[INFO] cloning repository https://github.com/aarish98/rust_minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aarish98/rust_minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarish98%2Frust_minesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarish98%2Frust_minesweeper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5cd34bcef4b27a672175825015cab6f0a8251313
[INFO] checking aarish98/rust_minesweeper against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarish98%2Frust_minesweeper" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aarish98/rust_minesweeper on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aarish98/rust_minesweeper
[INFO] finished tweaking git repo https://github.com/aarish98/rust_minesweeper
[INFO] tweaked toml for git repo https://github.com/aarish98/rust_minesweeper written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aarish98/rust_minesweeper 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd11dcea5708209bab5b57d4d371045c8433144aae744dc9aedb4c9f3f5d9291
[INFO] running `Command { std: "docker" "start" "-a" "dd11dcea5708209bab5b57d4d371045c8433144aae744dc9aedb4c9f3f5d9291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd11dcea5708209bab5b57d4d371045c8433144aae744dc9aedb4c9f3f5d9291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd11dcea5708209bab5b57d4d371045c8433144aae744dc9aedb4c9f3f5d9291", kill_on_drop: false }`
[INFO] [stdout] dd11dcea5708209bab5b57d4d371045c8433144aae744dc9aedb4c9f3f5d9291
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7264634ad35ed79b08f1c4994165f7c6f5fbe3a90fda3c152f4d22140a0816b
[INFO] running `Command { std: "docker" "start" "-a" "a7264634ad35ed79b08f1c4994165f7c6f5fbe3a90fda3c152f4d22140a0816b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust_minesweeper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `collections::btree_map::Range`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, collections::btree_map::Range};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::btree_map::Range`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, collections::btree_map::Range};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]   --> src/main.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]   --> src/main.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mineSweeper`
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mineSweeper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mineSweeper`
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mineSweeper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, `open_cells`, `mines`, and `flagged_cells` are never read
[INFO] [stdout]   --> src/main.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct MineSweeper {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 7  |     width: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 8  |     height: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 9  |     open_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     mines: Vec<Position>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     flagged_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mineSweeper` should have a snake case name
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: convert the identifier to snake case: `mine_sweeper`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, `open_cells`, `mines`, and `flagged_cells` are never read
[INFO] [stdout]   --> src/main.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct MineSweeper {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 7  |     width: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 8  |     height: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 9  |     open_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     mines: Vec<Position>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     flagged_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mineSweeper` should have a snake case name
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: convert the identifier to snake case: `mine_sweeper`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `Command { std: "docker" "inspect" "a7264634ad35ed79b08f1c4994165f7c6f5fbe3a90fda3c152f4d22140a0816b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7264634ad35ed79b08f1c4994165f7c6f5fbe3a90fda3c152f4d22140a0816b", kill_on_drop: false }`
[INFO] [stdout] a7264634ad35ed79b08f1c4994165f7c6f5fbe3a90fda3c152f4d22140a0816b
[INFO] checking aarish98/rust_minesweeper against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faarish98%2Frust_minesweeper" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aarish98/rust_minesweeper on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aarish98/rust_minesweeper
[INFO] finished tweaking git repo https://github.com/aarish98/rust_minesweeper
[INFO] tweaked toml for git repo https://github.com/aarish98/rust_minesweeper written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/aarish98/rust_minesweeper 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 843e2191744f72cc5bb14f8b0fef499116cc242c89c4ba5a8909447928f377f7
[INFO] running `Command { std: "docker" "start" "-a" "843e2191744f72cc5bb14f8b0fef499116cc242c89c4ba5a8909447928f377f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "843e2191744f72cc5bb14f8b0fef499116cc242c89c4ba5a8909447928f377f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "843e2191744f72cc5bb14f8b0fef499116cc242c89c4ba5a8909447928f377f7", kill_on_drop: false }`
[INFO] [stdout] 843e2191744f72cc5bb14f8b0fef499116cc242c89c4ba5a8909447928f377f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b522b1340e1105b482d5bd431699922981b91a05f0e061793a026302e0dc02e9
[INFO] running `Command { std: "docker" "start" "-a" "b522b1340e1105b482d5bd431699922981b91a05f0e061793a026302e0dc02e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust_minesweeper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `collections::btree_map::Range`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, collections::btree_map::Range};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::btree_map::Range`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, collections::btree_map::Range};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]   --> src/main.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mineSweeper`
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mineSweeper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, `open_cells`, `mines`, and `flagged_cells` are never read
[INFO] [stdout]   --> src/main.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct MineSweeper {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 7  |     width: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 8  |     height: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 9  |     open_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     mines: Vec<Position>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     flagged_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mineSweeper` should have a snake case name
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: convert the identifier to snake case: `mine_sweeper`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]   --> src/main.rs:69:17
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mineSweeper`
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mineSweeper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut grid  =  [[0u8; 4]; 6];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, `open_cells`, `mines`, and `flagged_cells` are never read
[INFO] [stdout]   --> src/main.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct MineSweeper {
[INFO] [stdout]    |        ----------- fields in this struct
[INFO] [stdout] 7  |     width: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 8  |     height: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 9  |     open_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     mines: Vec<Position>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     flagged_cells: Vec<Position>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mineSweeper` should have a snake case name
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut mineSweeper = MineSweeper::new(grid_size, grid_size, (0.25_f64 * (grid_size* grid_size) as f64).floor() as usize );
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: convert the identifier to snake case: `mine_sweeper`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.46s
[INFO] running `Command { std: "docker" "inspect" "b522b1340e1105b482d5bd431699922981b91a05f0e061793a026302e0dc02e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b522b1340e1105b482d5bd431699922981b91a05f0e061793a026302e0dc02e9", kill_on_drop: false }`
[INFO] [stdout] b522b1340e1105b482d5bd431699922981b91a05f0e061793a026302e0dc02e9