Dec 14 10:32:11.264 INFO testing EthanTheMaster/sudoku_solver against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 10:32:11.264 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:32:11.771 INFO [stdout] dd38d47f2e7dc7e6882fef2adae8d8e856a4e8a3582365537daa706e56a688af
Dec 14 10:32:11.779 INFO running `"docker" "start" "-a" "dd38d47f2e7dc7e6882fef2adae8d8e856a4e8a3582365537daa706e56a688af"`
Dec 14 10:32:13.099 INFO [stderr] usermod: no changes
Dec 14 10:32:13.228 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:13.763 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 14 10:32:13.763 INFO [stderr]    |
Dec 14 10:32:13.763 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 14 10:32:13.763 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:13.763 INFO [stderr]    |
Dec 14 10:32:13.763 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:32:13.763 INFO [stderr] 
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:13.763 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 14 10:32:13.763 INFO [stderr]     |
Dec 14 10:32:13.763 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 14 10:32:13.763 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:13.763 INFO [stderr] 
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:13.763 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 14 10:32:13.763 INFO [stderr]     |
Dec 14 10:32:13.763 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 14 10:32:13.763 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:13.763 INFO [stderr] 
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:13.763 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 14 10:32:13.763 INFO [stderr]     |
Dec 14 10:32:13.763 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 14 10:32:13.763 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:13.763 INFO [stderr] 
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:13.763 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 14 10:32:13.763 INFO [stderr]     |
Dec 14 10:32:13.763 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:13.763 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:13.763 INFO [stderr] 
Dec 14 10:32:13.763 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:13.763 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 14 10:32:13.763 INFO [stderr]     |
Dec 14 10:32:13.763 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:13.764 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:13.764 INFO [stderr] 
Dec 14 10:32:13.764 INFO [stderr] warning: unused variable: `idx`
Dec 14 10:32:13.764 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 14 10:32:13.764 INFO [stderr]    |
Dec 14 10:32:13.764 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 14 10:32:13.764 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 14 10:32:13.764 INFO [stderr] 
Dec 14 10:32:13.764 INFO [stderr] warning: unused variable: `val`
Dec 14 10:32:13.764 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 14 10:32:13.764 INFO [stderr]    |
Dec 14 10:32:13.764 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 14 10:32:13.764 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 14 10:32:13.764 INFO [stderr] 
Dec 14 10:32:13.856 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:32:13.856 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 14 10:32:13.856 INFO [stderr]    |
Dec 14 10:32:13.856 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 14 10:32:13.856 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 14 10:32:13.856 INFO [stderr]    |             |
Dec 14 10:32:13.856 INFO [stderr]    |             help: remove this `mut`
Dec 14 10:32:13.856 INFO [stderr]    |
Dec 14 10:32:13.856 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:32:13.856 INFO [stderr] 
Dec 14 10:32:14.979 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
Dec 14 10:32:14.979 INFO [stderr] su: No module specific data is present
Dec 14 10:32:15.655 INFO running `"docker" "inspect" "dd38d47f2e7dc7e6882fef2adae8d8e856a4e8a3582365537daa706e56a688af"`
Dec 14 10:32:15.949 INFO running `"docker" "rm" "-f" "dd38d47f2e7dc7e6882fef2adae8d8e856a4e8a3582365537daa706e56a688af"`
Dec 14 10:32:16.295 INFO [stdout] dd38d47f2e7dc7e6882fef2adae8d8e856a4e8a3582365537daa706e56a688af
Dec 14 10:32:16.298 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:32:16.888 INFO [stdout] 3875529f97cf4994f026da7651b08b669f5761c2cfdad58d41ec3a1d4a3eb7ab
Dec 14 10:32:16.895 INFO running `"docker" "start" "-a" "3875529f97cf4994f026da7651b08b669f5761c2cfdad58d41ec3a1d4a3eb7ab"`
Dec 14 10:32:18.127 INFO [stderr] usermod: no changes
