[INFO] fetching crate pngcheck 0.1.1...
[INFO] testing pngcheck-0.1.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate pngcheck 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate pngcheck 0.1.1
[INFO] finished tweaking crates.io crate pngcheck 0.1.1
[INFO] tweaked toml for crates.io crate pngcheck 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pngcheck 0.1.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pngcheck 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-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9458a43997b2260fdd445aecc06c8ddf355fd6abccfc39267e06fac74b37925c
[INFO] running `Command { std: "docker" "start" "-a" "9458a43997b2260fdd445aecc06c8ddf355fd6abccfc39267e06fac74b37925c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9458a43997b2260fdd445aecc06c8ddf355fd6abccfc39267e06fac74b37925c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9458a43997b2260fdd445aecc06c8ddf355fd6abccfc39267e06fac74b37925c", kill_on_drop: false }`
[INFO] [stdout] 9458a43997b2260fdd445aecc06c8ddf355fd6abccfc39267e06fac74b37925c
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 051aeb7e624b871c35f1344d56c895e3dc08ab64c3bc7ca74fb20c93656a7424
[INFO] running `Command { std: "docker" "start" "-a" "051aeb7e624b871c35f1344d56c895e3dc08ab64c3bc7ca74fb20c93656a7424", kill_on_drop: false }`
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling pngcheck v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `global_max_error` is never read
[INFO] [stdout]     --> src/main.rs:1106:13
[INFO] [stdout]      |
[INFO] [stdout] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "051aeb7e624b871c35f1344d56c895e3dc08ab64c3bc7ca74fb20c93656a7424", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "051aeb7e624b871c35f1344d56c895e3dc08ab64c3bc7ca74fb20c93656a7424", kill_on_drop: false }`
[INFO] [stdout] 051aeb7e624b871c35f1344d56c895e3dc08ab64c3bc7ca74fb20c93656a7424
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 561b6b5b5c85b9a1f6f14128e78d8221f79b61d499ccf6f2bf0c510662ff9570
[INFO] running `Command { std: "docker" "start" "-a" "561b6b5b5c85b9a1f6f14128e78d8221f79b61d499ccf6f2bf0c510662ff9570", kill_on_drop: false }`
[INFO] [stderr]    Compiling pngcheck v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `global_max_error` is never read
[INFO] [stdout]     --> src/main.rs:1106:13
[INFO] [stdout]      |
[INFO] [stdout] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "561b6b5b5c85b9a1f6f14128e78d8221f79b61d499ccf6f2bf0c510662ff9570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "561b6b5b5c85b9a1f6f14128e78d8221f79b61d499ccf6f2bf0c510662ff9570", kill_on_drop: false }`
[INFO] [stdout] 561b6b5b5c85b9a1f6f14128e78d8221f79b61d499ccf6f2bf0c510662ff9570
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c6d1c1cf57486f0cbccf9a980b2adfe88c37f96c37b78f4d50d70b9bfb4c2096
[INFO] running `Command { std: "docker" "start" "-a" "c6d1c1cf57486f0cbccf9a980b2adfe88c37f96c37b78f4d50d70b9bfb4c2096", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `global_max_error` is never read
[INFO] [stderr]     --> src/main.rs:1106:13
[INFO] [stderr]      |
[INFO] [stderr] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = help: maybe it is overwritten before being read?
[INFO] [stderr]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `pngcheck` (bin "pngcheck" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/pngcheck-0af102b9d7e67fc4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c6d1c1cf57486f0cbccf9a980b2adfe88c37f96c37b78f4d50d70b9bfb4c2096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6d1c1cf57486f0cbccf9a980b2adfe88c37f96c37b78f4d50d70b9bfb4c2096", kill_on_drop: false }`
[INFO] [stdout] c6d1c1cf57486f0cbccf9a980b2adfe88c37f96c37b78f4d50d70b9bfb4c2096