[INFO] cloning repository https://github.com/Darkskald/launchpad_mini_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Darkskald/launchpad_mini_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarkskald%2Flaunchpad_mini_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarkskald%2Flaunchpad_mini_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90bf6c8a30635bf55d8fe1b8471cfbee03c1827e
[INFO] checking Darkskald/launchpad_mini_playground against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarkskald%2Flaunchpad_mini_playground" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Darkskald/launchpad_mini_playground on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Darkskald/launchpad_mini_playground
[INFO] finished tweaking git repo https://github.com/Darkskald/launchpad_mini_playground
[INFO] tweaked toml for git repo https://github.com/Darkskald/launchpad_mini_playground written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Darkskald/launchpad_mini_playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded coremidi v0.4.0
[INFO] [stderr]   Downloaded midir v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2013931c02ef3a47e79bfdf116e9676cebee31931dfe360f490177703b8ea585
[INFO] running `Command { std: "docker" "start" "-a" "2013931c02ef3a47e79bfdf116e9676cebee31931dfe360f490177703b8ea585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2013931c02ef3a47e79bfdf116e9676cebee31931dfe360f490177703b8ea585", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2013931c02ef3a47e79bfdf116e9676cebee31931dfe360f490177703b8ea585", kill_on_drop: false }`
[INFO] [stdout] 2013931c02ef3a47e79bfdf116e9676cebee31931dfe360f490177703b8ea585
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d2c0a18d6d025e6b13cb0d6b195c0b60a20f23b4c5847761b6c1769c9cf7bb5
[INFO] running `Command { std: "docker" "start" "-a" "7d2c0a18d6d025e6b13cb0d6b195c0b60a20f23b4c5847761b6c1769c9cf7bb5", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking memalloc v0.1.0
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]     Checking alsa v0.4.3
[INFO] [stderr]     Checking midir v0.7.0
[INFO] [stderr]     Checking launchpad_mini v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/main.rs (4 fixes)
[INFO] [stderr]        Fixed src/launchpad.rs (2 fixes)
[INFO] [stdout] warning: constant is never used: `NOTE_ON_MSG`
[INFO] [stdout]  --> src/launchpad.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const NOTE_ON_MSG: u8 = 0x90;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_OFF_MSG`
[INFO] [stdout]  --> src/launchpad.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOTE_OFF_MSG: u8 = 0x80;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DOUBLE_BUFFERING`
[INFO] [stdout]  --> src/launchpad.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const DOUBLE_BUFFERING: u8 = 0xB0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LedColor`
[INFO] [stdout]  --> src/launchpad.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct LedColor {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/launchpad.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(red: u8, green: u8) -> LedColor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hex_data`
[INFO] [stdout]   --> src/launchpad.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn get_hex_data(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `conn`
[INFO] [stdout]   --> src/launchpad.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     conn: MidiOutputConnection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flash_state`
[INFO] [stdout]   --> src/launchpad.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     flash_state: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `keys_as_vec`
[INFO] [stdout]   --> src/launchpad.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn keys_as_vec() -> Vec<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer_msg`
[INFO] [stdout]   --> src/launchpad.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn buffer_msg(&mut self, key: u8, data: u8) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `led_on_msg`
[INFO] [stdout]   --> src/launchpad.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn led_on_msg(&mut self, key: u8, color: LedColor) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_color`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn get_color(color: (u8, u8)) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_ON_MSG`
[INFO] [stdout]  --> src/launchpad.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const NOTE_ON_MSG: u8 = 0x90;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_OFF_MSG`
[INFO] [stdout]  --> src/launchpad.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOTE_OFF_MSG: u8 = 0x80;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DOUBLE_BUFFERING`
[INFO] [stdout]  --> src/launchpad.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const DOUBLE_BUFFERING: u8 = 0xB0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LedColor`
[INFO] [stdout]  --> src/launchpad.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct LedColor {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/launchpad.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(red: u8, green: u8) -> LedColor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hex_data`
[INFO] [stdout]   --> src/launchpad.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn get_hex_data(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `conn`
[INFO] [stdout]   --> src/launchpad.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     conn: MidiOutputConnection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flash_state`
[INFO] [stdout]   --> src/launchpad.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     flash_state: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `keys_as_vec`
[INFO] [stdout]   --> src/launchpad.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn keys_as_vec() -> Vec<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer_msg`
