[INFO] updating cached repository cszatma/rust-tetris
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cszatma/rust-tetris
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cszatma/rust-tetris" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/cszatma/rust-tetris"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/cszatma/rust-tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cszatma/rust-tetris" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/cszatma/rust-tetris"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/cszatma/rust-tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0230613632e3388a3020ea59a950f294f8a67b32
[INFO] sha for GitHub repo cszatma/rust-tetris: 0230613632e3388a3020ea59a950f294f8a67b32
[INFO] validating manifest of cszatma/rust-tetris on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cszatma/rust-tetris on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cszatma/rust-tetris
[INFO] finished frobbing cszatma/rust-tetris
[INFO] frobbed toml for cszatma/rust-tetris written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/cszatma/rust-tetris/Cargo.toml
[INFO] started frobbing cszatma/rust-tetris
[INFO] finished frobbing cszatma/rust-tetris
[INFO] frobbed toml for cszatma/rust-tetris written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/cszatma/rust-tetris/Cargo.toml
[INFO] crate cszatma/rust-tetris already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cszatma/rust-tetris against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/cszatma/rust-tetris:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3b4f207ab67d96b31d05794ceeb17ff58b32abd4dbd4ed98dce395ab4de4439b
[INFO] running `"docker" "start" "-a" "3b4f207ab67d96b31d05794ceeb17ff58b32abd4dbd4ed98dce395ab4de4439b"`
[INFO] [stderr]     Checking rust-tetris v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `tetrimino::Tetrimino`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tetrimino::Tetrimino;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tetrimino::Tetrimino`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use tetrimino::Tetrimino;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/tetrimino.rs:80:14
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let (x, y) = self.position;
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/tetrimino.rs:80:17
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let (x, y) = self.position;
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/tetrimino.rs:80:14
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let (x, y) = self.position;
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/tetrimino.rs:80:17
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let (x, y) = self.position;
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut game = Game::init(input[0][1].parse().unwrap(), input[0][2].parse().unwrap());
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut game = Game::init(input[0][1].parse().unwrap(), input[0][2].parse().unwrap());
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_piece`
[INFO] [stderr]  --> src/game.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     current_piece: Option<Tetrimino>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `points`
[INFO] [stderr]  --> src/tetrimino.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     points: Vec<Vec<i32>>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `position`
[INFO] [stderr]  --> src/tetrimino.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     position: (i32, i32),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `symbol`
[INFO] [stderr]  --> src/tetrimino.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     symbol: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init`
[INFO] [stderr]   --> src/tetrimino.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn init(type_num: i32, position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_one`
[INFO] [stderr]   --> src/tetrimino.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn type_one(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_two`
[INFO] [stderr]   --> src/tetrimino.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn type_two(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_three`
[INFO] [stderr]   --> src/tetrimino.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn type_three(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_four`
[INFO] [stderr]   --> src/tetrimino.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn type_four(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_five`
[INFO] [stderr]   --> src/tetrimino.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn type_five(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_six`
[INFO] [stderr]   --> src/tetrimino.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn type_six(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_seven`
[INFO] [stderr]   --> src/tetrimino.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn type_seven(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_pos_on_board`
[INFO] [stderr]   --> src/tetrimino.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_pos_on_board(&self) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_x_values`
[INFO] [stderr]   --> src/tetrimino.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn get_x_values(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: field is never used: `current_piece`
[INFO] [stderr]  --> src/game.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     current_piece: Option<Tetrimino>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_y_values`
[INFO] [stderr]   --> src/tetrimino.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn get_y_values(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `points`
[INFO] [stderr]  --> src/tetrimino.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     points: Vec<Vec<i32>>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `position`
[INFO] [stderr]  --> src/tetrimino.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] warning: method is never used: `perform_move`
[INFO] [stderr] 6 |     position: (i32, i32),
[INFO] [stderr]   --> src/tetrimino.rs:68:5
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn perform_move(&mut self, board: &Board, move_str: String) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `symbol`
[INFO] [stderr]  --> src/tetrimino.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     symbol: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `shift_horizontally`
[INFO] [stderr]   --> src/tetrimino.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn shift_horizontally(&mut self, board: &Board, direction: String) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init`
