[INFO] cloning repository https://github.com/PatrykStronski/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PatrykStronski/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrykStronski%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrykStronski%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 952b894501e0b359a1d47cef7375735cc23a6c8f
[INFO] testing PatrykStronski/sudoku against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPatrykStronski%2Fsudoku" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PatrykStronski/sudoku on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PatrykStronski/sudoku
[INFO] finished tweaking git repo https://github.com/PatrykStronski/sudoku
[INFO] tweaked toml for git repo https://github.com/PatrykStronski/sudoku written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/PatrykStronski/sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d942126e9c19678fe8126f88f499450d47accf15d2659173698912e818c0c073
[INFO] running `Command { std: "docker" "start" "-a" "d942126e9c19678fe8126f88f499450d47accf15d2659173698912e818c0c073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d942126e9c19678fe8126f88f499450d47accf15d2659173698912e818c0c073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d942126e9c19678fe8126f88f499450d47accf15d2659173698912e818c0c073", kill_on_drop: false }`
[INFO] [stdout] d942126e9c19678fe8126f88f499450d47accf15d2659173698912e818c0c073
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 543729e37fdb2d8b491ea7cb4ddb2cef54a7a8952290b02b4b7678d5aa3d3dea
[INFO] running `Command { std: "docker" "start" "-a" "543729e37fdb2d8b491ea7cb4ddb2cef54a7a8952290b02b4b7678d5aa3d3dea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling bstr v0.2.12
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `print_board`
[INFO] [stdout]   --> src/sudoku.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn print_board(&self, board: Vec<i16>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_current_board`
[INFO] [stdout]   --> src/sudoku.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn print_current_board(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_errors_with_solution`
[INFO] [stdout]   --> src/sudoku.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn get_errors_with_solution(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_quantity_empty_fields`
[INFO] [stdout]    --> src/sudoku.rs:153:12
[INFO] [stdout]     |
[INFO] [stdout] 153 |     pub fn get_quantity_empty_fields(&self) -> u8 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.91s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "543729e37fdb2d8b491ea7cb4ddb2cef54a7a8952290b02b4b7678d5aa3d3dea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "543729e37fdb2d8b491ea7cb4ddb2cef54a7a8952290b02b4b7678d5aa3d3dea", kill_on_drop: false }`
[INFO] [stdout] 543729e37fdb2d8b491ea7cb4ddb2cef54a7a8952290b02b4b7678d5aa3d3dea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1669b89c406d9950db05bb8720b54f4f062ca924dc8b8f55ccd3c47e1e5d841
[INFO] running `Command { std: "docker" "start" "-a" "f1669b89c406d9950db05bb8720b54f4f062ca924dc8b8f55ccd3c47e1e5d841", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `print_board`
[INFO] [stdout]   --> src/sudoku.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn print_board(&self, board: Vec<i16>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_current_board`
[INFO] [stdout]   --> src/sudoku.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn print_current_board(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_errors_with_solution`
[INFO] [stdout]   --> src/sudoku.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn get_errors_with_solution(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_quantity_empty_fields`
[INFO] [stdout]    --> src/sudoku.rs:153:12
[INFO] [stdout]     |
[INFO] [stdout] 153 |     pub fn get_quantity_empty_fields(&self) -> u8 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f1669b89c406d9950db05bb8720b54f4f062ca924dc8b8f55ccd3c47e1e5d841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1669b89c406d9950db05bb8720b54f4f062ca924dc8b8f55ccd3c47e1e5d841", kill_on_drop: false }`
[INFO] [stdout] f1669b89c406d9950db05bb8720b54f4f062ca924dc8b8f55ccd3c47e1e5d841
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cf614aa7ff379cc9a4b47fa9bdc2dda41a36ab0d00a4eb1ae46feda10dea149d
[INFO] running `Command { std: "docker" "start" "-a" "cf614aa7ff379cc9a4b47fa9bdc2dda41a36ab0d00a4eb1ae46feda10dea149d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: associated function is never used: `print_board`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/sudoku.rs:15:8
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 15 |     fn print_board(&self, board: Vec<i16>) -> String {
[INFO] [stdout] 
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_current_board`
[INFO] [stderr]   --> src/sudoku.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn print_current_board(&self) -> String {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_errors_with_solution`
[INFO] [stderr]   --> src/sudoku.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn get_errors_with_solution(&self) -> u8 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_quantity_empty_fields`
[INFO] [stderr]    --> src/sudoku.rs:153:12
[INFO] [stderr]     |
[INFO] [stderr] 153 |     pub fn get_quantity_empty_fields(&self) -> u8 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku-862fc84740533225)
[INFO] running `Command { std: "docker" "inspect" "cf614aa7ff379cc9a4b47fa9bdc2dda41a36ab0d00a4eb1ae46feda10dea149d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf614aa7ff379cc9a4b47fa9bdc2dda41a36ab0d00a4eb1ae46feda10dea149d", kill_on_drop: false }`
[INFO] [stdout] cf614aa7ff379cc9a4b47fa9bdc2dda41a36ab0d00a4eb1ae46feda10dea149d