[INFO] [stdout]   --> src/launchpad.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn buffer_msg(&mut self, key: u8, data: u8) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `led_on_msg`
[INFO] [stdout]   --> src/launchpad.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn led_on_msg(&mut self, key: u8, color: LedColor) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_color`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn get_color(color: (u8, u8)) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         self.conn.send(&[DOUBLE_BUFFERING, key, data]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.conn.send(&[NOTE_ON_MSG, key, color.get_hex_data()]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         self.conn.send(&[DOUBLE_BUFFERING, key, data]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.conn.send(&[NOTE_ON_MSG, key, color.get_hex_data()]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.43s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking launchpad_mini v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: constant is never used: `NOTE_ON_MSG`
[INFO] [stdout]  --> src/launchpad.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const NOTE_ON_MSG: u8 = 0x90;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_OFF_MSG`
[INFO] [stdout]  --> src/launchpad.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOTE_OFF_MSG: u8 = 0x80;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DOUBLE_BUFFERING`
[INFO] [stdout]  --> src/launchpad.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const DOUBLE_BUFFERING: u8 = 0xB0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LedColor`
[INFO] [stdout]  --> src/launchpad.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct LedColor {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/launchpad.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(red: u8, green: u8) -> LedColor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hex_data`
[INFO] [stdout]   --> src/launchpad.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn get_hex_data(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `conn`
[INFO] [stdout]   --> src/launchpad.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     conn: MidiOutputConnection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flash_state`
[INFO] [stdout]   --> src/launchpad.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     flash_state: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `keys_as_vec`
[INFO] [stdout]   --> src/launchpad.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn keys_as_vec() -> Vec<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer_msg`
[INFO] [stdout]   --> src/launchpad.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn buffer_msg(&mut self, key: u8, data: u8) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `led_on_msg`
[INFO] [stdout]   --> src/launchpad.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn led_on_msg(&mut self, key: u8, color: LedColor) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_color`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn get_color(color: (u8, u8)) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_ON_MSG`
[INFO] [stdout]  --> src/launchpad.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const NOTE_ON_MSG: u8 = 0x90;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NOTE_OFF_MSG`
[INFO] [stdout]  --> src/launchpad.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOTE_OFF_MSG: u8 = 0x80;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `DOUBLE_BUFFERING`
[INFO] [stdout]  --> src/launchpad.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const DOUBLE_BUFFERING: u8 = 0xB0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LedColor`
[INFO] [stdout]  --> src/launchpad.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct LedColor {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/launchpad.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(red: u8, green: u8) -> LedColor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hex_data`
[INFO] [stdout]   --> src/launchpad.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn get_hex_data(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `conn`
[INFO] [stdout]   --> src/launchpad.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     conn: MidiOutputConnection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flash_state`
[INFO] [stdout]   --> src/launchpad.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     flash_state: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `keys_as_vec`
[INFO] [stdout]   --> src/launchpad.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn keys_as_vec() -> Vec<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `buffer_msg`
[INFO] [stdout]   --> src/launchpad.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn buffer_msg(&mut self, key: u8, data: u8) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `led_on_msg`
[INFO] [stdout]   --> src/launchpad.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn led_on_msg(&mut self, key: u8, color: LedColor) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_color`
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn get_color(color: (u8, u8)) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         self.conn.send(&[DOUBLE_BUFFERING, key, data]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.conn.send(&[NOTE_ON_MSG, key, color.get_hex_data()]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         self.conn.send(&[DOUBLE_BUFFERING, key, data]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/launchpad.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         self.conn.send(&[NOTE_ON_MSG, key, color.get_hex_data()]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "7d2c0a18d6d025e6b13cb0d6b195c0b60a20f23b4c5847761b6c1769c9cf7bb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d2c0a18d6d025e6b13cb0d6b195c0b60a20f23b4c5847761b6c1769c9cf7bb5", kill_on_drop: false }`
[INFO] [stdout] 7d2c0a18d6d025e6b13cb0d6b195c0b60a20f23b4c5847761b6c1769c9cf7bb5