[INFO] cloning repository https://github.com/JamieSK/battleships
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JamieSK/battleships" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamieSK%2Fbattleships", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamieSK%2Fbattleships'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 989e6c2315ef3dc08bf94e0e5f882545a1364c62
[INFO] testing JamieSK/battleships against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamieSK%2Fbattleships" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JamieSK/battleships on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JamieSK/battleships
[INFO] finished tweaking git repo https://github.com/JamieSK/battleships
[INFO] tweaked toml for git repo https://github.com/JamieSK/battleships written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/JamieSK/battleships already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49f425694542ac698b6e46a22538b3099d47d7a4a2920f81af2d1e8baaeb9b36
[INFO] running `Command { std: "docker" "start" "-a" "49f425694542ac698b6e46a22538b3099d47d7a4a2920f81af2d1e8baaeb9b36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49f425694542ac698b6e46a22538b3099d47d7a4a2920f81af2d1e8baaeb9b36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49f425694542ac698b6e46a22538b3099d47d7a4a2920f81af2d1e8baaeb9b36", kill_on_drop: false }`
[INFO] [stdout] 49f425694542ac698b6e46a22538b3099d47d7a4a2920f81af2d1e8baaeb9b36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1dcc7d48a96a6268cacf7f9807930d3c945b1856365dc6e72bb2afc0fc715ee
[INFO] running `Command { std: "docker" "start" "-a" "e1dcc7d48a96a6268cacf7f9807930d3c945b1856365dc6e72bb2afc0fc715ee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling battleships v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:139:37
[INFO] [stdout]     |
[INFO] [stdout] 139 | ...                   let mut ships_left = self.ships_left(other_player);
[INFO] [stdout]     |                           ----^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.39s
[INFO] running `Command { std: "docker" "inspect" "e1dcc7d48a96a6268cacf7f9807930d3c945b1856365dc6e72bb2afc0fc715ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1dcc7d48a96a6268cacf7f9807930d3c945b1856365dc6e72bb2afc0fc715ee", kill_on_drop: false }`
[INFO] [stdout] e1dcc7d48a96a6268cacf7f9807930d3c945b1856365dc6e72bb2afc0fc715ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31b9dc6dfe5d9510546da65c794cfe80fb3a808e9fd6a6b82482827b82aee182
[INFO] running `Command { std: "docker" "start" "-a" "31b9dc6dfe5d9510546da65c794cfe80fb3a808e9fd6a6b82482827b82aee182", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:139:37
[INFO] [stdout]     |
[INFO] [stdout] 139 | ...                   let mut ships_left = self.ships_left(other_player);
[INFO] [stdout]     |                           ----^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling battleships v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:139:37
[INFO] [stdout]     |
[INFO] [stdout] 139 | ...                   let mut ships_left = self.ships_left(other_player);
[INFO] [stdout]     |                           ----^^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "31b9dc6dfe5d9510546da65c794cfe80fb3a808e9fd6a6b82482827b82aee182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31b9dc6dfe5d9510546da65c794cfe80fb3a808e9fd6a6b82482827b82aee182", kill_on_drop: false }`
[INFO] [stdout] 31b9dc6dfe5d9510546da65c794cfe80fb3a808e9fd6a6b82482827b82aee182
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5057c498349bc4d541d69cf747cf659faf430edd0a94e4c31ce6031c8334394c
[INFO] running `Command { std: "docker" "start" "-a" "5057c498349bc4d541d69cf747cf659faf430edd0a94e4c31ce6031c8334394c", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/lib.rs:139:37
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 139 | ...                   let mut ships_left = self.ships_left(other_player);
[INFO] [stdout] 
[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] warning: `battleships` (lib) generated 1 warning
[INFO] [stderr] warning: `battleships` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/battleships-8cc237c7b0db0f3f)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/battleships-e29b9485513cb986)
[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] [stderr]      Running tests/spec.rs (/opt/rustwide/target/debug/deps/spec-49a1f4008f213b75)
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test can_hit_empty_cell ... ok
[INFO] [stdout] test can_sink_player_twos_battleships ... ok
[INFO] [stdout] test can_play_again_if_you_hit_a_ship ... ok
[INFO] [stdout] test player_1_starts_with_a_blank_ships_board ... ok
[INFO] [stdout] test returns_true_once_all_ships_are_positioned ... ok
[INFO] [stdout] test hitting_one_players_ship_does_not_affect_the_others ... ok
[INFO] [stdout] test ship_on_board_starts_not_hit ... ok
[INFO] [stdout] test can_place_ships_in_any_order ... ok
[INFO] [stdout] test cannot_play_until_all_ships_are_placed ... ok
[INFO] [stdout] test can_place_a_submarine_on_the_board ... ok
[INFO] [stderr]    Doc-tests battleships
[INFO] [stdout] test cannot_place_ship_where_another_is ... ok
[INFO] [stdout] test starts_with_ships_not_placed ... ok
[INFO] [stdout] test cannot_play_on_same_cell_twice ... ok
[INFO] [stdout] test return_hit_when_hit_a_ship ... ok
[INFO] [stdout] test return_miss_when_hit_an_empty_cell ... ok
[INFO] [stdout] test return_sank_all_my_battleships_when_last_one_is_sunk ... ok
[INFO] [stdout] test return_sank_my_battleship_when_all_of_ship_has_been_hit ... ok
[INFO] [stdout] test cannot_play_twice_in_a_row_as_the_same_player ... ok
[INFO] [stdout] test can_hit_cell_with_ship ... ok
[INFO] [stdout] test player_1_starts_with_a_blank_shots_board ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5057c498349bc4d541d69cf747cf659faf430edd0a94e4c31ce6031c8334394c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5057c498349bc4d541d69cf747cf659faf430edd0a94e4c31ce6031c8334394c", kill_on_drop: false }`
[INFO] [stdout] 5057c498349bc4d541d69cf747cf659faf430edd0a94e4c31ce6031c8334394c