[INFO] cloning repository https://github.com/LaurentErreca/adventofcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LaurentErreca/adventofcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentErreca%2Fadventofcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentErreca%2Fadventofcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70ddde72ae5c570f95163848d6bea66c21bf34da
[INFO] checking LaurentErreca/adventofcode against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaurentErreca%2Fadventofcode" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LaurentErreca/adventofcode
[INFO] finished tweaking git repo https://github.com/LaurentErreca/adventofcode
[INFO] tweaked toml for git repo https://github.com/LaurentErreca/adventofcode written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LaurentErreca/adventofcode on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LaurentErreca/adventofcode 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded os_str_bytes v4.2.0
[INFO] [stderr]   Downloaded textwrap v0.14.2
[INFO] [stderr]   Downloaded curl v0.4.43
[INFO] [stderr]   Downloaded clap v3.0.0-beta.5
[INFO] [stderr]   Downloaded curl-sys v0.4.55+curl-7.83.1
[INFO] [stderr]   Downloaded clap_derive v3.0.0-beta.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7f9cd5926fbd27066385265c8ee5038d244693188b86e5d654735731bd2d6c6
[INFO] running `Command { std: "docker" "start" "-a" "c7f9cd5926fbd27066385265c8ee5038d244693188b86e5d654735731bd2d6c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7f9cd5926fbd27066385265c8ee5038d244693188b86e5d654735731bd2d6c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7f9cd5926fbd27066385265c8ee5038d244693188b86e5d654735731bd2d6c6", kill_on_drop: false }`
[INFO] [stdout] c7f9cd5926fbd27066385265c8ee5038d244693188b86e5d654735731bd2d6c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a814eb2936b7fdf10c2c89d3fdd475c86084083a3e065040ea0257113406809d
[INFO] running `Command { std: "docker" "start" "-a" "a814eb2936b7fdf10c2c89d3fdd475c86084083a3e065040ea0257113406809d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling libz-sys v1.1.8
[INFO] [stderr]    Compiling openssl-sys v0.9.74
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling curl-sys v0.4.55+curl-7.83.1
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]    Compiling curl v0.4.43
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking os_str_bytes v4.2.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking indexmap v1.9.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.5
[INFO] [stderr]     Checking clap v3.0.0-beta.5
[INFO] [stderr]     Checking avent2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:87:23
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let mut a: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:88:23
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let mut b: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `c` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:89:23
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let mut c: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `d` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:90:23
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let mut d: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `e` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:91:23
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut e: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `f` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:92:23
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let mut f: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `zero` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:94:26
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let mut zero: &str = "";
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `two` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:96:25
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let mut two: &str = "";
[INFO] [stdout]    |                         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `five` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:99:26
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut five: &str = "";
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `six` is never read
[INFO] [stdout]    --> src/solutions/day8.rs:100:25
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let mut six: &str = "";
[INFO] [stdout]     |                         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `nine` is never read
[INFO] [stdout]    --> src/solutions/day8.rs:103:26
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let mut nine: &str = "";
[INFO] [stdout]     |                          ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solutions/day9.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let mut start_position: usize = indexes[idx];
[INFO] [stdout]    |             ----^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/solutions/day9.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let result: u32 = indexes.iter().map(|x| data[*x]+1).sum::<u32>();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> src/solutions/day9.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let idx: usize = 3;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/solutions/day9.rs:112:10
[INFO] [stdout]     |
[INFO] [stdout] 112 |     for (key, value) in &basins {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nb_row`
[INFO] [stdout]   --> src/solutions/day11.rs:15:87
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn increment_data_at_position(data: &mut Vec<u32>, x: usize, y: usize, nb_col: usize, nb_row: usize) -> () {
[INFO] [stdout]    |                                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nb_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:109:40
[INFO] [stdout]     |
[INFO] [stdout] 109 |         if code.len() == 2 { one = code.clone(); /* println!("one : {:?}", one); */ }
[INFO] [stdout]     |                                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:110:41
[INFO] [stdout]     |
[INFO] [stdout] 110 |         if code.len() == 4 { four = code.clone(); /* println!("four : {:?}", four); */ }
[INFO] [stdout]     |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:111:42
[INFO] [stdout]     |
[INFO] [stdout] 111 |         if code.len() == 3 { seven = code.clone(); /* println!("seven : {:?}", seven); */ }
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:112:42
[INFO] [stdout]     |
[INFO] [stdout] 112 |         if code.len() == 7 { eight = code.clone(); /* println!("eight : {:?}", eight); */ }
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:87:23
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let mut a: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:88:23
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let mut b: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `c` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:89:23
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let mut c: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `d` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:90:23
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let mut d: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `e` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:91:23
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut e: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `f` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:92:23
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let mut f: char = 'x';
[INFO] [stdout]    |                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `zero` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:94:26
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let mut zero: &str = "";
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `two` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:96:25
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let mut two: &str = "";
[INFO] [stdout]    |                         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `five` is never read
[INFO] [stdout]   --> src/solutions/day8.rs:99:26
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut five: &str = "";
[INFO] [stdout]    |                          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `six` is never read
[INFO] [stdout]    --> src/solutions/day8.rs:100:25
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let mut six: &str = "";
[INFO] [stdout]     |                         ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `nine` is never read
[INFO] [stdout]    --> src/solutions/day8.rs:103:26
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let mut nine: &str = "";
[INFO] [stdout]     |                          ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solutions/day9.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let mut start_position: usize = indexes[idx];
[INFO] [stdout]    |             ----^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/solutions/day9.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let result: u32 = indexes.iter().map(|x| data[*x]+1).sum::<u32>();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> src/solutions/day9.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let idx: usize = 3;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/solutions/day9.rs:112:10
[INFO] [stdout]     |
[INFO] [stdout] 112 |     for (key, value) in &basins {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nb_row`
[INFO] [stdout]   --> src/solutions/day11.rs:15:87
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn increment_data_at_position(data: &mut Vec<u32>, x: usize, y: usize, nb_col: usize, nb_row: usize) -> () {
[INFO] [stdout]    |                                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nb_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:109:40
[INFO] [stdout]     |
[INFO] [stdout] 109 |         if code.len() == 2 { one = code.clone(); /* println!("one : {:?}", one); */ }
[INFO] [stdout]     |                                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:110:41
[INFO] [stdout]     |
[INFO] [stdout] 110 |         if code.len() == 4 { four = code.clone(); /* println!("four : {:?}", four); */ }
[INFO] [stdout]     |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:111:42
[INFO] [stdout]     |
[INFO] [stdout] 111 |         if code.len() == 3 { seven = code.clone(); /* println!("seven : {:?}", seven); */ }
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> src/solutions/day8.rs:112:42
[INFO] [stdout]     |
[INFO] [stdout] 112 |         if code.len() == 7 { eight = code.clone(); /* println!("eight : {:?}", eight); */ }
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.96s
[INFO] running `Command { std: "docker" "inspect" "a814eb2936b7fdf10c2c89d3fdd475c86084083a3e065040ea0257113406809d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a814eb2936b7fdf10c2c89d3fdd475c86084083a3e065040ea0257113406809d", kill_on_drop: false }`
[INFO] [stdout] a814eb2936b7fdf10c2c89d3fdd475c86084083a3e065040ea0257113406809d
