Dec 14 10:32:11.604 INFO testing EthanTheMaster/sudoku_solver against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 10:32:11.604 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 10:32:11.978 INFO [stdout] 19425eaa79165427e515baf3c04c2564c08500ecaae381d1b1f523a15e75a43c
Dec 14 10:32:11.985 INFO running `"docker" "start" "-a" "19425eaa79165427e515baf3c04c2564c08500ecaae381d1b1f523a15e75a43c"`
Dec 14 10:32:13.380 INFO [stderr] usermod: no changes
Dec 14 10:32:13.435 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 14 10:32:14.175 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:14.175 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 14 10:32:14.175 INFO [stderr]    |
Dec 14 10:32:14.175 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 14 10:32:14.175 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:14.175 INFO [stderr]    |
Dec 14 10:32:14.175 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:32:14.175 INFO [stderr] 
Dec 14 10:32:14.175 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:14.175 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 14 10:32:14.175 INFO [stderr]     |
Dec 14 10:32:14.175 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 14 10:32:14.175 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:14.175 INFO [stderr] 
Dec 14 10:32:14.175 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:14.175 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 14 10:32:14.175 INFO [stderr]     |
Dec 14 10:32:14.175 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 14 10:32:14.175 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:14.175 INFO [stderr] 
Dec 14 10:32:14.175 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:14.175 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 14 10:32:14.175 INFO [stderr]     |
Dec 14 10:32:14.175 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 14 10:32:14.175 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:14.175 INFO [stderr] 
Dec 14 10:32:14.175 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:14.175 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 14 10:32:14.175 INFO [stderr]     |
Dec 14 10:32:14.175 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:14.175 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:14.175 INFO [stderr] 
Dec 14 10:32:14.176 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:14.176 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 14 10:32:14.176 INFO [stderr]     |
Dec 14 10:32:14.176 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:14.176 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:14.176 INFO [stderr] 
Dec 14 10:32:14.176 INFO [stderr] warning: unused variable: `idx`
Dec 14 10:32:14.176 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 14 10:32:14.176 INFO [stderr]    |
Dec 14 10:32:14.176 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 14 10:32:14.176 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 14 10:32:14.176 INFO [stderr] 
Dec 14 10:32:14.176 INFO [stderr] warning: unused variable: `val`
Dec 14 10:32:14.176 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 14 10:32:14.176 INFO [stderr]    |
Dec 14 10:32:14.176 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 14 10:32:14.176 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 14 10:32:14.176 INFO [stderr] 
Dec 14 10:32:14.247 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:32:14.250 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 14 10:32:14.250 INFO [stderr]    |
Dec 14 10:32:14.251 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 14 10:32:14.251 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 14 10:32:14.251 INFO [stderr]    |             |
Dec 14 10:32:14.251 INFO [stderr]    |             help: remove this `mut`
Dec 14 10:32:14.251 INFO [stderr]    |
Dec 14 10:32:14.251 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:32:14.251 INFO [stderr] 
Dec 14 10:32:15.298 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
Dec 14 10:32:15.304 INFO [stderr] su: No module specific data is present
Dec 14 10:32:15.864 INFO running `"docker" "inspect" "19425eaa79165427e515baf3c04c2564c08500ecaae381d1b1f523a15e75a43c"`
Dec 14 10:32:16.207 INFO running `"docker" "rm" "-f" "19425eaa79165427e515baf3c04c2564c08500ecaae381d1b1f523a15e75a43c"`
Dec 14 10:32:16.519 INFO [stdout] 19425eaa79165427e515baf3c04c2564c08500ecaae381d1b1f523a15e75a43c
Dec 14 10:32:16.526 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 10:32:16.978 INFO [stdout] 52179c3b91e901660c3cfa58e92c7392dbe12db5610335d87b03d84f6f41d082
