[INFO] cloning repository https://github.com/martin-dsa/advent_of_code_2015
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/martin-dsa/advent_of_code_2015" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartin-dsa%2Fadvent_of_code_2015", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartin-dsa%2Fadvent_of_code_2015'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c79d8225ecf2a1eec30706e203623d723469eb0b
[INFO] checking martin-dsa/advent_of_code_2015 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartin-dsa%2Fadvent_of_code_2015" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/martin-dsa/advent_of_code_2015
[INFO] finished tweaking git repo https://github.com/martin-dsa/advent_of_code_2015
[INFO] tweaked toml for git repo https://github.com/martin-dsa/advent_of_code_2015 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/martin-dsa/advent_of_code_2015 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/martin-dsa/advent_of_code_2015 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7738d6ec4547b5c75a0d5b885cb234d0eed32f2d97a284a7f4dd2b59f029efc9
[INFO] running `Command { std: "docker" "start" "-a" "7738d6ec4547b5c75a0d5b885cb234d0eed32f2d97a284a7f4dd2b59f029efc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7738d6ec4547b5c75a0d5b885cb234d0eed32f2d97a284a7f4dd2b59f029efc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7738d6ec4547b5c75a0d5b885cb234d0eed32f2d97a284a7f4dd2b59f029efc9", kill_on_drop: false }`
[INFO] [stdout] 7738d6ec4547b5c75a0d5b885cb234d0eed32f2d97a284a7f4dd2b59f029efc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8117a9dad0f825e963260ba6988945b12d7551407fb9f4b9c3724e24129120ba
[INFO] running `Command { std: "docker" "start" "-a" "8117a9dad0f825e963260ba6988945b12d7551407fb9f4b9c3724e24129120ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.181
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking pico-args v0.5.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking regex-automata v0.3.4
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]     Checking fancy-regex v0.11.0
[INFO] [stderr]     Checking advent_of_code v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<ActionType, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:11:53
[INFO] [stdout]    |
[INFO] [stdout] 11 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 12 | |         Ok(match s {
[INFO] [stdout] 13 | |             "on" => ActionType::On,
[INFO] [stdout] 14 | |             "off" => ActionType::Off,
[INFO] [stdout] 15 | |             _ => panic!(),
[INFO] [stdout] 16 | |         })
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ActionType, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | /         Ok(match s {
[INFO] [stdout] 13 | |             "on" => ActionType::On,
[INFO] [stdout] 14 | |             "off" => ActionType::Off,
[INFO] [stdout] 15 | |             _ => panic!(),
[INFO] [stdout] 16 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:26:53
[INFO] [stdout]    |
[INFO] [stdout] 26 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 27 | |         s.split_once(',')
[INFO] [stdout] 28 | |             .map(|(x, y)| {
[INFO] [stdout] 29 | |                 let x = x.parse().unwrap();
[INFO] [stdout] ...  |
[INFO] [stdout] 33 | |             .unwrap()
[INFO] [stdout] 34 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         s.split_once(',')
[INFO] [stdout] 28 | |             .map(|(x, y)| {
[INFO] [stdout] 29 | |                 let x = x.parse().unwrap();
[INFO] [stdout] 30 | |                 let y = y.parse().unwrap();
[INFO] [stdout] 31 | |                 Ok(Self { x, y })
[INFO] [stdout] 32 | |             })
[INFO] [stdout] 33 | |             .unwrap()
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:28:27
[INFO] [stdout]    |
[INFO] [stdout] 28 |               .map(|(x, y)| {
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 29 | |                 let x = x.parse().unwrap();
[INFO] [stdout] 30 | |                 let y = y.parse().unwrap();
[INFO] [stdout] 31 | |                 Ok(Self { x, y })
[INFO] [stdout] 32 | |             })
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:31:17
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Ok(Self { x, y })
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:45:53
[INFO] [stdout]    |
[INFO] [stdout] 45 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 46 | |         let words = s.split_whitespace().collect::<Vec<_>>();
[INFO] [stdout] 47 | |         match words.len() {
[INFO] [stdout] 48 | |             4 => Ok(Self {
[INFO] [stdout] ...  |
[INFO] [stdout] 61 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | /         match words.len() {
[INFO] [stdout] 48 | |             4 => Ok(Self {
[INFO] [stdout] 49 | |                 t: ActionType::Toggle,
[INFO] [stdout] 50 | |                 from: words[1].parse().unwrap(),
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |             _ => panic!(),
[INFO] [stdout] 60 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:48:18
[INFO] [stdout]    |
[INFO] [stdout] 48 |               4 => Ok(Self {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 49 | |                 t: ActionType::Toggle,
[INFO] [stdout] 50 | |                 from: words[1].parse().unwrap(),
[INFO] [stdout] 51 | |                 to: words[3].parse().unwrap(),
[INFO] [stdout] 52 | |             }),
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:50:23
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 from: words[1].parse().unwrap(),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 to: words[3].parse().unwrap(),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:53:18