[INFO] [stderr]   --> src/tetrimino.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn init(type_num: i32, position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_one`
[INFO] [stderr]   --> src/tetrimino.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn type_one(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: method is never used: `shift_down`
[INFO] [stderr]   --> src/tetrimino.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn shift_down(&mut self, board: &Board) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_two`
[INFO] [stderr]   --> src/tetrimino.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn type_two(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perform_drop`
[INFO] [stderr]   --> src/tetrimino.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn perform_drop(&mut self, board: &Board) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_three`
[INFO] [stderr]   --> src/tetrimino.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn type_three(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_on_bottom`
[INFO] [stderr]    --> src/tetrimino.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     fn is_on_bottom(&self, board: &Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_four`
[INFO] [stderr]   --> src/tetrimino.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn type_four(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `piece_does_overlap`
[INFO] [stderr]    --> src/tetrimino.rs:109:5
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn piece_does_overlap(&self, board: &Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: method is never used: `type_five`
[INFO] [stderr]   --> src/tetrimino.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn type_five(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_six`
[INFO] [stderr] warning: method is never used: `is_out_of_bounds`
[INFO] [stderr]    --> src/tetrimino.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn is_out_of_bounds(&self, board: &Board) -> bool {
[INFO] [stderr]   --> src/tetrimino.rs:46:5
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn type_six(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_seven`
[INFO] [stderr]   --> src/tetrimino.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn type_seven(position: (i32, i32)) -> Tetrimino {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: method is never used: `values_at_positions`
[INFO] [stderr] 
[INFO] [stderr]   --> src/board.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn values_at_positions(&self, positions: Vec<Vec<i32>>) -> Vec<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_pos_on_board`
[INFO] [stderr]   --> src/tetrimino.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_pos_on_board(&self) -> Vec<Vec<i32>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_piece_at_positions`
[INFO] [stderr]   --> src/board.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn has_piece_at_positions(&self, positions: Vec<Vec<i32>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_x_values`
[INFO] [stderr]   --> src/tetrimino.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn get_x_values(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_of_rows`
[INFO] [stderr]   --> src/board.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn num_of_rows(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: method is never used: `get_y_values`
[INFO] [stderr]   --> src/tetrimino.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn get_y_values(&self) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perform_move`
[INFO] [stderr] warning: variant is never constructed: `Ok`
[INFO] [stderr]  --> src/status.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Ok,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   --> src/tetrimino.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn perform_move(&mut self, board: &Board, move_str: String) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Failed`
[INFO] [stderr]  --> src/status.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Failed,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `shift_horizontally`
[INFO] [stderr]   --> src/tetrimino.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn shift_horizontally(&mut self, board: &Board, direction: String) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `shift_down`
[INFO] [stderr]   --> src/tetrimino.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] warning: variant is never constructed: `Placed`
[INFO] [stderr] 89 |     fn shift_down(&mut self, board: &Board) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]  --> src/status.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Placed,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `perform_drop`
[INFO] [stderr]   --> src/tetrimino.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn perform_drop(&mut self, board: &Board) -> Status {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_on_bottom`
[INFO] [stderr]    --> src/tetrimino.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     fn is_on_bottom(&self, board: &Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `piece_does_overlap`
[INFO] [stderr]    --> src/tetrimino.rs:109:5
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn piece_does_overlap(&self, board: &Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_out_of_bounds`
[INFO] [stderr]    --> src/tetrimino.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn is_out_of_bounds(&self, board: &Board) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `values_at_positions`
[INFO] [stderr]   --> src/board.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn values_at_positions(&self, positions: Vec<Vec<i32>>) -> Vec<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_piece_at_positions`
[INFO] [stderr]   --> src/board.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn has_piece_at_positions(&self, positions: Vec<Vec<i32>>) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_of_rows`
[INFO] [stderr]   --> src/board.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn num_of_rows(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Ok`
[INFO] [stderr]  --> src/status.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Ok,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Failed`
[INFO] [stderr]  --> src/status.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Failed,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Placed`
[INFO] [stderr]  --> src/status.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Placed,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "3b4f207ab67d96b31d05794ceeb17ff58b32abd4dbd4ed98dce395ab4de4439b"`
[INFO] running `"docker" "rm" "-f" "3b4f207ab67d96b31d05794ceeb17ff58b32abd4dbd4ed98dce395ab4de4439b"`
[INFO] [stdout] 3b4f207ab67d96b31d05794ceeb17ff58b32abd4dbd4ed98dce395ab4de4439b