[INFO] updating cached repository https://github.com/krisuh/rust-checkers
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46988a60b5285c85d1e193cd193a31f88f37a4c5
[INFO] checking krisuh/rust-checkers against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrisuh%2Frust-checkers" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/krisuh/rust-checkers on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-6/source/Cargo.toml
[INFO] crate git repo https://github.com/krisuh/rust-checkers already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d6d4923ec8e74913201b9fb3c1bdd464db216645c4dd7a3d41c330d52a740e66
[INFO] running `"docker" "start" "-a" "d6d4923ec8e74913201b9fb3c1bdd464db216645c4dd7a3d41c330d52a740e66"`
[INFO] [stderr]     Checking checkers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `height`
[INFO] [stderr]  --> src/game/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     height: u8,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_occupied`
[INFO] [stderr]   --> src/game/mod.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn is_occupied(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `height`
[INFO] [stderr]  --> src/game/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     height: u8,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_occupied`
[INFO] [stderr]   --> src/game/mod.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn is_occupied(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "d6d4923ec8e74913201b9fb3c1bdd464db216645c4dd7a3d41c330d52a740e66"`
[INFO] running `"docker" "rm" "-f" "d6d4923ec8e74913201b9fb3c1bdd464db216645c4dd7a3d41c330d52a740e66"`
[INFO] [stdout] d6d4923ec8e74913201b9fb3c1bdd464db216645c4dd7a3d41c330d52a740e66