[INFO] fetching crate lib_battleship 2.1.0...
[INFO] testing lib_battleship-2.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate lib_battleship 2.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lib_battleship 2.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lib_battleship 2.1.0
[INFO] finished tweaking crates.io crate lib_battleship 2.1.0
[INFO] tweaked toml for crates.io crate lib_battleship 2.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b8b3cbe95b52360f756b970f17a171b28f63bfc08319705b60cce42b1f90440
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6b8b3cbe95b52360f756b970f17a171b28f63bfc08319705b60cce42b1f90440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b8b3cbe95b52360f756b970f17a171b28f63bfc08319705b60cce42b1f90440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b8b3cbe95b52360f756b970f17a171b28f63bfc08319705b60cce42b1f90440", kill_on_drop: false }`
[INFO] [stdout] 6b8b3cbe95b52360f756b970f17a171b28f63bfc08319705b60cce42b1f90440
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41452c6bcad6df83d9e00d2fcaac382346f47fe44594c55936107831e9d971af
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "41452c6bcad6df83d9e00d2fcaac382346f47fe44594c55936107831e9d971af", kill_on_drop: false }`
[INFO] [stderr]    Compiling lib_battleship v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             mem::replace(&mut self.status_p1[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             mem::replace(&mut self.status_p2[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "41452c6bcad6df83d9e00d2fcaac382346f47fe44594c55936107831e9d971af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41452c6bcad6df83d9e00d2fcaac382346f47fe44594c55936107831e9d971af", kill_on_drop: false }`
[INFO] [stdout] 41452c6bcad6df83d9e00d2fcaac382346f47fe44594c55936107831e9d971af
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e2b905ee4dd242d104a5ddaa37003300a2b1c601130d3619395573df18f1135
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9e2b905ee4dd242d104a5ddaa37003300a2b1c601130d3619395573df18f1135", kill_on_drop: false }`
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             mem::replace(&mut self.status_p1[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lib_battleship v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             mem::replace(&mut self.status_p2[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             mem::replace(&mut self.status_p1[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/battlefield/ship_status.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             mem::replace(&mut self.status_p2[ship_type_id], curr_val - 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "9e2b905ee4dd242d104a5ddaa37003300a2b1c601130d3619395573df18f1135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e2b905ee4dd242d104a5ddaa37003300a2b1c601130d3619395573df18f1135", kill_on_drop: false }`
[INFO] [stdout] 9e2b905ee4dd242d104a5ddaa37003300a2b1c601130d3619395573df18f1135
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7a6d4bc7603901608a71d77da51e80fb499946e3e62d6e7a0a36ef7525a51f6c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7a6d4bc7603901608a71d77da51e80fb499946e3e62d6e7a0a36ef7525a51f6c", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/battlefield/ship_status.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             mem::replace(&mut self.status_p1[ship_type_id], curr_val - 1);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/battlefield/ship_status.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |             mem::replace(&mut self.status_p2[ship_type_id], curr_val - 1);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `lib_battleship` (lib) generated 2 warnings
[INFO] [stderr] warning: `lib_battleship` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lib_battleship-cba4ea9f02677454)
[INFO] [stdout] 
[INFO] [stdout] running 37 tests
[INFO] [stdout] test battlefield::battlefield::test::should_return_width ... ok
[INFO] [stdout] test battlefield::cell::tests::assert_shooting_works ... ok
[INFO] [stdout] test battlefield::ship_status::test::should_sum_player_health ... ok
[INFO] [stdout] test game::test::can_get_cell_status_for_opponent ... ok
[INFO] [stdout] test game::test::can_get_cell_status_for_owner ... ok
[INFO] [stdout] test game::test::a_hit_lets_you_shoot_again ... ok
[INFO] [stdout] test game::test::destroying_a_ship_returns_ship_destroyed ... ok
[INFO] [stdout] test game::test::destroying_last_ship_wins_game ... ok
[INFO] [stdout] test game::test::owner_cell_status_doesnt_show_misses ... ok
[INFO] [stdout] test game::test::shooting_at_empty_cells_is_a_miss ... ok
[INFO] [stdout] test game::test::shooting_at_filled_cells_is_a_hit ... ok
[INFO] [stdout] test game::test::shooting_out_of_bounds_is_an_error ... ok
[INFO] [stdout] test game::test::should_not_allow_shots_after_game_ends ... ok
[INFO] [stdout] test game::test::should_respect_order_of_play ... ok
[INFO] [stdout] test pregame::test::constructor_should_check_dimensions ... ok
[INFO] [stdout] test pregame::test::should_allow_adding_ship_types ... ok
[INFO] [stdout] test pregame::test::should_disallow_placing_ships_of_unknown_type ... ok
[INFO] [stdout] test pregame::test::should_disallow_placing_ships_out_of_bounds ... ok
[INFO] [stdout] test pregame::test::should_disallow_zero_length_ship_types ... ok
[INFO] [stdout] test pregame::test::should_disallow_placing_ships_twice ... ok
[INFO] [stdout] test pregame::test::should_disallow_too_long_ship_types ... ok
[INFO] [stdout] test pregame::test::should_not_start_when_no_ships_placed ... ok
[INFO] [stdout] test pregame::test::should_not_start_when_not_all_ships_placed ... ok
[INFO] [stdout] test pregame::test::should_return_dimensions ... ok
[INFO] [stdout] test game::test::should_return_dimensions ... ok
[INFO] [stdout] test pregame::test::should_start_game ... ok
[INFO] [stdout] test game::test::should_tell_whos_turn_it_is ... ok
[INFO] [stdout] test game::test::should_return_contained_ship_types ... ok
[INFO] [stdout] test pregame::test::should_disallow_placing_ships_on_top_of_each_other ... ok
[INFO] [stdout] test battlefield::cell::tests::assert_ship_type_id_works ... ok
[INFO] [stdout] test battlefield::cell::tests::assert_shoot_sets_shot ... ok
[INFO] [stdout] test common::player::test::should_alternate_between_players ... ok
[INFO] [stdout] test battlefield::cell::tests::assert_new_cells_are_empty_and_not_shot ... ok
[INFO] [stdout] test pregame::test::can_get_cell_status ... ok
[INFO] [stdout] test common::ship_type::test::constructor_should_work ... ok
[INFO] [stdout] test battlefield::battlefield::test::should_give_out_cell_references ... ok
[INFO] [stderr]    Doc-tests lib_battleship
[INFO] [stdout] test pregame::test::should_allow_placing_ships ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 37 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/game.rs - game::Game::shoot (line 62) ... ok
[INFO] [stdout] test src/pregame.rs - pregame::PreGame::place_ship (line 116) ... ok
[INFO] [stdout] test src/lib.rs - (line 6) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.54s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7a6d4bc7603901608a71d77da51e80fb499946e3e62d6e7a0a36ef7525a51f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a6d4bc7603901608a71d77da51e80fb499946e3e62d6e7a0a36ef7525a51f6c", kill_on_drop: false }`
[INFO] [stdout] 7a6d4bc7603901608a71d77da51e80fb499946e3e62d6e7a0a36ef7525a51f6c