[INFO] cloning repository https://github.com/Seymann/chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Seymann/chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSeymann%2Fchess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSeymann%2Fchess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bda19f0a922ffe8163110cb064b64c0cea06f6a
[INFO] building Seymann/chess against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSeymann%2Fchess" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Seymann/chess on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Seymann/chess
[INFO] finished tweaking git repo https://github.com/Seymann/chess
[INFO] tweaked toml for git repo https://github.com/Seymann/chess written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Seymann/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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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 text_io v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1beab088a281d2971661f73e2af9feaedbad5b7f93320c4cacc578d77aea5f3c
[INFO] running `Command { std: "docker" "start" "-a" "1beab088a281d2971661f73e2af9feaedbad5b7f93320c4cacc578d77aea5f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1beab088a281d2971661f73e2af9feaedbad5b7f93320c4cacc578d77aea5f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1beab088a281d2971661f73e2af9feaedbad5b7f93320c4cacc578d77aea5f3c", kill_on_drop: false }`
[INFO] [stdout] 1beab088a281d2971661f73e2af9feaedbad5b7f93320c4cacc578d77aea5f3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5d8c59f7f5a7b0e83f400c374e10f7ab64b1e4f0aa33a25886f9942d8679d18
[INFO] running `Command { std: "docker" "start" "-a" "c5d8c59f7f5a7b0e83f400c374e10f7ab64b1e4f0aa33a25886f9942d8679d18", kill_on_drop: false }`
[INFO] [stderr]    Compiling text_io v0.1.10
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:66
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:85
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                                     ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_board` is never used
[INFO] [stdout]   --> src/chess_game/chess_board.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Positions {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn from_board(board:[[char;8]; 8]) -> Positions {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "c5d8c59f7f5a7b0e83f400c374e10f7ab64b1e4f0aa33a25886f9942d8679d18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5d8c59f7f5a7b0e83f400c374e10f7ab64b1e4f0aa33a25886f9942d8679d18", kill_on_drop: false }`
[INFO] [stdout] c5d8c59f7f5a7b0e83f400c374e10f7ab64b1e4f0aa33a25886f9942d8679d18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 467af95aac516077aec4a488206f779e4b7e88a86957c61f79b683f7294cda08
[INFO] running `Command { std: "docker" "start" "-a" "467af95aac516077aec4a488206f779e4b7e88a86957c61f79b683f7294cda08", kill_on_drop: false }`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:66
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:85
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                                     ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_board` is never used
[INFO] [stdout]   --> src/chess_game/chess_board.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Positions {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn from_board(board:[[char;8]; 8]) -> Positions {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:66
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to`
[INFO] [stdout]   --> src/chess_game/game_logic.rs:90:85
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn can_piece_move(game: &Game, piece: char, end_point: char, from: Coordinates, to: Coordinates) -> Result<(), ChessMoveError>{
[INFO] [stdout]    |                                                                                     ^^ help: if this is intentional, prefix it with an underscore: `_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_board` is never used
[INFO] [stdout]   --> src/chess_game/chess_board.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Positions {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn from_board(board:[[char;8]; 8]) -> Positions {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "467af95aac516077aec4a488206f779e4b7e88a86957c61f79b683f7294cda08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "467af95aac516077aec4a488206f779e4b7e88a86957c61f79b683f7294cda08", kill_on_drop: false }`
[INFO] [stdout] 467af95aac516077aec4a488206f779e4b7e88a86957c61f79b683f7294cda08