[INFO] cloning repository https://github.com/bbush915/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/bbush915/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbbush915%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbbush915%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5a27e3b824507460a729ef37bf0b7c63836f973
[INFO] testing bbush915/sudoku-solver against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbbush915%2Fsudoku-solver" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bbush915/sudoku-solver on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bbush915/sudoku-solver
[INFO] finished tweaking git repo https://github.com/bbush915/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/bbush915/sudoku-solver written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/bbush915/sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36e38857974d195231fcc1332e926d60e0e2abc00ae0f483ba5360f84a5c2db3
[INFO] running `Command { std: "docker" "start" "-a" "36e38857974d195231fcc1332e926d60e0e2abc00ae0f483ba5360f84a5c2db3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36e38857974d195231fcc1332e926d60e0e2abc00ae0f483ba5360f84a5c2db3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36e38857974d195231fcc1332e926d60e0e2abc00ae0f483ba5360f84a5c2db3", kill_on_drop: false }`
[INFO] [stdout] 36e38857974d195231fcc1332e926d60e0e2abc00ae0f483ba5360f84a5c2db3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd988a97ed7562cdbad4109359fcd1bab6300b54ec1ecfcf933f16c045c3a197
[INFO] running `Command { std: "docker" "start" "-a" "bd988a97ed7562cdbad4109359fcd1bab6300b54ec1ecfcf933f16c045c3a197", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Step`
[INFO] [stdout]    --> src/main.rs:108:10
[INFO] [stdout]     |
[INFO] [stdout] 108 |   struct Step {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]    --> src/main.rs:113:10
[INFO] [stdout]     |
[INFO] [stdout] 113 |   pub fn solve(
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_step`
[INFO] [stdout]    --> src/main.rs:199:6
[INFO] [stdout]     |
[INFO] [stdout] 199 |   fn generate_step(grid: &utils::Cells, index: usize, initial_value: u8) -> Option<Step> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.49s
[INFO] running `Command { std: "docker" "inspect" "bd988a97ed7562cdbad4109359fcd1bab6300b54ec1ecfcf933f16c045c3a197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd988a97ed7562cdbad4109359fcd1bab6300b54ec1ecfcf933f16c045c3a197", kill_on_drop: false }`
[INFO] [stdout] bd988a97ed7562cdbad4109359fcd1bab6300b54ec1ecfcf933f16c045c3a197
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e231aba193778868bfd92fcaf8cde31b819ac0edbc4ae464dce367f99ee383da
[INFO] running `Command { std: "docker" "start" "-a" "e231aba193778868bfd92fcaf8cde31b819ac0edbc4ae464dce367f99ee383da", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Step`
[INFO] [stdout]    --> src/main.rs:108:10
[INFO] [stdout]     |
[INFO] [stdout] 108 |   struct Step {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]    --> src/main.rs:113:10
[INFO] [stdout]     |
[INFO] [stdout] 113 |   pub fn solve(
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_step`
[INFO] [stdout]    --> src/main.rs:199:6
[INFO] [stdout]     |
[INFO] [stdout] 199 |   fn generate_step(grid: &utils::Cells, index: usize, initial_value: u8) -> Option<Step> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e231aba193778868bfd92fcaf8cde31b819ac0edbc4ae464dce367f99ee383da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e231aba193778868bfd92fcaf8cde31b819ac0edbc4ae464dce367f99ee383da", kill_on_drop: false }`
[INFO] [stdout] e231aba193778868bfd92fcaf8cde31b819ac0edbc4ae464dce367f99ee383da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ff5194b3733e097f83da71695a66261abbde338dc2cf1ed5bbcebfd74bb94131
[INFO] running `Command { std: "docker" "start" "-a" "ff5194b3733e097f83da71695a66261abbde338dc2cf1ed5bbcebfd74bb94131", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `Step`
[INFO] [stderr]    --> src/main.rs:108:10
[INFO] [stderr]     |
[INFO] [stderr] 108 |   struct Step {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]    --> src/main.rs:113:10
[INFO] [stderr]     |
[INFO] [stderr] 113 |   pub fn solve(
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `generate_step`
[INFO] [stderr]    --> src/main.rs:199:6
[INFO] [stderr]     |
[INFO] [stderr] 199 |   fn generate_step(grid: &utils::Cells, index: usize, initial_value: u8) -> Option<Step> {
[INFO] [stderr]     |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-63742537fd1248d2)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ff5194b3733e097f83da71695a66261abbde338dc2cf1ed5bbcebfd74bb94131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff5194b3733e097f83da71695a66261abbde338dc2cf1ed5bbcebfd74bb94131", kill_on_drop: false }`
[INFO] [stdout] ff5194b3733e097f83da71695a66261abbde338dc2cf1ed5bbcebfd74bb94131