[INFO] cloning repository https://github.com/madelyneriksen/life-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/madelyneriksen/life-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadelyneriksen%2Flife-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadelyneriksen%2Flife-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e8979103b9d6e4037baaf8fb95f72e511d38f49
[INFO] checking madelyneriksen/life-in-rust against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadelyneriksen%2Flife-in-rust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/madelyneriksen/life-in-rust on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/madelyneriksen/life-in-rust
[INFO] finished tweaking git repo https://github.com/madelyneriksen/life-in-rust
[INFO] tweaked toml for git repo https://github.com/madelyneriksen/life-in-rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/madelyneriksen/life-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef0e9a52726db1e19d470dfa9ded5a537496e363b9fdc490a2ec77f3ba2d95dc
[INFO] running `Command { std: "docker" "start" "-a" "ef0e9a52726db1e19d470dfa9ded5a537496e363b9fdc490a2ec77f3ba2d95dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef0e9a52726db1e19d470dfa9ded5a537496e363b9fdc490a2ec77f3ba2d95dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef0e9a52726db1e19d470dfa9ded5a537496e363b9fdc490a2ec77f3ba2d95dc", kill_on_drop: false }`
[INFO] [stdout] ef0e9a52726db1e19d470dfa9ded5a537496e363b9fdc490a2ec77f3ba2d95dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e922b7744e2dfef2ccf2df0c35cfa0a6640599a9779082f2c5ea232a16ba3956
[INFO] running `Command { std: "docker" "start" "-a" "e922b7744e2dfef2ccf2df0c35cfa0a6640599a9779082f2c5ea232a16ba3956", kill_on_drop: false }`
[INFO] [stderr]     Checking conway v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |             &self.board.remove(&cell);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |             let _ = &self.board.remove(&cell);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             &self.board.insert(cell);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let _ = &self.board.insert(cell);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |             &self.board.remove(&cell);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |             let _ = &self.board.remove(&cell);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             &self.board.insert(cell);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let _ = &self.board.insert(cell);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "e922b7744e2dfef2ccf2df0c35cfa0a6640599a9779082f2c5ea232a16ba3956", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e922b7744e2dfef2ccf2df0c35cfa0a6640599a9779082f2c5ea232a16ba3956", kill_on_drop: false }`
[INFO] [stdout] e922b7744e2dfef2ccf2df0c35cfa0a6640599a9779082f2c5ea232a16ba3956