[INFO] fetching crate contrast 0.1.1...
[INFO] testing contrast-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate contrast 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate contrast 0.1.1
[INFO] finished tweaking crates.io crate contrast 0.1.1
[INFO] tweaked toml for crates.io crate contrast 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate contrast 0.1.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate contrast 0.1.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cca8f357aeed05bae521bba7c8b6d09d19f1c3cc0770c193c852ce75fc5b0eea
[INFO] running `Command { std: "docker" "start" "-a" "cca8f357aeed05bae521bba7c8b6d09d19f1c3cc0770c193c852ce75fc5b0eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cca8f357aeed05bae521bba7c8b6d09d19f1c3cc0770c193c852ce75fc5b0eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cca8f357aeed05bae521bba7c8b6d09d19f1c3cc0770c193c852ce75fc5b0eea", kill_on_drop: false }`
[INFO] [stdout] cca8f357aeed05bae521bba7c8b6d09d19f1c3cc0770c193c852ce75fc5b0eea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91f854230d1cc3cf533d54de910db3043393ee546c59d2f4ccb84384ff329f7e
[INFO] running `Command { std: "docker" "start" "-a" "91f854230d1cc3cf533d54de910db3043393ee546c59d2f4ccb84384ff329f7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytemuck v1.23.0
[INFO] [stderr]    Compiling rgb v0.8.50
[INFO] [stderr]    Compiling contrast v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "91f854230d1cc3cf533d54de910db3043393ee546c59d2f4ccb84384ff329f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91f854230d1cc3cf533d54de910db3043393ee546c59d2f4ccb84384ff329f7e", kill_on_drop: false }`
[INFO] [stdout] 91f854230d1cc3cf533d54de910db3043393ee546c59d2f4ccb84384ff329f7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d35594a5c5b7d73d6e81b1530fb01b1836f9c390bed10746d24b95645c2d460
[INFO] running `Command { std: "docker" "start" "-a" "0d35594a5c5b7d73d6e81b1530fb01b1836f9c390bed10746d24b95645c2d460", kill_on_drop: false }`
[INFO] [stderr]    Compiling contrast v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "0d35594a5c5b7d73d6e81b1530fb01b1836f9c390bed10746d24b95645c2d460", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d35594a5c5b7d73d6e81b1530fb01b1836f9c390bed10746d24b95645c2d460", kill_on_drop: false }`
[INFO] [stdout] 0d35594a5c5b7d73d6e81b1530fb01b1836f9c390bed10746d24b95645c2d460
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9b09d60c5c23396a799794ab153767f2b2f4fe508c9e8d8ebac8ea141f2bb484
[INFO] running `Command { std: "docker" "start" "-a" "9b09d60c5c23396a799794ab153767f2b2f4fe508c9e8d8ebac8ea141f2bb484", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/contrast-8bd29e140c9fbb24)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_contrast ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests contrast
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - contrast (line 34) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.27s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9b09d60c5c23396a799794ab153767f2b2f4fe508c9e8d8ebac8ea141f2bb484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b09d60c5c23396a799794ab153767f2b2f4fe508c9e8d8ebac8ea141f2bb484", kill_on_drop: false }`
[INFO] [stdout] 9b09d60c5c23396a799794ab153767f2b2f4fe508c9e8d8ebac8ea141f2bb484