[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#b10dae361a61486cfbdcd3aae3877ee17e00d192 for pr-153912
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvenkateshrajan%2Fchess" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/venkateshrajan/chess on toolchain b10dae361a61486cfbdcd3aae3877ee17e00d192
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b10dae361a61486cfbdcd3aae3877ee17e00d192" "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" "+b10dae361a61486cfbdcd3aae3877ee17e00d192" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-ident v1.0.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b10dae361a61486cfbdcd3aae3877ee17e00d192" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1815d1e78db145e4d51d124d5989c1b462a51bc79da32b54f98825272623052b
[INFO] running `Command { std: "docker" "start" "-a" "1815d1e78db145e4d51d124d5989c1b462a51bc79da32b54f98825272623052b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1815d1e78db145e4d51d124d5989c1b462a51bc79da32b54f98825272623052b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1815d1e78db145e4d51d124d5989c1b462a51bc79da32b54f98825272623052b", kill_on_drop: false }`
[INFO] [stdout] 1815d1e78db145e4d51d124d5989c1b462a51bc79da32b54f98825272623052b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b10dae361a61486cfbdcd3aae3877ee17e00d192" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5b034b3919451361d81f53a6d2b7476e127d9a1fc5991978d6382e88aecd2b8
[INFO] running `Command { std: "docker" "start" "-a" "e5b034b3919451361d81f53a6d2b7476e127d9a1fc5991978d6382e88aecd2b8", kill_on_drop: false }`
[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 0.47s
[INFO] running `Command { std: "docker" "inspect" "e5b034b3919451361d81f53a6d2b7476e127d9a1fc5991978d6382e88aecd2b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5b034b3919451361d81f53a6d2b7476e127d9a1fc5991978d6382e88aecd2b8", kill_on_drop: false }`
[INFO] [stdout] e5b034b3919451361d81f53a6d2b7476e127d9a1fc5991978d6382e88aecd2b8