[INFO] cloning repository https://github.com/GregorLohaus/retint
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GregorLohaus/retint" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGregorLohaus%2Fretint", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGregorLohaus%2Fretint'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fd2857c2591e5cbd996dcd2b2a783d2d4f9d5452
[INFO] checking GregorLohaus/retint against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGregorLohaus%2Fretint" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/GregorLohaus/retint
[INFO] finished tweaking git repo https://github.com/GregorLohaus/retint
[INFO] tweaked toml for git repo https://github.com/GregorLohaus/retint written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/GregorLohaus/retint 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/GregorLohaus/retint 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nalgebra-macros v0.2.0
[INFO] [stderr]   Downloaded arr_macro_impl v0.2.1
[INFO] [stderr]   Downloaded memory-stats v1.1.0
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[INFO] [stderr]   Downloaded nalgebra v0.32.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9ea4ee0b1f1031faa7082a139b0536a3c3316df2812dfcec31ad5c98b050716b
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[INFO] running `Command { std: "docker" "rm" "-f" "9ea4ee0b1f1031faa7082a139b0536a3c3316df2812dfcec31ad5c98b050716b", kill_on_drop: false }`
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[INFO] [stdout] e26cf5af7870c9adf00f8b4344da012842c281c603b94b24fa6510970856de90
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[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling paste v1.0.12
[INFO] [stderr]    Compiling signal-hook v0.3.15
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]     Checking lock_api v0.4.10
[INFO] [stderr]     Checking safe_arch v0.7.0
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]     Checking wide v0.7.10
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking parking_lot_core v0.9.8
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]     Checking signal-hook-mio v0.2.3
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[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking simba v0.8.1
[INFO] [stderr]    Compiling arr_macro_impl v0.2.1
[INFO] [stderr]    Compiling nalgebra-macros v0.2.0
[INFO] [stderr]     Checking arr_macro v0.2.1
[INFO] [stderr]     Checking nalgebra v0.32.2
[INFO] [stderr]     Checking retint v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `panic`
[INFO] [stdout]  --> src/gamestate.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt, panic};
[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 imports: `error::Error` and `io::stdout`
[INFO] [stdout]  --> src/mutator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 4 |     io::stdout,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/renderer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ExecutableCommand`
[INFO] [stdout]  --> src/renderer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ExecutableCommand, QueueableCommand, Result,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error::Error`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExecutableCommand` and `MoveTo`
[INFO] [stdout]   --> src/main.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 14 |     cursor::{Hide, MoveTo, Show},
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     ExecutableCommand, QueueableCommand,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `panic`
[INFO] [stdout]  --> src/gamestate.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt, panic};
[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 imports: `error::Error` and `io::stdout`
[INFO] [stdout]  --> src/mutator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 4 |     io::stdout,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/renderer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ExecutableCommand`
[INFO] [stdout]  --> src/renderer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ExecutableCommand, QueueableCommand, Result,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error::Error`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExecutableCommand` and `MoveTo`
[INFO] [stdout]   --> src/main.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 14 |     cursor::{Hide, MoveTo, Show},
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     ExecutableCommand, QueueableCommand,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/gamestate.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |         if let Some(ref mut t) = &mut self.active_tetromino {
[INFO] [stdout]     |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/gamestate.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |         if let Some(ref mut t) = &mut self.active_tetromino {
[INFO] [stdout]     |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]  --> src/mutator.rs:8:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn mutate(state: &mut State, elapsed: Duration) {
[INFO] [stdout]   |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_fps` is never read
[INFO] [stdout]   --> src/main.rs:54:32
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut current_fps: u64 = 0;
[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: multiple fields are never read
[INFO] [stdout]   --> src/gamestate.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct State {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub auto_repeat_rate: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub delayed_auto_shit: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     pub soft_drop_step_time: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 52 |     pub last_soft_drop_activation: Option<Instant>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 53 |     pub soft_drop_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 54 |     pub last_move_left_activation: Option<Instant>,
[INFO] [stdout] 55 |     pub move_left_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 56 |     pub last_move_right_activation: Option<Instant>,
[INFO] [stdout] 57 |     pub move_right_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 58 |     pub active_tetromino: Option<Tetromino>,
[INFO] [stdout] 59 |     pub held_tetromino: Option<Tetromino>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 60 |     pub tetromino_x_log: Vec<usize>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_blink_demo` is never used
[INFO] [stdout]   --> src/renderer.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn draw_blink_demo(stdout: &mut Stdout) -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_x` and `set_y` are never used
