[INFO] fetching crate sudoku 0.8.0...
[INFO] testing sudoku-0.8.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate sudoku 0.8.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate sudoku 0.8.0
[INFO] finished tweaking crates.io crate sudoku 0.8.0
[INFO] tweaked toml for crates.io crate sudoku 0.8.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sudoku 0.8.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sudoku 0.8.0 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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41d62b160f53e899718616edaf8f1749d5552464460d5ff9fda529d54f4e7560
[INFO] running `Command { std: "docker" "start" "-a" "41d62b160f53e899718616edaf8f1749d5552464460d5ff9fda529d54f4e7560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41d62b160f53e899718616edaf8f1749d5552464460d5ff9fda529d54f4e7560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41d62b160f53e899718616edaf8f1749d5552464460d5ff9fda529d54f4e7560", kill_on_drop: false }`
[INFO] [stdout] 41d62b160f53e899718616edaf8f1749d5552464460d5ff9fda529d54f4e7560
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21533e06e99b19d89506c780355a1bb89175abaf6d77de24f69c2bd8205f1dfd
[INFO] running `Command { std: "docker" "start" "-a" "21533e06e99b19d89506c780355a1bb89175abaf6d77de24f69c2bd8205f1dfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling sudoku v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `GridState` is never constructed
[INFO] [stdout]  --> src/board/grid_state.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct GridState([CellState; 81]);
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/board/sudoku.rs:728:17
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.15s
[INFO] running `Command { std: "docker" "inspect" "21533e06e99b19d89506c780355a1bb89175abaf6d77de24f69c2bd8205f1dfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21533e06e99b19d89506c780355a1bb89175abaf6d77de24f69c2bd8205f1dfd", kill_on_drop: false }`
[INFO] [stdout] 21533e06e99b19d89506c780355a1bb89175abaf6d77de24f69c2bd8205f1dfd
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd5447da8379c99f6a49b7050343152a0825563fa506aa3998de1f39db9934ce
[INFO] running `Command { std: "docker" "start" "-a" "dd5447da8379c99f6a49b7050343152a0825563fa506aa3998de1f39db9934ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling strum v0.19.5
[INFO] [stdout] warning: struct `GridState` is never constructed
[INFO] [stdout]  --> src/board/grid_state.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct GridState([CellState; 81]);
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/board/sudoku.rs:728:17
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling strum_macros v0.19.4
[INFO] [stderr]    Compiling sudoku v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/board/sudoku.rs:728:17
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter {
[INFO] [stdout]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 728 |     pub fn iter(&self) -> Iter<'_> {
[INFO] [stdout]     |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.41s
[INFO] running `Command { std: "docker" "inspect" "dd5447da8379c99f6a49b7050343152a0825563fa506aa3998de1f39db9934ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd5447da8379c99f6a49b7050343152a0825563fa506aa3998de1f39db9934ce", kill_on_drop: false }`
[INFO] [stdout] dd5447da8379c99f6a49b7050343152a0825563fa506aa3998de1f39db9934ce
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d9875e19cd3d4f1d19e93b81c55817ac7b66112a59226d20d237c352d4578ed5
[INFO] running `Command { std: "docker" "start" "-a" "d9875e19cd3d4f1d19e93b81c55817ac7b66112a59226d20d237c352d4578ed5", kill_on_drop: false }`
[INFO] [stderr] warning: struct `GridState` is never constructed
[INFO] [stderr]  --> src/board/grid_state.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct GridState([CellState; 81]);
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/board/sudoku.rs:728:17
[INFO] [stderr]     |
[INFO] [stderr] 728 |     pub fn iter(&self) -> Iter {
[INFO] [stderr]     |                 ^^^^^     ^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 728 |     pub fn iter(&self) -> Iter<'_> {
[INFO] [stderr]     |                               ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (lib) generated 2 warnings (run `cargo fix --lib -p sudoku` to apply 1 suggestion)
[INFO] [stderr] warning: `sudoku` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sudoku-b45691e204aab91e)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test board::positions::test::col_cells ... ok
[INFO] [stdout] test board::positions::test::row_cells ... ok
[INFO] [stdout] test board::positions::test::unique ... ok
[INFO] [stdout] test strategy::solver::test::grid_state_str_impossible_sudoku ... ok
[INFO] [stdout] test strategy::strategies::xy_wing::test::xy_wing ... ok
[INFO] [stdout] test strategy::strategies::xyz_wing::test::xyz_wing ... ok
[INFO] [stdout] test board::grid_state::grid_state_roundtrip ... ok
[INFO] [stdout] test board::positions::test::band_cells ... ok
[INFO] [stdout] test board::positions::test::stack_cells ... ok
[INFO] [stdout] test board::sudoku::test::test_symmetry_all_cells_equivalent ... ok
[INFO] [stdout] test board::sudoku::test::test_symmetry_composite_symmetries ... ok
[INFO] [stdout] test board::canonicalization::most_canonical_grid_automorphism_count ... ok
[INFO] [stdout] test strategy::solver::test::strategy_solver_correct_solution_medium_sudokus ... ok
[INFO] [stdout] test strategy::solver::test::strategy_solver_correct_solution_easy_sudokus ... ok
[INFO] [stdout] test strategy::solver::test::roundtrip_grid_state_str ... ok
[INFO] [stdout] test board::canonicalization::transformation_from_struct ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/lib.rs (/opt/rustwide/target/debug/deps/lib-9d2b36dec97f6d34)
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test from_str_line_with_comment ... ok
[INFO] [stdout] test from_str_line_too_short ... ok
[INFO] [stdout] test correct_solution_easy_sudokus ... ok
[INFO] [stdout] test correct_solution_medium_sudokus ... ok
[INFO] [stdout] test solve_1 ... ok
[INFO] [stdout] test readme ... ok
[INFO] [stdout] test is_solved_on_unsolved ... ok
[INFO] [stdout] test is_solved_on_solved ... ok
[INFO] [stdout] test parse_permissive ... ok
[INFO] [stdout] test solutionless_sudokus ... ok
[INFO] [stdout] test solve_2 ... ok
[INFO] [stdout] test shuffle_unsolved ... ok
[INFO] [stdout] test shuffle_solved ... ok
[INFO] [stdout] test solution_multiple_solutions - should panic ... ok
[INFO] [stdout] test wrong_format_1 - should panic ... ok
[INFO] [stdout] test correct_solution_hard_sudokus ... ok
[INFO] [stdout] test generate_sudoku_uniqueness ... ok
[INFO] [stdout] test generate_solved_sudoku_correctness ... ok
[INFO] [stdout] test canonicalize ... ok
[INFO] [stdout] test canonicalize_idempotency ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.44s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sudoku
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/board/sudoku.rs - board::sudoku::Sudoku::display_block (line 770) ... ok
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/board/sudoku.rs - board::sudoku::Sudoku::to_str_line (line 741) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.50s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d9875e19cd3d4f1d19e93b81c55817ac7b66112a59226d20d237c352d4578ed5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9875e19cd3d4f1d19e93b81c55817ac7b66112a59226d20d237c352d4578ed5", kill_on_drop: false }`
[INFO] [stdout] d9875e19cd3d4f1d19e93b81c55817ac7b66112a59226d20d237c352d4578ed5
