[INFO] cloning repository https://github.com/peter-lucia/tetris_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peter-lucia/tetris_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeter-lucia%2Ftetris_engine", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3aceb863fdc9bb9abed691ca52547d985416de0
[INFO] testing peter-lucia/tetris_engine against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeter-lucia%2Ftetris_engine" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/peter-lucia/tetris_engine
[INFO] finished tweaking git repo https://github.com/peter-lucia/tetris_engine
[INFO] tweaked toml for git repo https://github.com/peter-lucia/tetris_engine written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/peter-lucia/tetris_engine on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/peter-lucia/tetris_engine 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34c183dc703085fa0306922876f3ff2e0c9376a689f702b86aab31b456e488a8
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[INFO] running `Command { std: "docker" "inspect" "34c183dc703085fa0306922876f3ff2e0c9376a689f702b86aab31b456e488a8", kill_on_drop: false }`
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[INFO] [stderr]    Compiling rand_core v0.9.5
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[INFO] [stderr]    Compiling chrono v0.4.43
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[INFO] [stderr]    Compiling pyo3-macros-backend v0.27.2
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[INFO] [stderr]    Compiling env_filter v0.1.4
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[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling derive_more-impl v2.1.1
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[INFO] [stderr]    Compiling derive_more v2.1.1
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[INFO] [stderr]    Compiling tetris_engine_backend v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `BorrowMut` and `Borrow`
[INFO] [stdout]  --> src/main.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]    --> src/tetromino.rs:335:21
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]   --> src/well.rs:83:25
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]    --> src/tetromino.rs:335:21
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]   --> src/well.rs:83:25
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/tetromino.rs:335:34
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/well.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     match rng.gen_range(0..4) {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/well.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut tetris = Tetris::new();
[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: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/tetromino.rs:335:34
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/well.rs:237:38
[INFO] [stdout]     |
[INFO] [stdout] 237 |     fn render_game_status(&mut self, status: &str) {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/well.rs:240:32
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn render_score(&mut self, score: i32) {
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/well.rs:287:21
[INFO] [stdout]     |
[INFO] [stdout] 287 |                 for x in 1..self.grid[y].len()-1 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/well.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     match rng.gen_range(0..4) {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_alt` is never used
[INFO] [stdout]    --> src/tetromino.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn rotate_alt(t: &mut Tetromino) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TetrominoT` is never used
[INFO] [stdout]    --> src/tetromino.rs:277:11
[INFO] [stdout]     |
[INFO] [stdout] 277 | pub trait TetrominoT {
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Up` is never constructed
[INFO] [stdout]   --> src/well.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 76 |     Up,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_direction` is never used
[INFO] [stdout]   --> src/well.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn random_direction() -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run_game` is never used
[INFO] [stdout]    --> src/well.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub trait Tetris {
[INFO] [stdout]     |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn run_game(&mut self) -> ();
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/well.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[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] 35 |     let _ = mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/well.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 372 |         fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[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] 372 |         let _ = fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/well.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut tetris = Tetris::new();
[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: `status`
[INFO] [stdout]    --> src/well.rs:237:38
[INFO] [stdout]     |
[INFO] [stdout] 237 |     fn render_game_status(&mut self, status: &str) {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/well.rs:240:32
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn render_score(&mut self, score: i32) {
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/well.rs:287:21
[INFO] [stdout]     |
[INFO] [stdout] 287 |                 for x in 1..self.grid[y].len()-1 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_alt` is never used
[INFO] [stdout]    --> src/tetromino.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn rotate_alt(t: &mut Tetromino) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TetrominoT` is never used
[INFO] [stdout]    --> src/tetromino.rs:277:11
[INFO] [stdout]     |
[INFO] [stdout] 277 | pub trait TetrominoT {
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_game` is never used
[INFO] [stdout]   --> src/well.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn read_game() -> Well {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_game` is never used
[INFO] [stdout]   --> src/well.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn write_game(_well: Well) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start_game_multithreaded` is never used
[INFO] [stdout]   --> src/well.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn start_game_multithreaded() -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Up` is never constructed
[INFO] [stdout]   --> src/well.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 76 |     Up,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_direction` is never used
