[INFO] cloning repository https://github.com/krisuh/rust-checkers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/krisuh/rust-checkers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrisuh%2Frust-checkers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrisuh%2Frust-checkers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 46988a60b5285c85d1e193cd193a31f88f37a4c5
[INFO] checking krisuh/rust-checkers against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrisuh%2Frust-checkers" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/krisuh/rust-checkers on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/krisuh/rust-checkers
[INFO] finished tweaking git repo https://github.com/krisuh/rust-checkers
[INFO] tweaked toml for git repo https://github.com/krisuh/rust-checkers written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/krisuh/rust-checkers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37dd2ae75c9c6120a365c9df919c95c7060d121c84a5475232a858f6f6394cb6
[INFO] running `Command { std: "docker" "start" "-a" "37dd2ae75c9c6120a365c9df919c95c7060d121c84a5475232a858f6f6394cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37dd2ae75c9c6120a365c9df919c95c7060d121c84a5475232a858f6f6394cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37dd2ae75c9c6120a365c9df919c95c7060d121c84a5475232a858f6f6394cb6", kill_on_drop: false }`
[INFO] [stdout] 37dd2ae75c9c6120a365c9df919c95c7060d121c84a5475232a858f6f6394cb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2a4bdda7140bb6f01f7a973d7c6586b2dd8da2f8cc74cbf0061591b6781cec3
[INFO] running `Command { std: "docker" "start" "-a" "e2a4bdda7140bb6f01f7a973d7c6586b2dd8da2f8cc74cbf0061591b6781cec3", kill_on_drop: false }`
[INFO] [stderr]     Checking checkers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]  --> src/game/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     height: u8,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_occupied`
[INFO] [stdout]   --> src/game/mod.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn is_occupied(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]  --> src/game/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     height: u8,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_occupied`
[INFO] [stdout]   --> src/game/mod.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn is_occupied(&self) -> bool {
[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 0.18s
[INFO] running `Command { std: "docker" "inspect" "e2a4bdda7140bb6f01f7a973d7c6586b2dd8da2f8cc74cbf0061591b6781cec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2a4bdda7140bb6f01f7a973d7c6586b2dd8da2f8cc74cbf0061591b6781cec3", kill_on_drop: false }`
[INFO] [stdout] e2a4bdda7140bb6f01f7a973d7c6586b2dd8da2f8cc74cbf0061591b6781cec3