[INFO] cloning repository https://github.com/leonmak/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/leonmak/rust-checkers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonmak%2Frust-checkers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonmak%2Frust-checkers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1531d1c0ffea59bd2e641ed8f24faa13b9596cda
[INFO] checking leonmak/rust-checkers against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonmak%2Frust-checkers" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leonmak/rust-checkers on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leonmak/rust-checkers
[INFO] finished tweaking git repo https://github.com/leonmak/rust-checkers
[INFO] tweaked toml for git repo https://github.com/leonmak/rust-checkers written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/leonmak/rust-checkers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dfdedc1e0a5a3b5a484fcc898c4b2979275ba1dfffd801d4b294e8345822efde
[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" "dfdedc1e0a5a3b5a484fcc898c4b2979275ba1dfffd801d4b294e8345822efde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dfdedc1e0a5a3b5a484fcc898c4b2979275ba1dfffd801d4b294e8345822efde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfdedc1e0a5a3b5a484fcc898c4b2979275ba1dfffd801d4b294e8345822efde", kill_on_drop: false }`
[INFO] [stdout] dfdedc1e0a5a3b5a484fcc898c4b2979275ba1dfffd801d4b294e8345822efde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb539e579444181cd7de9be6d8b6b2d908a8f5c4f02db56838b3673e283e6ac2
[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" "bb539e579444181cd7de9be6d8b6b2d908a8f5c4f02db56838b3673e283e6ac2", kill_on_drop: false }`
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking mut_static v5.0.0
[INFO] [stderr]     Checking rustycheckers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `board::Coordinate`
[INFO] [stdout]   --> src/board.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use board::Coordinate;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `get_piece`, `move_piece`
[INFO] [stdout]  --> src/test.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use ::{get_piece, move_piece};
[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 0.99s
[INFO] running `Command { std: "docker" "inspect" "bb539e579444181cd7de9be6d8b6b2d908a8f5c4f02db56838b3673e283e6ac2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb539e579444181cd7de9be6d8b6b2d908a8f5c4f02db56838b3673e283e6ac2", kill_on_drop: false }`
[INFO] [stdout] bb539e579444181cd7de9be6d8b6b2d908a8f5c4f02db56838b3673e283e6ac2