[INFO] [stdout]   --> src/well.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn random_direction() -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/well.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[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] 35 |     let _ = mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/well.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 372 |         fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[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] 372 |         let _ = fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.41s
[INFO] running `Command { std: "docker" "inspect" "ca8a62b7c3a61bbec64c86a15cf19adb6bebba0d27a4c9757532a49febaa3629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca8a62b7c3a61bbec64c86a15cf19adb6bebba0d27a4c9757532a49febaa3629", kill_on_drop: false }`
[INFO] [stdout] ca8a62b7c3a61bbec64c86a15cf19adb6bebba0d27a4c9757532a49febaa3629
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3a6cc36d03160da0c1cc880cb03ddf0ba5efb0b178391dbabf9167da169a3ca
[INFO] running `Command { std: "docker" "start" "-a" "d3a6cc36d03160da0c1cc880cb03ddf0ba5efb0b178391dbabf9167da169a3ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling tetris_engine_backend v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]    --> src/tetromino.rs:335:21
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]   --> src/well.rs:83:25
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/tetromino.rs:335:34
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/well.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     match rng.gen_range(0..4) {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/well.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut tetris = Tetris::new();
[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: `status`
[INFO] [stdout]    --> src/well.rs:237:38
[INFO] [stdout]     |
[INFO] [stdout] 237 |     fn render_game_status(&mut self, status: &str) {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/well.rs:240:32
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn render_score(&mut self, score: i32) {
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/well.rs:287:21
[INFO] [stdout]     |
[INFO] [stdout] 287 |                 for x in 1..self.grid[y].len()-1 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_alt` is never used
[INFO] [stdout]    --> src/tetromino.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn rotate_alt(t: &mut Tetromino) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TetrominoT` is never used
[INFO] [stdout]    --> src/tetromino.rs:277:11
[INFO] [stdout]     |
[INFO] [stdout] 277 | pub trait TetrominoT {
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_rotate_90_basic` is never used
[INFO] [stdout]    --> src/tetromino.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn test_rotate_90_basic() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Up` is never constructed
[INFO] [stdout]   --> src/well.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 76 |     Up,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_direction` is never used
[INFO] [stdout]   --> src/well.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn random_direction() -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run_game` is never used
[INFO] [stdout]    --> src/well.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub trait Tetris {
[INFO] [stdout]     |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn run_game(&mut self) -> ();
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/well.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[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] 35 |     let _ = mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/well.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 372 |         fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[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] 372 |         let _ = fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BorrowMut` and `Borrow`
[INFO] [stdout]  --> src/main.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]    --> src/tetromino.rs:335:21
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stdout]   --> src/well.rs:83:25
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/tetromino.rs:335:34
[INFO] [stdout]     |
[INFO] [stdout] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]   --> src/well.rs:84:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     match rng.gen_range(0..4) {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/well.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut tetris = Tetris::new();
[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: `status`
[INFO] [stdout]    --> src/well.rs:237:38
[INFO] [stdout]     |
[INFO] [stdout] 237 |     fn render_game_status(&mut self, status: &str) {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]    --> src/well.rs:240:32
[INFO] [stdout]     |
[INFO] [stdout] 240 |     fn render_score(&mut self, score: i32) {
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/well.rs:287:21
[INFO] [stdout]     |
[INFO] [stdout] 287 |                 for x in 1..self.grid[y].len()-1 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rotate_alt` is never used
[INFO] [stdout]    --> src/tetromino.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn rotate_alt(t: &mut Tetromino) -> () {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TetrominoT` is never used
[INFO] [stdout]    --> src/tetromino.rs:277:11
[INFO] [stdout]     |
[INFO] [stdout] 277 | pub trait TetrominoT {
[INFO] [stdout]     |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_rotate_90_basic` is never used
[INFO] [stdout]    --> src/tetromino.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn test_rotate_90_basic() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_game` is never used
[INFO] [stdout]   --> src/well.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn read_game() -> Well {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_game` is never used
[INFO] [stdout]   --> src/well.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn write_game(_well: Well) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start_game_multithreaded` is never used
[INFO] [stdout]   --> src/well.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn start_game_multithreaded() -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Up` is never constructed
[INFO] [stdout]   --> src/well.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 76 |     Up,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_direction` is never used
