[INFO] updating cached repository sdbondi/rust-sudoku-solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sdbondi/rust-sudoku-solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sdbondi/rust-sudoku-solver" "work/ex/beta-1.38-1/sources/1.37.0/gh/sdbondi/rust-sudoku-solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sdbondi/rust-sudoku-solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sdbondi/rust-sudoku-solver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed82543988f6c485955e2a7ae6c503bbcefd6b7a
[INFO] sha for GitHub repo sdbondi/rust-sudoku-solver: ed82543988f6c485955e2a7ae6c503bbcefd6b7a
[INFO] validating manifest of sdbondi/rust-sudoku-solver on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sdbondi/rust-sudoku-solver on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sdbondi/rust-sudoku-solver
[INFO] finished frobbing sdbondi/rust-sudoku-solver
[INFO] frobbed toml for sdbondi/rust-sudoku-solver written to work/ex/beta-1.38-1/sources/1.37.0/gh/sdbondi/rust-sudoku-solver/Cargo.toml
[INFO] started frobbing sdbondi/rust-sudoku-solver
[INFO] finished frobbing sdbondi/rust-sudoku-solver
[INFO] frobbed toml for sdbondi/rust-sudoku-solver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver/Cargo.toml
[INFO] crate sdbondi/rust-sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sdbondi/rust-sudoku-solver against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] edf8aaf9b15c2d5bab85d77d1aafb15a561df5454f144f2fc53af5d76a9c9b36
[INFO] running `"docker" "start" "-a" "edf8aaf9b15c2d5bab85d77d1aafb15a561df5454f144f2fc53af5d76a9c9b36"`
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling glutin v0.14.0
[INFO] [stderr]    Compiling pistoncore-input v0.21.0
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling pistoncore-window v0.32.0
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling pistoncore-event_loop v0.37.0
[INFO] [stderr]    Compiling pistoncore-sdl2_window v0.50.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling piston v0.37.0
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling winit v0.12.0
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.47.0
[INFO] [stderr]    Compiling piston-gfx_texture v0.32.0
[INFO] [stderr]    Compiling piston2d-opengl_graphics v0.53.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.51.0
[INFO] [stderr]    Compiling piston_window v0.80.0
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `piston::event_loop::*`
[INFO] [stderr]  --> src/cell.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use piston::event_loop::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `board`
[INFO] [stderr]   --> src/board.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   board: [[u8; BOARD_SIZE]; BOARD_SIZE],
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Selected`
[INFO] [stderr]   --> src/cell.rs:12:3
[INFO] [stderr]    |
[INFO] [stderr] 12 |   Selected,
[INFO] [stderr]    |   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `number`
[INFO] [stderr]   --> src/cell.rs:21:3
[INFO] [stderr]    |
[INFO] [stderr] 21 |   number: u8,
[INFO] [stderr]    |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `"docker" "inspect" "edf8aaf9b15c2d5bab85d77d1aafb15a561df5454f144f2fc53af5d76a9c9b36"`
[INFO] running `"docker" "rm" "-f" "edf8aaf9b15c2d5bab85d77d1aafb15a561df5454f144f2fc53af5d76a9c9b36"`
[INFO] [stdout] edf8aaf9b15c2d5bab85d77d1aafb15a561df5454f144f2fc53af5d76a9c9b36
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3d5ef21d8caf4fe98b1efb7b2e0361866fa1a809760849d41d5a03dd2e93d1b2
[INFO] running `"docker" "start" "-a" "3d5ef21d8caf4fe98b1efb7b2e0361866fa1a809760849d41d5a03dd2e93d1b2"`
[INFO] [stderr]    Compiling sudoku-solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `piston::event_loop::*`
[INFO] [stderr]  --> src/cell.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use piston::event_loop::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `board`
[INFO] [stderr]   --> src/board.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   board: [[u8; BOARD_SIZE]; BOARD_SIZE],
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Selected`
[INFO] [stderr]   --> src/cell.rs:12:3
[INFO] [stderr]    |
[INFO] [stderr] 12 |   Selected,
[INFO] [stderr]    |   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `number`
[INFO] [stderr]   --> src/cell.rs:21:3
[INFO] [stderr]    |
[INFO] [stderr] 21 |   number: u8,
[INFO] [stderr]    |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.31s
[INFO] running `"docker" "inspect" "3d5ef21d8caf4fe98b1efb7b2e0361866fa1a809760849d41d5a03dd2e93d1b2"`
[INFO] running `"docker" "rm" "-f" "3d5ef21d8caf4fe98b1efb7b2e0361866fa1a809760849d41d5a03dd2e93d1b2"`
[INFO] [stdout] 3d5ef21d8caf4fe98b1efb7b2e0361866fa1a809760849d41d5a03dd2e93d1b2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sdbondi/rust-sudoku-solver:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 8d60277c31a4d35cf8b3270d7f629a30b8fa77cc7da74fa92699f96109516cb5
[INFO] running `"docker" "start" "-a" "8d60277c31a4d35cf8b3270d7f629a30b8fa77cc7da74fa92699f96109516cb5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sudoku_solver-70df35830075e25a
[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 `"docker" "inspect" "8d60277c31a4d35cf8b3270d7f629a30b8fa77cc7da74fa92699f96109516cb5"`
[INFO] running `"docker" "rm" "-f" "8d60277c31a4d35cf8b3270d7f629a30b8fa77cc7da74fa92699f96109516cb5"`
[INFO] [stdout] 8d60277c31a4d35cf8b3270d7f629a30b8fa77cc7da74fa92699f96109516cb5