[INFO] cloning repository https://github.com/Catman155/four-in-a-row
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Catman155/four-in-a-row" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCatman155%2Ffour-in-a-row", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCatman155%2Ffour-in-a-row'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 057c1a1df18fea122ba7b7e0fc3731c2dc1b24c9
[INFO] checking Catman155/four-in-a-row against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCatman155%2Ffour-in-a-row" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Catman155/four-in-a-row on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Catman155/four-in-a-row
[INFO] finished tweaking git repo https://github.com/Catman155/four-in-a-row
[INFO] tweaked toml for git repo https://github.com/Catman155/four-in-a-row written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/Catman155/four-in-a-row already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--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-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27aeeb7a92b9efe95f41d13f5bf0578d39b7441ad8892b5940eb5caac3171069
[INFO] running `Command { std: "docker" "start" "-a" "27aeeb7a92b9efe95f41d13f5bf0578d39b7441ad8892b5940eb5caac3171069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27aeeb7a92b9efe95f41d13f5bf0578d39b7441ad8892b5940eb5caac3171069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27aeeb7a92b9efe95f41d13f5bf0578d39b7441ad8892b5940eb5caac3171069", kill_on_drop: false }`
[INFO] [stdout] 27aeeb7a92b9efe95f41d13f5bf0578d39b7441ad8892b5940eb5caac3171069
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb407651bac915b2ccfcef8c54f4e09e3dadfac3cb6bbb286fe3dc5504ef57ee
[INFO] running `Command { std: "docker" "start" "-a" "fb407651bac915b2ccfcef8c54f4e09e3dadfac3cb6bbb286fe3dc5504ef57ee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rprompt v1.0.3
[INFO] [stderr]     Checking four_in_a_row v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BOARD_SIZE`
[INFO] [stdout]  --> src/objects/ai.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use BOARD_SIZE;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BOARD_SIZE`
[INFO] [stdout]  --> src/objects/ai.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use BOARD_SIZE;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `direction`
[INFO] [stdout]   --> src/objects/ai.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let direction = self.get_possible_directions(positions);
[INFO] [stdout]    |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_direction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/objects/ai.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut possible = Vec::<[(i64, i64); 4]>::new();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `direction`
[INFO] [stdout]   --> src/objects/ai.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let direction = self.get_possible_directions(positions);
[INFO] [stdout]    |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_direction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/objects/ai.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut possible = Vec::<[(i64, i64); 4]>::new();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.27s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fb407651bac915b2ccfcef8c54f4e09e3dadfac3cb6bbb286fe3dc5504ef57ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb407651bac915b2ccfcef8c54f4e09e3dadfac3cb6bbb286fe3dc5504ef57ee", kill_on_drop: false }`
[INFO] [stdout] fb407651bac915b2ccfcef8c54f4e09e3dadfac3cb6bbb286fe3dc5504ef57ee