[INFO] updating cached repository JamieSK/battleships
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JamieSK/battleships
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JamieSK/battleships" "work/ex/beta-1.38-1/sources/1.37.0/gh/JamieSK/battleships"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/JamieSK/battleships'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JamieSK/battleships" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JamieSK/battleships"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JamieSK/battleships'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 989e6c2315ef3dc08bf94e0e5f882545a1364c62
[INFO] sha for GitHub repo JamieSK/battleships: 989e6c2315ef3dc08bf94e0e5f882545a1364c62
[INFO] validating manifest of JamieSK/battleships 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 JamieSK/battleships 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 JamieSK/battleships
[INFO] finished frobbing JamieSK/battleships
[INFO] frobbed toml for JamieSK/battleships written to work/ex/beta-1.38-1/sources/1.37.0/gh/JamieSK/battleships/Cargo.toml
[INFO] started frobbing JamieSK/battleships
[INFO] finished frobbing JamieSK/battleships
[INFO] frobbed toml for JamieSK/battleships written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JamieSK/battleships/Cargo.toml
[INFO] crate JamieSK/battleships 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 JamieSK/battleships 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-5/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/JamieSK/battleships:/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] 74862e1b9e2f1127df616f28c1db75bf828c26a251b790ceab080682bc5aef14
[INFO] running `"docker" "start" "-a" "74862e1b9e2f1127df616f28c1db75bf828c26a251b790ceab080682bc5aef14"`
[INFO] [stderr]    Compiling battleships v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:139:37
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                 let mut ships_left = self.ships_left(other_player);
[INFO] [stderr]     |                                     ----^^^^^^^^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `"docker" "inspect" "74862e1b9e2f1127df616f28c1db75bf828c26a251b790ceab080682bc5aef14"`
[INFO] running `"docker" "rm" "-f" "74862e1b9e2f1127df616f28c1db75bf828c26a251b790ceab080682bc5aef14"`
[INFO] [stdout] 74862e1b9e2f1127df616f28c1db75bf828c26a251b790ceab080682bc5aef14
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/JamieSK/battleships:/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] b3b61de4265ef6aafebb100bf837afba3d40e64fa6a79340868b27f110edb8f2
[INFO] running `"docker" "start" "-a" "b3b61de4265ef6aafebb100bf837afba3d40e64fa6a79340868b27f110edb8f2"`
[INFO] [stderr]    Compiling battleships v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:139:37
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                 let mut ships_left = self.ships_left(other_player);
[INFO] [stderr]     |                                     ----^^^^^^^^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `"docker" "inspect" "b3b61de4265ef6aafebb100bf837afba3d40e64fa6a79340868b27f110edb8f2"`
[INFO] running `"docker" "rm" "-f" "b3b61de4265ef6aafebb100bf837afba3d40e64fa6a79340868b27f110edb8f2"`
[INFO] [stdout] b3b61de4265ef6aafebb100bf837afba3d40e64fa6a79340868b27f110edb8f2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/JamieSK/battleships:/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] 03f20ba242c2faefa5a9fc48eb51bb9ecf0ff08b93531483f2c10e37dcf6606a
[INFO] running `"docker" "start" "-a" "03f20ba242c2faefa5a9fc48eb51bb9ecf0ff08b93531483f2c10e37dcf6606a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/battleships-aeb294b996f40b29
[INFO] [stderr]      Running /opt/crater/target/debug/deps/battleships-fc3c114f4d7678f0
[INFO] [stderr]      Running /opt/crater/target/debug/deps/spec-0d114cc5c938cc0c
[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] [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] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test can_place_a_submarine_on_the_board ... ok
[INFO] [stdout] test cannot_place_ship_where_another_is ... ok
[INFO] [stdout] test cannot_play_twice_in_a_row_as_the_same_player ... ok
[INFO] [stdout] test can_hit_empty_cell ... ok
[INFO] [stdout] test can_hit_cell_with_ship ... ok
[INFO] [stdout] test can_play_again_if_you_hit_a_ship ... ok
[INFO] [stdout] test cannot_play_on_same_cell_twice ... ok
[INFO] [stdout] test can_sink_player_twos_battleships ... ok
[INFO] [stdout] test can_place_ships_in_any_order ... ok
[INFO] [stdout] test return_sank_all_my_battleships_when_last_one_is_sunk ... ok
[INFO] [stdout] test return_miss_when_hit_an_empty_cell ... ok
[INFO] [stdout] test return_hit_when_hit_a_ship ... ok
[INFO] [stdout] test hitting_one_players_ship_does_not_affect_the_others ... ok
[INFO] [stdout] test player_1_starts_with_a_blank_ships_board ... ok
[INFO] [stdout] test return_sank_my_battleship_when_all_of_ship_has_been_hit ... ok
[INFO] [stdout] test returns_true_once_all_ships_are_positioned ... ok
[INFO] [stderr]    Doc-tests battleships
[INFO] [stdout] test player_1_starts_with_a_blank_shots_board ... ok
[INFO] [stdout] test ship_on_board_starts_not_hit ... ok
[INFO] [stdout] test cannot_play_until_all_ships_are_placed ... ok
[INFO] [stdout] test starts_with_ships_not_placed ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 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 `"docker" "inspect" "03f20ba242c2faefa5a9fc48eb51bb9ecf0ff08b93531483f2c10e37dcf6606a"`
[INFO] running `"docker" "rm" "-f" "03f20ba242c2faefa5a9fc48eb51bb9ecf0ff08b93531483f2c10e37dcf6606a"`
[INFO] [stdout] 03f20ba242c2faefa5a9fc48eb51bb9ecf0ff08b93531483f2c10e37dcf6606a