[INFO] cloning repository strohs/rust-minesweeper
[INFO] running `"git" "clone" "--bare" "git://github.com/strohs/rust-minesweeper.git" "work/cache/sources/gh/strohs/rust-minesweeper"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/strohs/rust-minesweeper'...
[INFO] running `"git" "clone" "work/cache/sources/gh/strohs/rust-minesweeper" "work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/strohs/rust-minesweeper" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/strohs/rust-minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/strohs/rust-minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 82ffbbd887cd843174b2a7b29f5828839eeed39c
[INFO] sha for GitHub repo strohs/rust-minesweeper: 82ffbbd887cd843174b2a7b29f5828839eeed39c
[INFO] validating manifest of strohs/rust-minesweeper on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of strohs/rust-minesweeper on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing strohs/rust-minesweeper
[INFO] finished frobbing strohs/rust-minesweeper
[INFO] frobbed toml for strohs/rust-minesweeper written to work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper/Cargo.toml
[INFO] started frobbing strohs/rust-minesweeper
[INFO] finished frobbing strohs/rust-minesweeper
[INFO] frobbed toml for strohs/rust-minesweeper written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/strohs/rust-minesweeper/Cargo.toml
[INFO] crate strohs/rust-minesweeper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing strohs/rust-minesweeper against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 1ff27b7ff43e82c2d8bbd42436530eccfe16412710faaeaced510f9d9b963476
[INFO] running `"docker" "start" "-a" "1ff27b7ff43e82c2d8bbd42436530eccfe16412710faaeaced510f9d9b963476"`
[INFO] [stderr]    Compiling rust-minesweeper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `elapsed_time`
[INFO] [stderr]   --> src/minesweeper.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     elapsed_time: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.77s
[INFO] running `"docker" "inspect" "1ff27b7ff43e82c2d8bbd42436530eccfe16412710faaeaced510f9d9b963476"`
[INFO] running `"docker" "rm" "-f" "1ff27b7ff43e82c2d8bbd42436530eccfe16412710faaeaced510f9d9b963476"`
[INFO] [stdout] 1ff27b7ff43e82c2d8bbd42436530eccfe16412710faaeaced510f9d9b963476
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] dd592712a4f02e9210921c08deb90f64689af9f6ae8f4ddc2811c3222e71873a
[INFO] running `"docker" "start" "-a" "dd592712a4f02e9210921c08deb90f64689af9f6ae8f4ddc2811c3222e71873a"`
[INFO] [stderr]    Compiling rust-minesweeper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `crate::game_cell::CellKind::Empty`
[INFO] [stderr]    --> src/game_cell.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 |     use crate::game_cell::CellKind::Empty;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `elapsed_time`
[INFO] [stderr]   --> src/minesweeper.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     elapsed_time: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.57s
[INFO] running `"docker" "inspect" "dd592712a4f02e9210921c08deb90f64689af9f6ae8f4ddc2811c3222e71873a"`
[INFO] running `"docker" "rm" "-f" "dd592712a4f02e9210921c08deb90f64689af9f6ae8f4ddc2811c3222e71873a"`
[INFO] [stdout] dd592712a4f02e9210921c08deb90f64689af9f6ae8f4ddc2811c3222e71873a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/strohs/rust-minesweeper:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 1c48e2ce78e8070ed3d1f114536613047450177438b07dd8bd8f68c72c7b965f
[INFO] running `"docker" "start" "-a" "1c48e2ce78e8070ed3d1f114536613047450177438b07dd8bd8f68c72c7b965f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_minesweeper-1a687910ccaaaed2
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test game_cell::tests::hidden_cell_should_display_as_hidden_char ... ok
[INFO] [stdout] test game_cell::tests::lone_cell_test_should_return_false_for_any_mined_cell ... ok
[INFO] [stdout] test game_cell::tests::lone_cell_test_should_return_false_for_empty_cell_with_gt_0_adj_mines ... ok
[INFO] [stdout] test game_cell::tests::flagged_cell_displays_the_flag_char ... ok
[INFO] [stdout] test game_cell::tests::revealed_empty_cell_with_adjacent_mines_should_display_adj_mine_count ... ok
[INFO] [stdout] test game_cell::tests::lone_cell_test_should_return_true_for_empty_cell_with_0_adj_mines ... ok
[INFO] [stdout] test game_cell::tests::questioned_cell_displays_the_question_char ... ok
[INFO] [stdout] test game_cell::tests::revealed_empty_cell_with_no_adjacent_mines_should_display_revealed_char ... ok
[INFO] [stdout] test game_cell::tests::revealed_mined_cell_should_display_as_mine_char ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1c48e2ce78e8070ed3d1f114536613047450177438b07dd8bd8f68c72c7b965f"`
[INFO] running `"docker" "rm" "-f" "1c48e2ce78e8070ed3d1f114536613047450177438b07dd8bd8f68c72c7b965f"`
[INFO] [stdout] 1c48e2ce78e8070ed3d1f114536613047450177438b07dd8bd8f68c72c7b965f