Dec 14 10:32:16.983 INFO running `"docker" "start" "-a" "52179c3b91e901660c3cfa58e92c7392dbe12db5610335d87b03d84f6f41d082"`
Dec 14 10:32:17.992 INFO [stderr] usermod: no changes
Dec 14 10:32:18.055 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:18.743 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 14 10:32:18.743 INFO [stderr]    |
Dec 14 10:32:18.743 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 14 10:32:18.743 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:18.743 INFO [stderr]    |
Dec 14 10:32:18.743 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:18.743 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 14 10:32:18.743 INFO [stderr]     |
Dec 14 10:32:18.743 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 14 10:32:18.743 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `operation`
Dec 14 10:32:18.743 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 14 10:32:18.743 INFO [stderr]     |
Dec 14 10:32:18.743 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 14 10:32:18.743 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:18.743 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 14 10:32:18.743 INFO [stderr]     |
Dec 14 10:32:18.743 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 14 10:32:18.743 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:18.743 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 14 10:32:18.743 INFO [stderr]     |
Dec 14 10:32:18.743 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:18.743 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `constraint`
Dec 14 10:32:18.743 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 14 10:32:18.743 INFO [stderr]     |
Dec 14 10:32:18.743 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 14 10:32:18.743 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `idx`
Dec 14 10:32:18.743 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 14 10:32:18.743 INFO [stderr]    |
Dec 14 10:32:18.743 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 14 10:32:18.743 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.743 INFO [stderr] warning: unused variable: `val`
Dec 14 10:32:18.743 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 14 10:32:18.743 INFO [stderr]    |
Dec 14 10:32:18.743 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 14 10:32:18.743 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 14 10:32:18.743 INFO [stderr] 
Dec 14 10:32:18.795 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:32:18.795 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 14 10:32:18.795 INFO [stderr]    |
Dec 14 10:32:18.795 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 14 10:32:18.795 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 14 10:32:18.795 INFO [stderr]    |             |
Dec 14 10:32:18.795 INFO [stderr]    |             help: remove this `mut`
Dec 14 10:32:18.795 INFO [stderr]    |
Dec 14 10:32:18.795 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 14 10:32:18.795 INFO [stderr] 
Dec 14 10:32:19.291 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
Dec 14 10:32:19.291 INFO [stderr] su: No module specific data is present
Dec 14 10:32:21.373 INFO running `"docker" "inspect" "52179c3b91e901660c3cfa58e92c7392dbe12db5610335d87b03d84f6f41d082"`
Dec 14 10:32:21.633 INFO running `"docker" "rm" "-f" "52179c3b91e901660c3cfa58e92c7392dbe12db5610335d87b03d84f6f41d082"`
Dec 14 10:32:21.890 INFO [stdout] 52179c3b91e901660c3cfa58e92c7392dbe12db5610335d87b03d84f6f41d082
Dec 14 10:32:21.897 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 10:32:22.532 INFO [stdout] b92246608eca105a0bf647fe178c2c04e50b58d7392293c7ccbe63114b9cf1a7
Dec 14 10:32:22.535 INFO running `"docker" "start" "-a" "b92246608eca105a0bf647fe178c2c04e50b58d7392293c7ccbe63114b9cf1a7"`
Dec 14 10:32:24.535 INFO [stderr] usermod: no changes
Dec 14 10:32:24.577 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 14 10:32:24.577 INFO [stderr]      Running /target/debug/deps/sudoku_solver-26f55f067faaea5d
Dec 14 10:32:24.584 INFO [stdout] 
Dec 14 10:32:24.584 INFO [stdout] running 0 tests
Dec 14 10:32:24.584 INFO [stdout] 
Dec 14 10:32:24.584 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 14 10:32:24.584 INFO [stdout] 
Dec 14 10:32:24.587 INFO [stderr] su: No module specific data is present
Dec 14 10:32:25.781 INFO running `"docker" "inspect" "b92246608eca105a0bf647fe178c2c04e50b58d7392293c7ccbe63114b9cf1a7"`
Dec 14 10:32:26.117 INFO running `"docker" "rm" "-f" "b92246608eca105a0bf647fe178c2c04e50b58d7392293c7ccbe63114b9cf1a7"`
Dec 14 10:32:26.471 INFO [stdout] b92246608eca105a0bf647fe178c2c04e50b58d7392293c7ccbe63114b9cf1a7