[INFO] fetching crate u4 0.1.2...
[INFO] testing u4-0.1.2 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate u4 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate u4 0.1.2
[INFO] finished tweaking crates.io crate u4 0.1.2
[INFO] tweaked toml for crates.io crate u4 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate u4 0.1.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 22 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.13.0 (available: v0.14.0)
[INFO] [stderr]       Adding zerocopy v0.7.35 (available: v0.8.27)
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2e3de1f7dcf4fbbb19446370459ad2543a4767fb2c53dd64822690a9c237e1e9
[INFO] running `Command { std: "docker" "start" "-a" "2e3de1f7dcf4fbbb19446370459ad2543a4767fb2c53dd64822690a9c237e1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e3de1f7dcf4fbbb19446370459ad2543a4767fb2c53dd64822690a9c237e1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e3de1f7dcf4fbbb19446370459ad2543a4767fb2c53dd64822690a9c237e1e9", kill_on_drop: false }`
[INFO] [stdout] 2e3de1f7dcf4fbbb19446370459ad2543a4767fb2c53dd64822690a9c237e1e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 989f31169a860cc926ae1dd0470837cde8e41d63b8fb390c93d519bfba854b12
[INFO] running `Command { std: "docker" "start" "-a" "989f31169a860cc926ae1dd0470837cde8e41d63b8fb390c93d519bfba854b12", kill_on_drop: false }`
[INFO] [stderr]    Compiling u4 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `forward`
[INFO] [stdout]    --> src/lib.rs:880:16
[INFO] [stdout]     |
[INFO] [stdout] 880 | pub(crate) use forward;
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backward`
[INFO] [stdout]    --> src/lib.rs:889:16
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub(crate) use backward;
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "989f31169a860cc926ae1dd0470837cde8e41d63b8fb390c93d519bfba854b12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "989f31169a860cc926ae1dd0470837cde8e41d63b8fb390c93d519bfba854b12", kill_on_drop: false }`
[INFO] [stdout] 989f31169a860cc926ae1dd0470837cde8e41d63b8fb390c93d519bfba854b12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] abd895e76d94a383022e2868a8c0c3a8920f5b7c79d0d8f6fe10e26b7421c5c6
[INFO] running `Command { std: "docker" "start" "-a" "abd895e76d94a383022e2868a8c0c3a8920f5b7c79d0d8f6fe10e26b7421c5c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stdout] warning: unused import: `forward`
[INFO] [stdout]    --> src/lib.rs:880:16
[INFO] [stdout]     |
[INFO] [stdout] 880 | pub(crate) use forward;
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backward`
[INFO] [stdout]    --> src/lib.rs:889:16
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub(crate) use backward;
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling u4 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `forward`
[INFO] [stdout]    --> src/lib.rs:880:16
[INFO] [stdout]     |
[INFO] [stdout] 880 | pub(crate) use forward;
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backward`
[INFO] [stdout]    --> src/lib.rs:889:16
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub(crate) use backward;
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.45s
[INFO] running `Command { std: "docker" "inspect" "abd895e76d94a383022e2868a8c0c3a8920f5b7c79d0d8f6fe10e26b7421c5c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abd895e76d94a383022e2868a8c0c3a8920f5b7c79d0d8f6fe10e26b7421c5c6", kill_on_drop: false }`
[INFO] [stdout] abd895e76d94a383022e2868a8c0c3a8920f5b7c79d0d8f6fe10e26b7421c5c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ebc3dbbc66d195bd19454a584d468877032c10074ac92836b721230aec662560
[INFO] running `Command { std: "docker" "start" "-a" "ebc3dbbc66d195bd19454a584d468877032c10074ac92836b721230aec662560", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `forward`
[INFO] [stderr]    --> src/lib.rs:880:16
[INFO] [stderr]     |
[INFO] [stderr] 880 | pub(crate) use forward;
[INFO] [stderr]     |                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `backward`
[INFO] [stderr]    --> src/lib.rs:889:16
[INFO] [stderr]     |
[INFO] [stderr] 889 | pub(crate) use backward;
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `u4` (lib) generated 2 warnings (run `cargo fix --lib -p u4` to apply 2 suggestions)
[INFO] [stderr] warning: `u4` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/u4-a50231344486db78)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test new_ref ... ok
[INFO] [stdout] test test_pos_overflow ... ok
[INFO] [stdout] test binops ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests u4
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test src/lib.rs - U4x2::right (line 589) ... ok
[INFO] [stdout] test src/lib.rs - U4::truncate (line 204) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::len (line 759) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::iter (line 789) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::set_right (line 670) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::reverse (line 846) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::pack_from_slice (line 824) ... ok
[INFO] [stdout] test src/lib.rs - U4::new (line 159) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::with_left (line 628) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::set_left (line 642) ... ok
[INFO] [stdout] test src/lib.rs - U4 (line 491) ... ok
[INFO] [stdout] test src/lib.rs - U4 (line 461) ... ok
[INFO] [stdout] test src/lib.rs - U4 (line 446) ... ok
[INFO] [stdout] test src/lib.rs - U4 (line 506) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::set (line 805) ... ok
[INFO] [stdout] test src/lib.rs - u4 (line 124) - compile fail ... ok
[INFO] [stdout] test src/lib.rs - U4 (line 476) ... ok
[INFO] [stdout] test src/lib.rs - AsNibbles<T>::get (line 775) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::left (line 578) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::with_right (line 656) ... ok
[INFO] [stdout] test src/lib.rs - u4 (line 120) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::swap (line 600) ... ok
[INFO] [stdout] test src/lib.rs - U4x2::swapped (line 613) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.20s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ebc3dbbc66d195bd19454a584d468877032c10074ac92836b721230aec662560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebc3dbbc66d195bd19454a584d468877032c10074ac92836b721230aec662560", kill_on_drop: false }`
[INFO] [stdout] ebc3dbbc66d195bd19454a584d468877032c10074ac92836b721230aec662560