[INFO] cloning repository https://github.com/venkateshrajan/chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/venkateshrajan/chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvenkateshrajan%2Fchess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvenkateshrajan%2Fchess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c911e257f47588fcde707c830396a141ed10ed2f
[INFO] checking venkateshrajan/chess against try#70daa2c0d8eed7066b07966f3c0b0b8622bff4e4 for pr-151539
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvenkateshrajan%2Fchess" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/venkateshrajan/chess
[INFO] finished tweaking git repo https://github.com/venkateshrajan/chess
[INFO] tweaked toml for git repo https://github.com/venkateshrajan/chess written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/venkateshrajan/chess on toolchain 70daa2c0d8eed7066b07966f3c0b0b8622bff4e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+70daa2c0d8eed7066b07966f3c0b0b8622bff4e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/venkateshrajan/chess already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+70daa2c0d8eed7066b07966f3c0b0b8622bff4e4" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+70daa2c0d8eed7066b07966f3c0b0b8622bff4e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 210c3e744a9b8b2a5d4c004ee8f3f9c2e2e16ab983b285f0fbc12c775df8adab
[INFO] running `Command { std: "docker" "start" "-a" "210c3e744a9b8b2a5d4c004ee8f3f9c2e2e16ab983b285f0fbc12c775df8adab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "210c3e744a9b8b2a5d4c004ee8f3f9c2e2e16ab983b285f0fbc12c775df8adab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "210c3e744a9b8b2a5d4c004ee8f3f9c2e2e16ab983b285f0fbc12c775df8adab", kill_on_drop: false }`
[INFO] [stdout] 210c3e744a9b8b2a5d4c004ee8f3f9c2e2e16ab983b285f0fbc12c775df8adab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+70daa2c0d8eed7066b07966f3c0b0b8622bff4e4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37698e931b37ad26a3cf320e2decde5f87f9d7cca133deaa80ab27f2b5b358a7
[INFO] running `Command { std: "docker" "start" "-a" "37698e931b37ad26a3cf320e2decde5f87f9d7cca133deaa80ab27f2b5b358a7", kill_on_drop: false }`
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `winner`
[INFO] [stdout]   --> src/ui.rs:35:27
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn show_winner(&self, winner: bool) {
[INFO] [stdout]    |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_winner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Engine` is never used
[INFO] [stdout]  --> src/engine.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Engine {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_valid_move` is never used
[INFO] [stdout]   --> src/engine.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<'a> ConsoleEngine<'a> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn is_valid_move(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `show_winner` is never used
[INFO] [stdout]  --> src/ui.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait UI {
[INFO] [stdout]   |           -- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn show_winner(&self, winner: bool);
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pretty_assertions v1.3.0
[INFO] [stdout] warning: unused variable: `winner`
[INFO] [stdout]   --> src/ui.rs:35:27
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn show_winner(&self, winner: bool) {
[INFO] [stdout]    |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_winner`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Engine` is never used
[INFO] [stdout]  --> src/engine.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Engine {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_valid_move` is never used
[INFO] [stdout]   --> src/engine.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<'a> ConsoleEngine<'a> {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn is_valid_move(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `show_winner` is never used
[INFO] [stdout]  --> src/ui.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait UI {
[INFO] [stdout]   |           -- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn show_winner(&self, winner: bool);
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "37698e931b37ad26a3cf320e2decde5f87f9d7cca133deaa80ab27f2b5b358a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37698e931b37ad26a3cf320e2decde5f87f9d7cca133deaa80ab27f2b5b358a7", kill_on_drop: false }`
[INFO] [stdout] 37698e931b37ad26a3cf320e2decde5f87f9d7cca133deaa80ab27f2b5b358a7