[INFO] cloning repository https://github.com/BerserkerMother/rust-chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BerserkerMother/rust-chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerserkerMother%2Frust-chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerserkerMother%2Frust-chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ddd0bf4a197044298352bfcd75a9e2c284436390
[INFO] building BerserkerMother/rust-chess against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBerserkerMother%2Frust-chess" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BerserkerMother/rust-chess on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BerserkerMother/rust-chess
[INFO] finished tweaking git repo https://github.com/BerserkerMother/rust-chess
[INFO] tweaked toml for git repo https://github.com/BerserkerMother/rust-chess written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/BerserkerMother/rust-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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c590b8e54dc497b214d9cc91bf7f71fe263a70eb304f0c1b78099537a40213c9
[INFO] running `Command { std: "docker" "start" "-a" "c590b8e54dc497b214d9cc91bf7f71fe263a70eb304f0c1b78099537a40213c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c590b8e54dc497b214d9cc91bf7f71fe263a70eb304f0c1b78099537a40213c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c590b8e54dc497b214d9cc91bf7f71fe263a70eb304f0c1b78099537a40213c9", kill_on_drop: false }`
[INFO] [stdout] c590b8e54dc497b214d9cc91bf7f71fe263a70eb304f0c1b78099537a40213c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d57846cb9bc2cda083e8e9f69285d169cb2064b644207dc150fbbd66dd0df1f
[INFO] running `Command { std: "docker" "start" "-a" "7d57846cb9bc2cda083e8e9f69285d169cb2064b644207dc150fbbd66dd0df1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/main.rs:54:29
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xs`
[INFO] [stdout]   --> src/main.rs:54:44
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                            ^^ help: if this is intentional, prefix it with an underscore: `_xs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]   --> src/main.rs:54:55
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                       ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xd`
[INFO] [stdout]   --> src/main.rs:54:66
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                                  ^^ help: if this is intentional, prefix it with an underscore: `_xd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `yd`
[INFO] [stdout]   --> src/main.rs:54:77
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                                             ^^ help: if this is intentional, prefix it with an underscore: `_yd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]   --> src/main.rs:73:35
[INFO] [stdout]    |
[INFO] [stdout] 73 |             Some(Position::Filled(piece)) => (),
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char`
[INFO] [stdout]    --> src/main.rs:147:21
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let char = self
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HORIZANTAL_LINE` is never used
[INFO] [stdout]  --> src/main.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const HORIZANTAL_LINE: &str = "_________________"; // 17 _
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |             writeln!(f);
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `$crate::write` which comes from the expansion of the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "7d57846cb9bc2cda083e8e9f69285d169cb2064b644207dc150fbbd66dd0df1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d57846cb9bc2cda083e8e9f69285d169cb2064b644207dc150fbbd66dd0df1f", kill_on_drop: false }`
[INFO] [stdout] 7d57846cb9bc2cda083e8e9f69285d169cb2064b644207dc150fbbd66dd0df1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65f3543cd116ec9bf1f9c4c4388ad1bcd2e6a9f2ed31c550817a36c1f0f0033a
[INFO] running `Command { std: "docker" "start" "-a" "65f3543cd116ec9bf1f9c4c4388ad1bcd2e6a9f2ed31c550817a36c1f0f0033a", kill_on_drop: false }`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/main.rs:54:29
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xs`
[INFO] [stdout]   --> src/main.rs:54:44
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                            ^^ help: if this is intentional, prefix it with an underscore: `_xs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ys`
[INFO] [stdout]   --> src/main.rs:54:55
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                       ^^ help: if this is intentional, prefix it with an underscore: `_ys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xd`
[INFO] [stdout]   --> src/main.rs:54:66
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                                  ^^ help: if this is intentional, prefix it with an underscore: `_xd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `yd`
[INFO] [stdout]   --> src/main.rs:54:77
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn is_valid_move(&self, board: &Board, xs: usize, ys: usize, xd: usize, yd: usize) -> bool {
[INFO] [stdout]    |                                                                             ^^ help: if this is intentional, prefix it with an underscore: `_yd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]   --> src/main.rs:73:35
[INFO] [stdout]    |
[INFO] [stdout] 73 |             Some(Position::Filled(piece)) => (),
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `char`
[INFO] [stdout]    --> src/main.rs:147:21
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let char = self
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HORIZANTAL_LINE` is never used
[INFO] [stdout]  --> src/main.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const HORIZANTAL_LINE: &str = "_________________"; // 17 _
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |             writeln!(f);
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `$crate::write` which comes from the expansion of the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "65f3543cd116ec9bf1f9c4c4388ad1bcd2e6a9f2ed31c550817a36c1f0f0033a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65f3543cd116ec9bf1f9c4c4388ad1bcd2e6a9f2ed31c550817a36c1f0f0033a", kill_on_drop: false }`
[INFO] [stdout] 65f3543cd116ec9bf1f9c4c4388ad1bcd2e6a9f2ed31c550817a36c1f0f0033a