[INFO] [stdout]   --> src/tetrominos.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Block {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 12 |     pub fn set_x(&mut self, x:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn set_y(&mut self, y:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tetromino_type` is never read
[INFO] [stdout]   --> src/tetrominos.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Tetromino {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 39 |     pub tetromino_type: TetrominoType,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `I`, `T`, `L`, `S`, and `Z` are never constructed
[INFO] [stdout]   --> src/tetrominos.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub enum TetrominoType {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 48 |     I,
[INFO] [stdout]    |     ^
[INFO] [stdout] 49 |     T,
[INFO] [stdout]    |     ^
[INFO] [stdout] 50 |     J,
[INFO] [stdout] 51 |     L,
[INFO] [stdout]    |     ^
[INFO] [stdout] 52 |     S,
[INFO] [stdout]    |     ^
[INFO] [stdout] 53 |     Z,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TetrominoType` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_y` and `max_y` are never used
[INFO] [stdout]   --> src/tetrominos.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl Tetromino {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn set_y(&mut self, y:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     pub fn max_y(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     stdout.queue(Clear(ClearType::All));
[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] 55 |     let _ = stdout.queue(Clear(ClearType::All));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/renderer.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         stdout.queue(Print(yindex));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let _ = stdout.queue(Print(yindex));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/gamestate.rs:143:21
[INFO] [stdout]     |
[INFO] [stdout] 143 |         if let Some(ref mut t) = &mut self.active_tetromino {
[INFO] [stdout]     |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/gamestate.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |         if let Some(ref mut t) = &mut self.active_tetromino {
[INFO] [stdout]     |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elapsed`
[INFO] [stdout]  --> src/mutator.rs:8:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn mutate(state: &mut State, elapsed: Duration) {
[INFO] [stdout]   |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_elapsed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_fps` is never read
[INFO] [stdout]   --> src/main.rs:54:32
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut current_fps: u64 = 0;
[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: multiple fields are never read
[INFO] [stdout]   --> src/gamestate.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct State {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub auto_repeat_rate: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub delayed_auto_shit: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     pub soft_drop_step_time: Duration,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 52 |     pub last_soft_drop_activation: Option<Instant>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 53 |     pub soft_drop_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 54 |     pub last_move_left_activation: Option<Instant>,
[INFO] [stdout] 55 |     pub move_left_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 56 |     pub last_move_right_activation: Option<Instant>,
[INFO] [stdout] 57 |     pub move_right_active: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 58 |     pub active_tetromino: Option<Tetromino>,
[INFO] [stdout] 59 |     pub held_tetromino: Option<Tetromino>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 60 |     pub tetromino_x_log: Vec<usize>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_blink_demo` is never used
[INFO] [stdout]   --> src/renderer.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn draw_blink_demo(stdout: &mut Stdout) -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_x` and `set_y` are never used
[INFO] [stdout]   --> src/tetrominos.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Block {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 12 |     pub fn set_x(&mut self, x:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn set_y(&mut self, y:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tetromino_type` is never read
[INFO] [stdout]   --> src/tetrominos.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Tetromino {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 39 |     pub tetromino_type: TetrominoType,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `I`, `T`, `L`, `S`, and `Z` are never constructed
[INFO] [stdout]   --> src/tetrominos.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub enum TetrominoType {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 48 |     I,
[INFO] [stdout]    |     ^
[INFO] [stdout] 49 |     T,
[INFO] [stdout]    |     ^
[INFO] [stdout] 50 |     J,
[INFO] [stdout] 51 |     L,
[INFO] [stdout]    |     ^
[INFO] [stdout] 52 |     S,
[INFO] [stdout]    |     ^
[INFO] [stdout] 53 |     Z,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TetrominoType` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_y` and `max_y` are never used
[INFO] [stdout]   --> src/tetrominos.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl Tetromino {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn set_y(&mut self, y:usize) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     pub fn max_y(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     stdout.queue(Clear(ClearType::All));
[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] 55 |     let _ = stdout.queue(Clear(ClearType::All));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/renderer.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         stdout.queue(Print(yindex));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let _ = stdout.queue(Print(yindex));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.34s
[INFO] running `Command { std: "docker" "inspect" "e26cf5af7870c9adf00f8b4344da012842c281c603b94b24fa6510970856de90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e26cf5af7870c9adf00f8b4344da012842c281c603b94b24fa6510970856de90", kill_on_drop: false }`
[INFO] [stdout] e26cf5af7870c9adf00f8b4344da012842c281c603b94b24fa6510970856de90
