[INFO] cloning repository https://github.com/richardautry/card_command
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/richardautry/card_command" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichardautry%2Fcard_command", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichardautry%2Fcard_command'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69bfa0077265b326dc8f91a14449794c2caf6692
[INFO] checking richardautry/card_command against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichardautry%2Fcard_command" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/richardautry/card_command
[INFO] finished tweaking git repo https://github.com/richardautry/card_command
[INFO] tweaked toml for git repo https://github.com/richardautry/card_command written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/richardautry/card_command on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/richardautry/card_command 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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: binary `card_command` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /workspace/builds/worker-3-tc1/source/target/.../card_command
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `card-command`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 - name = "card_command"
[INFO] [stderr] 17 + name = "card-command"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `card-command`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:18:19
[INFO] [stderr]    |
[INFO] [stderr] 18 ~ version = "0.1.0"
[INFO] [stderr] 19 + [[bin]]
[INFO] [stderr] 20 + name = "card-command"
[INFO] [stderr] 21 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `card_command` (manifest) generated 1 warning
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.15
[INFO] [stderr]   Downloaded serde_json v1.0.78
[INFO] [stderr]   Downloaded heck v0.4.0
[INFO] [stderr]   Downloaded ctrlc v3.2.1
[INFO] [stderr]   Downloaded itoa v1.0.1
[INFO] [stderr]   Downloaded termcolor v1.1.2
[INFO] [stderr]   Downloaded os_str_bytes v6.0.0
[INFO] [stderr]   Downloaded clap_derive v3.0.12
[INFO] [stderr]   Downloaded serde_derive v1.0.136
[INFO] [stderr]   Downloaded ryu v1.0.9
[INFO] [stderr]   Downloaded proc-macro2 v1.0.36
[INFO] [stderr]   Downloaded anyhow v1.0.53
[INFO] [stderr]   Downloaded serde v1.0.136
[INFO] [stderr]   Downloaded cc v1.0.72
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.7
[INFO] [stderr]   Downloaded textwrap v0.14.2
[INFO] [stderr]   Downloaded indexmap v1.8.0
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.2
[INFO] [stderr]   Downloaded clap v3.0.13
[INFO] [stderr]   Downloaded syn v1.0.86
[INFO] [stderr]   Downloaded nix v0.23.1
[INFO] [stderr]   Downloaded libc v0.2.116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f
[INFO] running `Command { std: "docker" "start" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: binary `card_command` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /opt/rustwide/target/.../card_command
[INFO] [stderr]    |                          ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `card-command`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 - name = "card_command"
[INFO] [stderr] 17 + name = "card-command"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `card-command`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:18:19
[INFO] [stderr]    |
[INFO] [stderr] 18 ~ version = "0.1.0"
[INFO] [stderr] 19 + [[bin]]
[INFO] [stderr] 20 + name = "card-command"
[INFO] [stderr] 21 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `card_command` (manifest) generated 1 warning
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.116
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling clap_derive v3.0.12
[INFO] [stderr]     Checking ctrlc v3.2.1
[INFO] [stderr]     Checking clap v3.0.13
[INFO] [stderr]     Checking card_command v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serde::de::value::CharDeserializer`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::de::value::CharDeserializer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::char::ParseCharError`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::char::ParseCharError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::ParseError`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::string::ParseError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Context`
[INFO] [stdout]  --> src/main.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 | use anyhow::{Context, Result, Error, anyhow};
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc::channel`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::sync::mpsc::channel;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::de::value::CharDeserializer`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::de::value::CharDeserializer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::char::ParseCharError`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::char::ParseCharError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::num::ParseIntError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::ParseError`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::string::ParseError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Context`
[INFO] [stdout]  --> src/main.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 | use anyhow::{Context, Result, Error, anyhow};
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc::channel`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::sync::mpsc::channel;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/main.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{prelude::*, BufReader};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `column_index` is never read
[INFO] [stdout]    --> src/main.rs:116:28
[INFO] [stdout]     |
[INFO] [stdout] 116 |     let mut column_index = 0;
[INFO] [stdout]     |                            ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 121 |         column_index = column_ascii - 97;
[INFO] [stdout]     |         -------------------------------- `column_index` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `selected_coordinates`
[INFO] [stdout]    --> src/main.rs:226:13
[INFO] [stdout]     |
[INFO] [stdout] 226 |         let mut selected_coordinates:Coordinates;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_selected_coordinates`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `selected_char`
[INFO] [stdout]    --> src/main.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |         let mut selected_char: Character;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_selected_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `def`, and `att` are never read
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Character {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 20 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     display_char: String,
[INFO] [stdout] 22 |     def: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 23 |     att: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ColumnIndexError` is never constructed
[INFO] [stdout]    --> src/main.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 114 |     struct ColumnIndexError;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 move_character(&commands[0], &commands[2], &mut spaces_array, &empty_space);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 let _ = move_character(&commands[0], &commands[2], &mut spaces_array, &empty_space);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `prelude`
[INFO] [stdout]  --> src/main.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{prelude::*, BufReader};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `column_index` is never read
[INFO] [stdout]    --> src/main.rs:116:28
[INFO] [stdout]     |
[INFO] [stdout] 116 |     let mut column_index = 0;
[INFO] [stdout]     |                            ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 121 |         column_index = column_ascii - 97;
[INFO] [stdout]     |         -------------------------------- `column_index` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `selected_coordinates`
[INFO] [stdout]    --> src/main.rs:226:13
[INFO] [stdout]     |
[INFO] [stdout] 226 |         let mut selected_coordinates:Coordinates;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_selected_coordinates`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `selected_char`
[INFO] [stdout]    --> src/main.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |         let mut selected_char: Character;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_selected_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `def`, and `att` are never read
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Character {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 20 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     display_char: String,
[INFO] [stdout] 22 |     def: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 23 |     att: u32,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ColumnIndexError` is never constructed
[INFO] [stdout]    --> src/main.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 114 |     struct ColumnIndexError;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 move_character(&commands[0], &commands[2], &mut spaces_array, &empty_space);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 let _ = move_character(&commands[0], &commands[2], &mut spaces_array, &empty_space);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `clap`
[INFO] [stderr]  --> Cargo.toml:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | [dependencies.clap]
[INFO] [stderr]   |               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `clap`
[INFO] [stderr] warning: `card_command` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.81s
[INFO] running `Command { std: "docker" "inspect" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f", kill_on_drop: false }`
[INFO] [stdout] 537841adae5b89656e1b1d4e95f989cc4aaf415f9d61126903c4c602ce10c54f