Dec 14 10:32:18.183 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 14 10:32:18.997 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:18.997 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 14 10:32:18.997 INFO [stderr]    |
Dec 14 10:32:18.997 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 14 10:32:18.997 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:18.997 INFO [stderr]    |
Dec 14 10:32:18.997 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:32:18.997 INFO [stderr] 
Dec 14 10:32:18.997 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:18.997 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 14 10:32:18.997 INFO [stderr]     |
Dec 14 10:32:18.997 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 14 10:32:18.997 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:18.997 INFO [stderr] 
Dec 14 10:32:18.997 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:18.997 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 14 10:32:18.997 INFO [stderr]     |
Dec 14 10:32:18.997 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 14 10:32:18.997 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:18.997 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:19.147 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 14 10:32:19.147 INFO [stderr]     |
Dec 14 10:32:19.147 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 14 10:32:19.147 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:19.147 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 14 10:32:19.147 INFO [stderr]     |
Dec 14 10:32:19.147 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:19.147 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:19.147 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 14 10:32:19.147 INFO [stderr]     |
Dec 14 10:32:19.147 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:19.147 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: unused variable: `idx`
Dec 14 10:32:19.147 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 14 10:32:19.147 INFO [stderr]    |
Dec 14 10:32:19.147 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 14 10:32:19.147 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: unused variable: `val`
Dec 14 10:32:19.147 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 14 10:32:19.147 INFO [stderr]    |
Dec 14 10:32:19.147 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 14 10:32:19.147 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.147 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:32:19.147 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 14 10:32:19.147 INFO [stderr]    |
Dec 14 10:32:19.147 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 14 10:32:19.147 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 14 10:32:19.147 INFO [stderr]    |             |
Dec 14 10:32:19.147 INFO [stderr]    |             help: remove this `mut`
Dec 14 10:32:19.147 INFO [stderr]    |
Dec 14 10:32:19.147 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:32:19.147 INFO [stderr] 
Dec 14 10:32:19.417 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
Dec 14 10:32:19.419 INFO [stderr] su: No module specific data is present
Dec 14 10:32:21.403 INFO running `"docker" "inspect" "3875529f97cf4994f026da7651b08b669f5761c2cfdad58d41ec3a1d4a3eb7ab"`
Dec 14 10:32:21.733 INFO running `"docker" "rm" "-f" "3875529f97cf4994f026da7651b08b669f5761c2cfdad58d41ec3a1d4a3eb7ab"`
Dec 14 10:32:22.043 INFO [stdout] 3875529f97cf4994f026da7651b08b669f5761c2cfdad58d41ec3a1d4a3eb7ab
Dec 14 10:32:22.049 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 10:32:22.607 INFO [stdout] 5e47b2c1ba140ce39a69a2d5df96b21fbf50c9a521d0a5e1cdf90db6be5e0cc4
Dec 14 10:32:22.615 INFO running `"docker" "start" "-a" "5e47b2c1ba140ce39a69a2d5df96b21fbf50c9a521d0a5e1cdf90db6be5e0cc4"`
Dec 14 10:32:24.355 INFO [stderr] usermod: no changes
Dec 14 10:32:24.463 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Dec 14 10:32:24.471 INFO [stderr]      Running /target/debug/deps/sudoku_solver-23afd5eab9b99c9d
Dec 14 10:32:24.479 INFO [stdout] 
Dec 14 10:32:24.479 INFO [stdout] running 0 tests
Dec 14 10:32:24.479 INFO [stdout] 
Dec 14 10:32:24.479 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 10:32:24.479 INFO [stdout] 
Dec 14 10:32:24.487 INFO [stderr] su: No module specific data is present
Dec 14 10:32:25.527 INFO running `"docker" "inspect" "5e47b2c1ba140ce39a69a2d5df96b21fbf50c9a521d0a5e1cdf90db6be5e0cc4"`
Dec 14 10:32:25.788 INFO running `"docker" "rm" "-f" "5e47b2c1ba140ce39a69a2d5df96b21fbf50c9a521d0a5e1cdf90db6be5e0cc4"`
Dec 14 10:32:26.147 INFO [stdout] 5e47b2c1ba140ce39a69a2d5df96b21fbf50c9a521d0a5e1cdf90db6be5e0cc4