[INFO] [stdout]    |
[INFO] [stdout] 53 |               5 => Ok(Self {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 54 | |                 t: words[1].parse().unwrap(),
[INFO] [stdout] 55 | |                 from: words[2].parse().unwrap(),
[INFO] [stdout] 56 | |                 to: words[4].parse().unwrap(),
[INFO] [stdout] 57 | |             }),
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ActionType, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:54:20
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 t: words[1].parse().unwrap(),
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:55:23
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 from: words[2].parse().unwrap(),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Pos, Infallible>
[INFO] [stdout]   --> src/bin/06.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 to: words[4].parse().unwrap(),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]    --> src/bin/06.rs:165:44
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let actions = input.lines().map(|line| line.parse::<Action>().unwrap());
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Action, Infallible>
[INFO] [stdout]    --> src/bin/06.rs:175:44
[INFO] [stdout]     |
[INFO] [stdout] 175 |     let actions = input.lines().map(|line| line.parse::<Action>().unwrap());
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advent_of_code` (bin "06" test) due to 17 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PresentBox, Infallible>
[INFO] [stdout]   --> src/bin/02.rs:12:53
[INFO] [stdout]    |
[INFO] [stdout] 12 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 13 | |         let mut dimensions = s.split('x').map(|s| s.parse::<u32>().unwrap());
[INFO] [stdout] 14 | |
[INFO] [stdout] 15 | |         Ok(Self {
[INFO] [stdout] ...  |
[INFO] [stdout] 19 | |         })
[INFO] [stdout] 20 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PresentBox, Infallible>
[INFO] [stdout]   --> src/bin/02.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | /         Ok(Self {
[INFO] [stdout] 16 | |             l: dimensions.next().unwrap(),
[INFO] [stdout] 17 | |             w: dimensions.next().unwrap(),
[INFO] [stdout] 18 | |             h: dimensions.next().unwrap(),
[INFO] [stdout] 19 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PresentBox, Infallible>
[INFO] [stdout]   --> src/bin/02.rs:47:31
[INFO] [stdout]    |
[INFO] [stdout] 47 |             let present_box = line.parse::<PresentBox>().unwrap();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PresentBox, Infallible>
[INFO] [stdout]   --> src/bin/02.rs:59:31
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let present_box = line.parse::<PresentBox>().unwrap();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:22:53
[INFO] [stdout]    |
[INFO] [stdout] 22 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 23 | |         RE.captures(s)
[INFO] [stdout] 24 | |             .map(|c| {
[INFO] [stdout] 25 | |                 let (_, data) = c.extract();
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | |             .unwrap()
[INFO] [stdout] 30 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         RE.captures(s)
[INFO] [stdout] 24 | |             .map(|c| {
[INFO] [stdout] 25 | |                 let (_, data) = c.extract();
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |             })
[INFO] [stdout] 29 | |             .unwrap()
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |               .map(|c| {
[INFO] [stdout]    |  ______________________^
[INFO] [stdout] 25 | |                 let (_, data) = c.extract();
[INFO] [stdout] 26 | |
[INFO] [stdout] 27 | |                 Ok(Self(data.map(|n| n.parse::<i64>().unwrap())))
[INFO] [stdout] 28 | |             })
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 Ok(Self(data.map(|n| n.parse::<i64>().unwrap())))
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:56:18
[INFO] [stdout]    |
[INFO] [stdout] 56 |         .map(|l| l.parse::<Ingredient>().unwrap())
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Ingredient, Infallible>
[INFO] [stdout]   --> src/bin/15.rs:75:18
[INFO] [stdout]    |
[INFO] [stdout] 75 |         .map(|l| l.parse::<Ingredient>().unwrap())
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advent_of_code` (bin "02" test) due to 4 previous errors
[INFO] [stderr] error: could not compile `advent_of_code` (bin "15" test) due to 6 previous errors
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/bin/13.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn get_data(input: &str) -> (Names, Connections) {
[INFO] [stdout]   |                    ^^^^      ^^^^^  ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                    |         |
[INFO] [stdout]   |                    |         the same lifetime is hidden here
[INFO] [stdout]   |                    the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn get_data(input: &str) -> (Names<'_>, Connections<'_>) {
[INFO] [stdout]   |                                   ++++             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/bin/13.rs:18:28
[INFO] [stdout]    |
[INFO] [stdout] 18 |             names.insert(to.clone());
[INFO] [stdout]    |                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8117a9dad0f825e963260ba6988945b12d7551407fb9f4b9c3724e24129120ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8117a9dad0f825e963260ba6988945b12d7551407fb9f4b9c3724e24129120ba", kill_on_drop: false }`
[INFO] [stdout] 8117a9dad0f825e963260ba6988945b12d7551407fb9f4b9c3724e24129120ba