[INFO] [stdout]   --> src/well.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn random_direction() -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/well.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[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] 35 |     let _ = mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/well.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 372 |         fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[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] 372 |         let _ = fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "d3a6cc36d03160da0c1cc880cb03ddf0ba5efb0b178391dbabf9167da169a3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3a6cc36d03160da0c1cc880cb03ddf0ba5efb0b178391dbabf9167da169a3ca", kill_on_drop: false }`
[INFO] [stdout] d3a6cc36d03160da0c1cc880cb03ddf0ba5efb0b178391dbabf9167da169a3ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b3dfd4ec6262bcb66afaa2f47810f67e28cd218bfbe316b9846d9d9a38b4dc2c
[INFO] running `Command { std: "docker" "start" "-a" "b3dfd4ec6262bcb66afaa2f47810f67e28cd218bfbe316b9846d9d9a38b4dc2c", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stderr]    --> src/tetromino.rs:335:21
[INFO] [stderr]     |
[INFO] [stderr] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stderr]     |                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `rand::thread_rng`: Renamed to `rng`
[INFO] [stderr]   --> src/well.rs:83:25
[INFO] [stderr]    |
[INFO] [stderr] 83 |     let mut rng = rand::thread_rng();
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/tetromino.rs:335:34
[INFO] [stderr]     |
[INFO] [stderr] 335 |     let num = rand::thread_rng().gen_range(0..4);
[INFO] [stderr]     |                                  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]   --> src/well.rs:84:15
[INFO] [stderr]    |
[INFO] [stderr] 84 |     match rng.gen_range(0..4) {
[INFO] [stderr]    |               ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/well.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut tetris = Tetris::new();
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]    --> src/well.rs:237:38
[INFO] [stderr]     |
[INFO] [stderr] 237 |     fn render_game_status(&mut self, status: &str) {
[INFO] [stderr]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `score`
[INFO] [stderr]    --> src/well.rs:240:32
[INFO] [stderr]     |
[INFO] [stderr] 240 |     fn render_score(&mut self, score: i32) {
[INFO] [stderr]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/well.rs:287:21
[INFO] [stderr]     |
[INFO] [stderr] 287 |                 for x in 1..self.grid[y].len()-1 {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: function `rotate_alt` is never used
[INFO] [stderr]    --> src/tetromino.rs:214:4
[INFO] [stderr]     |
[INFO] [stderr] 214 | fn rotate_alt(t: &mut Tetromino) -> () {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `TetrominoT` is never used
[INFO] [stderr]    --> src/tetromino.rs:277:11
[INFO] [stderr]     |
[INFO] [stderr] 277 | pub trait TetrominoT {
[INFO] [stderr]     |           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_rotate_90_basic` is never used
[INFO] [stderr]    --> src/tetromino.rs:368:8
[INFO] [stderr]     |
[INFO] [stderr] 368 |     fn test_rotate_90_basic() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Up` is never constructed
[INFO] [stderr]   --> src/well.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub enum Direction {
[INFO] [stderr]    |          --------- variant in this enum
[INFO] [stderr] 76 |     Up,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `random_direction` is never used
[INFO] [stderr]   --> src/well.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub fn random_direction() -> Direction {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `run_game` is never used
[INFO] [stderr]    --> src/well.rs:146:8
[INFO] [stderr]     |
[INFO] [stderr] 128 | pub trait Tetris {
[INFO] [stderr]     |           ------ method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 146 |     fn run_game(&mut self) -> ();
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/well.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let _ = mem::replace(&mut *hashmap_guard, _well.clone());
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/well.rs:372:9
[INFO] [stderr]     |
[INFO] [stderr] 372 |         fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 372 |         let _ = fs::write(HIGH_SCORE_FILENAME, high_score.to_string());
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BorrowMut` and `Borrow`
[INFO] [stderr]  --> src/main.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stderr]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_game` is never used
[INFO] [stderr]   --> src/well.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub fn read_game() -> Well {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `write_game` is never used
[INFO] [stderr]   --> src/well.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn write_game(_well: Well) -> () {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `start_game_multithreaded` is never used
[INFO] [stderr]   --> src/well.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub fn start_game_multithreaded() -> () {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `tetris_engine_backend` (lib test) generated 16 warnings (run `cargo fix --lib -p tetris_engine_backend --tests` to apply 4 suggestions)
[INFO] [stderr] warning: `tetris_engine_backend` (bin "tetris_engine_backend" test) generated 19 warnings (15 duplicates) (run `cargo fix --bin "tetris_engine_backend" -p tetris_engine_backend --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tetris_engine_backend-d19a957e5272c274)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tetromino::tests::test_min_max_xy ... ok
[INFO] [stdout] test tetromino::tests::test_rotate_full ... ok
[INFO] [stdout] test tetromino::tests::test_rotate_90_offset ... ok
[INFO] [stdout] test tetromino::tests::test_min_max_xy_2 ... ok
[INFO] [stdout] test tetromino::tests::test_rotate ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/tetris_engine_backend-5e5bb7c50e67b1d6)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tetromino::tests::test_min_max_xy ... ok
[INFO] [stdout] test tetromino::tests::test_min_max_xy_2 ... ok
[INFO] [stdout] test tetromino::tests::test_rotate ... ok
[INFO] [stdout] test tetromino::tests::test_rotate_90_offset ... ok
[INFO] [stdout] test tetromino::tests::test_rotate_full ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b3dfd4ec6262bcb66afaa2f47810f67e28cd218bfbe316b9846d9d9a38b4dc2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3dfd4ec6262bcb66afaa2f47810f67e28cd218bfbe316b9846d9d9a38b4dc2c", kill_on_drop: false }`
[INFO] [stdout] b3dfd4ec6262bcb66afaa2f47810f67e28cd218bfbe316b9846d9d9a38b4dc2c
