[INFO] cloning repository https://github.com/ruggeri/sudoku_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ruggeri/sudoku_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruggeri%2Fsudoku_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruggeri%2Fsudoku_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6f77304a6366925acd849c5f564446cb7245b76
[INFO] testing ruggeri/sudoku_solver against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruggeri%2Fsudoku_solver" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ruggeri/sudoku_solver on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ruggeri/sudoku_solver
[INFO] finished tweaking git repo https://github.com/ruggeri/sudoku_solver
[INFO] tweaked toml for git repo https://github.com/ruggeri/sudoku_solver written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/ruggeri/sudoku_solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2618fd8403d8de87eaed8997ec6f3ef8518e886e486d33b5bbd21021adb2b62f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2618fd8403d8de87eaed8997ec6f3ef8518e886e486d33b5bbd21021adb2b62f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2618fd8403d8de87eaed8997ec6f3ef8518e886e486d33b5bbd21021adb2b62f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2618fd8403d8de87eaed8997ec6f3ef8518e886e486d33b5bbd21021adb2b62f", kill_on_drop: false }`
[INFO] [stdout] 2618fd8403d8de87eaed8997ec6f3ef8518e886e486d33b5bbd21021adb2b62f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e523ba1a907a676e738402543aca163d2b977261dfb563fcca0a4ff31fe2bad9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e523ba1a907a676e738402543aca163d2b977261dfb563fcca0a4ff31fe2bad9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.0
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling sudoku_solving v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/grid_checker.rs:68:11
[INFO] [stdout]    |
[INFO] [stdout] 68 |   #[allow(if_same_then_else)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:128:11
[INFO] [stdout]     |
[INFO] [stdout] 128 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:177:11
[INFO] [stdout]     |
[INFO] [stdout] 177 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:11
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `needless_bool`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/checker/grid_checker.rs:27:52
[INFO] [stdout]    |
[INFO] [stdout] 27 | ...                   SUDOKU_DIM_USIZE] = mem::uninitialized();
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SudokuChoice`, `SudokuPosition`, `SudokuValue`
[INFO] [stdout]  --> src/main.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   core::{SudokuChoice, SudokuGrid, SudokuPosition, SudokuValue},
[INFO] [stdout]   |          ^^^^^^^^^^^^              ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.93s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e523ba1a907a676e738402543aca163d2b977261dfb563fcca0a4ff31fe2bad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e523ba1a907a676e738402543aca163d2b977261dfb563fcca0a4ff31fe2bad9", kill_on_drop: false }`
[INFO] [stdout] e523ba1a907a676e738402543aca163d2b977261dfb563fcca0a4ff31fe2bad9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74ee297a3b247e2d6e48d01753c7fb92b97bddb551d23ff33d0e9e5d3c9e02e6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "74ee297a3b247e2d6e48d01753c7fb92b97bddb551d23ff33d0e9e5d3c9e02e6", kill_on_drop: false }`
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/grid_checker.rs:68:11
[INFO] [stdout]    |
[INFO] [stdout] 68 |   #[allow(if_same_then_else)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:128:11
[INFO] [stdout]     |
[INFO] [stdout] 128 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:177:11
[INFO] [stdout]     |
[INFO] [stdout] 177 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:11
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `needless_bool`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/checker/grid_checker.rs:27:52
[INFO] [stdout]    |
[INFO] [stdout] 27 | ...                   SUDOKU_DIM_USIZE] = mem::uninitialized();
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sudoku_solving v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/grid_checker.rs:68:11
[INFO] [stdout]    |
[INFO] [stdout] 68 |   #[allow(if_same_then_else)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:128:11
[INFO] [stdout]     |
[INFO] [stdout] 128 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]    --> src/checker/grid_checker.rs:177:11
[INFO] [stdout]     |
[INFO] [stdout] 177 |   #[allow(if_same_then_else)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `if_same_then_else`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:11
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `needless_bool`
[INFO] [stdout]   --> src/checker/group_checker.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SudokuChoice`, `SudokuPosition`, `SudokuValue`
[INFO] [stdout]  --> src/main.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   core::{SudokuChoice, SudokuGrid, SudokuPosition, SudokuValue},
[INFO] [stdout]   |          ^^^^^^^^^^^^              ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/checker/grid_checker.rs:27:52
[INFO] [stdout]    |
[INFO] [stdout] 27 | ...                   SUDOKU_DIM_USIZE] = mem::uninitialized();
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "74ee297a3b247e2d6e48d01753c7fb92b97bddb551d23ff33d0e9e5d3c9e02e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74ee297a3b247e2d6e48d01753c7fb92b97bddb551d23ff33d0e9e5d3c9e02e6", kill_on_drop: false }`
[INFO] [stdout] 74ee297a3b247e2d6e48d01753c7fb92b97bddb551d23ff33d0e9e5d3c9e02e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c16a9db1bcc8811049ce997b0dda09419abf2ce154c1f2f6524fad4def33ca4e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c16a9db1bcc8811049ce997b0dda09419abf2ce154c1f2f6524fad4def33ca4e", kill_on_drop: false }`
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/grid_checker.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |   #[allow(if_same_then_else)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:128:11
[INFO] [stderr]     |
[INFO] [stderr] 128 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:177:11
[INFO] [stderr]     |
[INFO] [stderr] 177 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:11
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `needless_bool`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:30
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |                              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/checker/grid_checker.rs:27:52
[INFO] [stderr]    |
[INFO] [stderr] 27 | ...                   SUDOKU_DIM_USIZE] = mem::uninitialized();
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/grid_checker.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |   #[allow(if_same_then_else)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:128:11
[INFO] [stderr]     |
[INFO] [stderr] 128 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]    --> src/checker/grid_checker.rs:177:11
[INFO] [stderr]     |
[INFO] [stderr] 177 |   #[allow(if_same_then_else)]
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `if_same_then_else`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:11
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `needless_bool`
[INFO] [stderr]   --> src/checker/group_checker.rs:42:30
[INFO] [stderr]    |
[INFO] [stderr] 42 |   #[allow(if_same_then_else, needless_bool)]
[INFO] [stderr]    |                              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/checker/grid_checker.rs:27:52
[INFO] [stderr]    |
[INFO] [stderr] 27 | ...                   SUDOKU_DIM_USIZE] = mem::uninitialized();
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `SudokuChoice`, `SudokuPosition`, `SudokuValue`
[INFO] [stdout] 
[INFO] [stderr]  --> src/main.rs:4:10
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 4 |   core::{SudokuChoice, SudokuGrid, SudokuPosition, SudokuValue},
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr]   |          ^^^^^^^^^^^^              ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sudoku_solving-656c551d6613cae4
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sudoku_solving-85fbdfa09d06db4e
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sudoku_solving
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c16a9db1bcc8811049ce997b0dda09419abf2ce154c1f2f6524fad4def33ca4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c16a9db1bcc8811049ce997b0dda09419abf2ce154c1f2f6524fad4def33ca4e", kill_on_drop: false }`
[INFO] [stdout] c16a9db1bcc8811049ce997b0dda09419abf2ce154c1f2f6524fad4def33ca4e