[INFO] updating cached repository https://github.com/feadoor/rustdoku
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 47628e75b518c226eb34c60841d2c0253782292e
[INFO] checking feadoor/rustdoku against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffeadoor%2Frustdoku" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/feadoor/rustdoku on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/feadoor/rustdoku
[INFO] finished tweaking git repo https://github.com/feadoor/rustdoku
[INFO] tweaked toml for git repo https://github.com/feadoor/rustdoku written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/feadoor/rustdoku already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 92172b5656b7a53cb6ee0bcd9038f90c1637e0e2d8b9c1e660fa9a7db66fe3f6
[INFO] running `"docker" "start" "-a" "92172b5656b7a53cb6ee0bcd9038f90c1637e0e2d8b9c1e660fa9a7db66fe3f6"`
[INFO] [stderr]     Checking itertools v0.5.7
[INFO] [stderr]     Checking rustdoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `count_solutions`
[INFO] [stderr]    --> src/generator/brute_force.rs:731:1
[INFO] [stderr]     |
[INFO] [stderr] 731 | pub fn count_solutions(clues: &[usize]) -> usize {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `for_seed`
[INFO] [stderr]   --> src/generator/patterns.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn for_seed(seed: Puzzle) -> PatternPuzzlesIterator {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_solutions`
[INFO] [stderr]    --> src/generator/brute_force.rs:731:1
[INFO] [stderr]     |
[INFO] [stderr] 731 | pub fn count_solutions(clues: &[usize]) -> usize {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `for_seed`
[INFO] [stderr]   --> src/generator/patterns.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn for_seed(seed: Puzzle) -> PatternPuzzlesIterator {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `meets_criteria`
[INFO] [stderr]  --> src/bin/generate.rs:5:36
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustdoku::analyser::{Criteria, meets_criteria, steps_to_solve};
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `singles`
[INFO] [stderr]   --> src/bin/generate.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let singles = vec![vec![FullHouse, HiddenSingle, NakedSingle]];
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_singles`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `with_xwing`
[INFO] [stderr]   --> src/bin/generate.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let with_xwing = vec![vec![FullHouse, HiddenSingle, NakedSingle], vec![Pointing, Claiming], vec![HiddenSubset(2), NakedSubset(2)], vec![HiddenSubset(3), NakedSubset(3)], vec![Fish(2)]];
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_with_xwing`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `needs_xwing`
[INFO] [stderr]   --> src/bin/generate.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let needs_xwing = Criteria::not_solvable_with(SolveConfiguration::with_strategies(vec![FullHouse, HiddenSingle, NakedSingle, Pointing, Claiming, HiddenSubset(2), NakedSubset(2), HiddenSubset(3), NakedSubset(3)]));
[INFO] [stderr]    |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_needs_xwing`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `meets_criteria`
[INFO] [stderr]  --> src/bin/generate.rs:5:36
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustdoku::analyser::{Criteria, meets_criteria, steps_to_solve};
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `singles`
[INFO] [stderr]   --> src/bin/generate.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let singles = vec![vec![FullHouse, HiddenSingle, NakedSingle]];
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_singles`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `with_xwing`
[INFO] [stderr]   --> src/bin/generate.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let with_xwing = vec![vec![FullHouse, HiddenSingle, NakedSingle], vec![Pointing, Claiming], vec![HiddenSubset(2), NakedSubset(2)], vec![HiddenSubset(3), NakedSubset(3)], vec![Fish(2)]];
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_with_xwing`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `needs_xwing`
[INFO] [stderr]   --> src/bin/generate.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let needs_xwing = Criteria::not_solvable_with(SolveConfiguration::with_strategies(vec![FullHouse, HiddenSingle, NakedSingle, Pointing, Claiming, HiddenSubset(2), NakedSubset(2), HiddenSubset(3), NakedSubset(3)]));
[INFO] [stderr]    |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_needs_xwing`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.85s
[INFO] running `"docker" "inspect" "92172b5656b7a53cb6ee0bcd9038f90c1637e0e2d8b9c1e660fa9a7db66fe3f6"`
[INFO] running `"docker" "rm" "-f" "92172b5656b7a53cb6ee0bcd9038f90c1637e0e2d8b9c1e660fa9a7db66fe3f6"`
[INFO] [stdout] 92172b5656b7a53cb6ee0bcd9038f90c1637e0e2d8b9c1e660fa9a7db66fe3f6