[INFO] fetching crate unitig_flipper 0.1.0...
[INFO] building unitig_flipper-0.1.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate unitig_flipper 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate unitig_flipper 0.1.0
[INFO] finished tweaking crates.io crate unitig_flipper 0.1.0
[INFO] tweaked toml for crates.io crate unitig_flipper 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate unitig_flipper 0.1.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate unitig_flipper 0.1.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ex v0.1.3
[INFO] [stderr]   Downloaded clap_complete v4.5.1
[INFO] [stderr]   Downloaded syn v2.0.52
[INFO] [stderr]   Downloaded jseqio v0.1.2
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3f6f756226c92200ee5b5ecb09582db061716a747eec72ebedabc39e7b7577e
[INFO] running `Command { std: "docker" "start" "-a" "e3f6f756226c92200ee5b5ecb09582db061716a747eec72ebedabc39e7b7577e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3f6f756226c92200ee5b5ecb09582db061716a747eec72ebedabc39e7b7577e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f6f756226c92200ee5b5ecb09582db061716a747eec72ebedabc39e7b7577e", kill_on_drop: false }`
[INFO] [stdout] e3f6f756226c92200ee5b5ecb09582db061716a747eec72ebedabc39e7b7577e
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a72d71e0661487c040e23f541c7c5da926d2937973b7bb8521088ce72d357469
[INFO] running `Command { std: "docker" "start" "-a" "a72d71e0661487c040e23f541c7c5da926d2937973b7bb8521088ce72d357469", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling anstyle v1.0.6
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling anstyle-query v1.0.2
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling clap_lex v0.7.0
[INFO] [stderr]    Compiling anstyle-parse v0.2.3
[INFO] [stderr]    Compiling strsim v0.11.0
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling anstream v0.6.13
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling clap_builder v4.5.2
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling ex v0.1.3
[INFO] [stderr]    Compiling flate2 v1.0.28
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling is-terminal v0.4.12
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling jseqio v0.1.2
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.10.3
[INFO] [stderr]    Compiling env_logger v0.10.2
[INFO] [stderr]    Compiling clap_derive v4.5.3
[INFO] [stderr]    Compiling clap v4.5.3
[INFO] [stderr]    Compiling clap_complete v4.5.1
[INFO] [stderr]    Compiling unitig_flipper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/main.rs:69:65
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let n_forward = orientations.iter().fold(0_usize, |acc, &x| (acc + (x == Orientation::Forward) as usize));
[INFO] [stdout]    |                                                                 ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 69 -     let n_forward = orientations.iter().fold(0_usize, |acc, &x| (acc + (x == Orientation::Forward) as usize));
[INFO] [stdout] 69 +     let n_forward = orientations.iter().fold(0_usize, |acc, &x| acc + (x == Orientation::Forward) as usize );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.91s
[INFO] running `Command { std: "docker" "inspect" "a72d71e0661487c040e23f541c7c5da926d2937973b7bb8521088ce72d357469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a72d71e0661487c040e23f541c7c5da926d2937973b7bb8521088ce72d357469", kill_on_drop: false }`
[INFO] [stdout] a72d71e0661487c040e23f541c7c5da926d2937973b7bb8521088ce72d357469
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57f6cf9da34415a6c67c6d2823886f9cd8e8a1c63d1bb12cf6f82dda6eb9a5e6
[INFO] running `Command { std: "docker" "start" "-a" "57f6cf9da34415a6c67c6d2823886f9cd8e8a1c63d1bb12cf6f82dda6eb9a5e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling unitig_flipper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/main.rs:69:65
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let n_forward = orientations.iter().fold(0_usize, |acc, &x| (acc + (x == Orientation::Forward) as usize));
[INFO] [stdout]    |                                                                 ^                                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 69 -     let n_forward = orientations.iter().fold(0_usize, |acc, &x| (acc + (x == Orientation::Forward) as usize));
[INFO] [stdout] 69 +     let n_forward = orientations.iter().fold(0_usize, |acc, &x| acc + (x == Orientation::Forward) as usize );
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufReader`
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |     use std::io::BufReader;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "57f6cf9da34415a6c67c6d2823886f9cd8e8a1c63d1bb12cf6f82dda6eb9a5e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57f6cf9da34415a6c67c6d2823886f9cd8e8a1c63d1bb12cf6f82dda6eb9a5e6", kill_on_drop: false }`
[INFO] [stdout] 57f6cf9da34415a6c67c6d2823886f9cd8e8a1c63d1bb12cf6f82dda6eb9a5e6