[INFO] crate lib_battleship 2.1.0 is already in cache
[INFO] checking lib_battleship-2.1.0 against master#8ac1525e091d3db28e67adcbbd6db1e1deaa37fb for pr-73323
[INFO] extracting crate lib_battleship 2.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate lib_battleship 2.1.0 on toolchain 8ac1525e091d3db28e67adcbbd6db1e1deaa37fb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "read-manifest" "--manifest-path" "Cargo.toml", 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-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c733cc5c4bbe049a7ee1c3ad23d05e333db1e7a0923eddf9d208da4a2170cd88
[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" "c733cc5c4bbe049a7ee1c3ad23d05e333db1e7a0923eddf9d208da4a2170cd88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c733cc5c4bbe049a7ee1c3ad23d05e333db1e7a0923eddf9d208da4a2170cd88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c733cc5c4bbe049a7ee1c3ad23d05e333db1e7a0923eddf9d208da4a2170cd88", kill_on_drop: false }`
[INFO] [stdout] c733cc5c4bbe049a7ee1c3ad23d05e333db1e7a0923eddf9d208da4a2170cd88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+8ac1525e091d3db28e67adcbbd6db1e1deaa37fb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc157e2fd06f4fa408d9f4ff53568dab0ab8908c7f60da18c31cc6b3e9da7755
[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" "fc157e2fd06f4fa408d9f4ff53568dab0ab8908c7f60da18c31cc6b3e9da7755", kill_on_drop: false }`
[INFO] [stderr]     Checking 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] [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 0.95s
[INFO] running `Command { std: "docker" "inspect" "fc157e2fd06f4fa408d9f4ff53568dab0ab8908c7f60da18c31cc6b3e9da7755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc157e2fd06f4fa408d9f4ff53568dab0ab8908c7f60da18c31cc6b3e9da7755", kill_on_drop: false }`
[INFO] [stdout] fc157e2fd06f4fa408d9f4ff53568dab0ab8908c7f60da18c31cc6b3e9da7755