[INFO] cloning repository https://github.com/mxrr/rust-ant
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mxrr/rust-ant" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxrr%2Frust-ant", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxrr%2Frust-ant'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 678a59f798100aaefa3808300307b27bca27cd0e
[INFO] testing mxrr/rust-ant against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxrr%2Frust-ant" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mxrr/rust-ant on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mxrr/rust-ant
[INFO] finished tweaking git repo https://github.com/mxrr/rust-ant
[INFO] tweaked toml for git repo https://github.com/mxrr/rust-ant written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mxrr/rust-ant already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded csfml-window-sys v0.6.0
[INFO] [stderr]   Downloaded csfml-audio-sys v0.6.0
[INFO] [stderr]   Downloaded csfml-system-sys v0.6.0
[INFO] [stderr]   Downloaded csfml-graphics-sys v0.6.0
[INFO] [stderr]   Downloaded sfml-build v0.4.0
[INFO] [stderr]   Downloaded sfml v0.16.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e06eb50c3bb251f2868f53e373ee610e56271d226b08acaf57089a4585b30ff6
[INFO] running `Command { std: "docker" "start" "-a" "e06eb50c3bb251f2868f53e373ee610e56271d226b08acaf57089a4585b30ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e06eb50c3bb251f2868f53e373ee610e56271d226b08acaf57089a4585b30ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e06eb50c3bb251f2868f53e373ee610e56271d226b08acaf57089a4585b30ff6", kill_on_drop: false }`
[INFO] [stdout] e06eb50c3bb251f2868f53e373ee610e56271d226b08acaf57089a4585b30ff6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce65ff1d1becd17cc1f6ba411b75d5b757eebcea14ef99f50216af8679833a09
[INFO] running `Command { std: "docker" "start" "-a" "ce65ff1d1becd17cc1f6ba411b75d5b757eebcea14ef99f50216af8679833a09", kill_on_drop: false }`
[INFO] [stderr]    Compiling sfml-build v0.4.0
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling widestring v0.4.3
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling csfml-system-sys v0.6.0
[INFO] [stderr]    Compiling csfml-window-sys v0.6.0
[INFO] [stderr]    Compiling csfml-graphics-sys v0.6.0
[INFO] [stderr]    Compiling csfml-audio-sys v0.6.0
[INFO] [stderr]    Compiling sfml v0.16.0
[INFO] [stderr]    Compiling rusty-ant v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cell_grid.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     &mut self.change_cell_state(idx, Dead);
[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] 186 |                     let _ = &mut self.change_cell_state(idx, Dead);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cell_grid.rs:191:25
[INFO] [stdout]     |
[INFO] [stdout] 191 |                         &mut self.change_cell_state(idx, Alive);
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 191 |                         let _ = &mut self.change_cell_state(idx, Alive);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.82s
[INFO] running `Command { std: "docker" "inspect" "ce65ff1d1becd17cc1f6ba411b75d5b757eebcea14ef99f50216af8679833a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce65ff1d1becd17cc1f6ba411b75d5b757eebcea14ef99f50216af8679833a09", kill_on_drop: false }`
[INFO] [stdout] ce65ff1d1becd17cc1f6ba411b75d5b757eebcea14ef99f50216af8679833a09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d67735c80eb514c7a0dc637874116b719cbed9d48965db0fc1fe2eff85f8974
[INFO] running `Command { std: "docker" "start" "-a" "4d67735c80eb514c7a0dc637874116b719cbed9d48965db0fc1fe2eff85f8974", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-ant v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cell_grid.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     &mut self.change_cell_state(idx, Dead);
[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] 186 |                     let _ = &mut self.change_cell_state(idx, Dead);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cell_grid.rs:191:25
[INFO] [stdout]     |
[INFO] [stdout] 191 |                         &mut self.change_cell_state(idx, Alive);
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 191 |                         let _ = &mut self.change_cell_state(idx, Alive);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "4d67735c80eb514c7a0dc637874116b719cbed9d48965db0fc1fe2eff85f8974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d67735c80eb514c7a0dc637874116b719cbed9d48965db0fc1fe2eff85f8974", kill_on_drop: false }`
[INFO] [stdout] 4d67735c80eb514c7a0dc637874116b719cbed9d48965db0fc1fe2eff85f8974
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 700a68402cc611dde6d47715035aa2dc3774ae4f0f5c8b1b1743c2ea300163d7
[INFO] running `Command { std: "docker" "start" "-a" "700a68402cc611dde6d47715035aa2dc3774ae4f0f5c8b1b1743c2ea300163d7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/cell_grid.rs:186:21
[INFO] [stderr]     |
[INFO] [stderr] 186 |                     &mut self.change_cell_state(idx, Dead);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 186 |                     let _ = &mut self.change_cell_state(idx, Dead);
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/cell_grid.rs:191:25
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         &mut self.change_cell_state(idx, Alive);
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         let _ = &mut self.change_cell_state(idx, Alive);
[INFO] [stderr]     |                         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-ant` (bin "rusty-ant" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 24s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusty_ant-af2b66113f3f0482)
[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" "700a68402cc611dde6d47715035aa2dc3774ae4f0f5c8b1b1743c2ea300163d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "700a68402cc611dde6d47715035aa2dc3774ae4f0f5c8b1b1743c2ea300163d7", kill_on_drop: false }`
[INFO] [stdout] 700a68402cc611dde6d47715035aa2dc3774ae4f0f5c8b1b1743c2ea300163d7