[INFO] cloning repository https://github.com/barbariand/rust_chess_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/barbariand/rust_chess_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbarbariand%2Frust_chess_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbarbariand%2Frust_chess_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 27092fec2cd36617c7e56d1330e6fd4e0049fb1e
[INFO] building barbariand/rust_chess_engine 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%2Fbarbariand%2Frust_chess_engine" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/barbariand/rust_chess_engine 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/barbariand/rust_chess_engine
[INFO] finished tweaking git repo https://github.com/barbariand/rust_chess_engine
[INFO] tweaked toml for git repo https://github.com/barbariand/rust_chess_engine written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/barbariand/rust_chess_engine 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a570ac6c3b3f20d3365cf1d291ef10e0be5dbd386563b79e73d2aaa51c36ea14
[INFO] running `Command { std: "docker" "start" "-a" "a570ac6c3b3f20d3365cf1d291ef10e0be5dbd386563b79e73d2aaa51c36ea14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a570ac6c3b3f20d3365cf1d291ef10e0be5dbd386563b79e73d2aaa51c36ea14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a570ac6c3b3f20d3365cf1d291ef10e0be5dbd386563b79e73d2aaa51c36ea14", kill_on_drop: false }`
[INFO] [stdout] a570ac6c3b3f20d3365cf1d291ef10e0be5dbd386563b79e73d2aaa51c36ea14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1900d89842c2129a03565a71de6daf2e007a0611f4bf1eec40665e483bd9a204
[INFO] running `Command { std: "docker" "start" "-a" "1900d89842c2129a03565a71de6daf2e007a0611f4bf1eec40665e483bd9a204", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusttesting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `str::FromStr`
[INFO] [stdout]  --> src/chess_engine/board/file.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     str::FromStr,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `str::FromStr`
[INFO] [stdout]  --> src/chess_engine/board/rank.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{ops::{Add, Sub}, str::FromStr};
[INFO] [stdout]   |                            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/chess_engine/pieces/mod.rs:1:55
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{board::{Board, BoardPosition, MoveOffset, self}, errors::{Error, ActionError}};
[INFO] [stdout]   |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/chess_engine/history/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `turn` is never read
[INFO] [stdout]   --> src/chess_engine/board/board.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Board {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 16 |     inner_board: [BoardRank; 8],
[INFO] [stdout] 17 |     turn: Color,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Board` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "1900d89842c2129a03565a71de6daf2e007a0611f4bf1eec40665e483bd9a204", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1900d89842c2129a03565a71de6daf2e007a0611f4bf1eec40665e483bd9a204", kill_on_drop: false }`
[INFO] [stdout] 1900d89842c2129a03565a71de6daf2e007a0611f4bf1eec40665e483bd9a204
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 918a8465be336e00d311471aebcac0fd16da3ab2384723fa9fa2d7e6b96059c2
[INFO] running `Command { std: "docker" "start" "-a" "918a8465be336e00d311471aebcac0fd16da3ab2384723fa9fa2d7e6b96059c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusttesting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `str::FromStr`
[INFO] [stdout]  --> src/chess_engine/board/file.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     str::FromStr,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `str::FromStr`
[INFO] [stdout]  --> src/chess_engine/board/rank.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{ops::{Add, Sub}, str::FromStr};
[INFO] [stdout]   |                            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/chess_engine/pieces/mod.rs:1:55
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{board::{Board, BoardPosition, MoveOffset, self}, errors::{Error, ActionError}};
[INFO] [stdout]   |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/chess_engine/history/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `turn` is never read
[INFO] [stdout]   --> src/chess_engine/board/board.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Board {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 16 |     inner_board: [BoardRank; 8],
[INFO] [stdout] 17 |     turn: Color,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Board` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "918a8465be336e00d311471aebcac0fd16da3ab2384723fa9fa2d7e6b96059c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "918a8465be336e00d311471aebcac0fd16da3ab2384723fa9fa2d7e6b96059c2", kill_on_drop: false }`
[INFO] [stdout] 918a8465be336e00d311471aebcac0fd16da3ab2384723fa9fa2d7e6b96059c2