df5874c2d28d549
[INFO] running `"docker" "start" "-a" "6b4299325dc31c5e5eb8ce5194f4192a738bbd984d4147ef6df5874c2d28d549"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling adventofcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day1.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day2.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day3.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day3.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day4.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_twos`
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_twos`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_threes`
[INFO] [stderr]   --> src/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_threes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `claims`
[INFO] [stderr]   --> src/day3.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let (hashmap, claims) = get_map(&buffer, &re);
[INFO] [stderr]    |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_claims`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/day3.rs:61:10
[INFO] [stderr]    |
[INFO] [stderr] 61 |     for (key, val) in &hashmap {
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/day4.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/day4.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total_map`
[INFO] [stderr]   --> src/day4.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (matrix_map, total_map) = get_max_guard(&logs);
[INFO] [stderr]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_total_map`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[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/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day1.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day2.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.93s
[INFO] running `"docker" "inspect" "6b4299325dc31c5e5eb8ce5194f4192a738bbd984d4147ef6df5874c2d28d549"`
[INFO] running `"docker" "rm" "-f" "6b4299325dc31c5e5eb8ce5194f4192a738bbd984d4147ef6df5874c2d28d549"`
[INFO] [stdout] 6b4299325dc31c5e5eb8ce5194f4192a738bbd984d4147ef6df5874c2d28d549
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f8746344d350df658ba15b2dc68c26a93f3c948765fd868e8e6e7f02e1372798
[INFO] running `"docker" "start" "-a" "f8746344d350df658ba15b2dc68c26a93f3c948765fd868e8e6e7f02e1372798"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling adventofcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day1.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day2.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day3.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day3.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day4.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_twos`
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_twos`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_threes`
[INFO] [stderr]   --> src/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_threes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `claims`
[INFO] [stderr]   --> src/day3.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let (hashmap, claims) = get_map(&buffer, &re);
[INFO] [stderr]    |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_claims`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/day3.rs:61:10
[INFO] [stderr]    |
[INFO] [stderr] 61 |     for (key, val) in &hashmap {
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/day4.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/day4.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total_map`
[INFO] [stderr]   --> src/day4.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (matrix_map, total_map) = get_max_guard(&logs);
[INFO] [stderr]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_total_map`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[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/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day1.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day2.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day1.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day2.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day3.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day3.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day4.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_twos`
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_twos`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_threes`
[INFO] [stderr]   --> src/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_threes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `claims`
[INFO] [stderr]   --> src/day3.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let (hashmap, claims) = get_map(&buffer, &re);
[INFO] [stderr]    |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_claims`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/day3.rs:61:10
[INFO] [stderr]    |
[INFO] [stderr] 61 |     for (key, val) in &hashmap {
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/day4.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/day4.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total_map`
[INFO] [stderr]   --> src/day4.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (matrix_map, total_map) = get_max_guard(&logs);
[INFO] [stderr]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_total_map`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[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/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day1.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day2.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "f8746344d350df658ba15b2dc68c26a93f3c948765fd868e8e6e7f02e1372798"`
[INFO] running `"docker" "rm" "-f" "f8746344d350df658ba15b2dc68c26a93f3c948765fd868e8e6e7f02e1372798"`
[INFO] [stdout] f8746344d350df658ba15b2dc68c26a93f3c948765fd868e8e6e7f02e1372798
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 57a33a0fe832283ef2a81cf093de49e5be370f1e8639f50f8696014c9100b75c
[INFO] running `"docker" "start" "-a" "57a33a0fe832283ef2a81cf093de49e5be370f1e8639f50f8696014c9100b75c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day1.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day2.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day3.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day3.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day4.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_twos`
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_twos`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_threes`
[INFO] [stderr]   --> src/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_threes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `claims`
[INFO] [stderr]   --> src/day3.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let (hashmap, claims) = get_map(&buffer, &re);
[INFO] [stderr]    |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_claims`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/day3.rs:61:10
[INFO] [stderr]    |
[INFO] [stderr] 61 |     for (key, val) in &hashmap {
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/day4.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/day4.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total_map`
[INFO] [stderr]   --> src/day4.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (matrix_map, total_map) = get_max_guard(&logs);
[INFO] [stderr]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_total_map`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[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/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day1.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day2.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day1.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day2.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day3.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day3.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdin`
[INFO] [stderr]  --> src/day4.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{Stdin, Read, stdin};
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::str::Chars`
[INFO] [stderr]  --> src/day4.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use core::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_twos`
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_twos`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_threes`
[INFO] [stderr]   --> src/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_threes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `claims`
[INFO] [stderr]   --> src/day3.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let (hashmap, claims) = get_map(&buffer, &re);
[INFO] [stderr]    |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_claims`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/day3.rs:61:10
[INFO] [stderr]    |
[INFO] [stderr] 61 |     for (key, val) in &hashmap {
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/day4.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                      ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/day4.rs:41:75
[INFO] [stderr]    |
[INFO] [stderr] 41 |     matrix_map.iter().filter(|&(&(g, v), _)| g == max_guard).for_each(|(&(g, v), val)| {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total_map`
[INFO] [stderr]   --> src/day4.rs:55:22
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (matrix_map, total_map) = get_max_guard(&logs);
[INFO] [stderr]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_total_map`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day2.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let mut has_twos = false;
[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/day2.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut has_threes = false;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day1.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/day2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day2.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day3.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/day4.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdin().read_to_string(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/advent-63ee08192d758026
[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/rustwide/target/debug/deps/adventofcode-a45e3beabec51aa3
[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 advent
[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" "57a33a0fe832283ef2a81cf093de49e5be370f1e8639f50f8696014c9100b75c"`
[INFO] running `"docker" "rm" "-f" "57a33a0fe832283ef2a81cf093de49e5be370f1e8639f50f8696014c9100b75c"`
[INFO] [stdout] 57a33a0fe832283ef2a81cf093de49e5be370f1e8639f50f8696014c9100b75c