Dec 06 14:11:02.986 INFO testing EthanTheMaster/sudoku_solver against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 14:11:02.986 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 14:11:03.408 INFO [stdout] 22d77b0c5d152af7cc537ab11b232e00ffa573e60cf9de297619b51fd2ec81a3
Dec 06 14:11:03.416 INFO running `"docker" "start" "-a" "22d77b0c5d152af7cc537ab11b232e00ffa573e60cf9de297619b51fd2ec81a3"`
Dec 06 14:11:04.773 INFO [stderr] usermod: no changes
Dec 06 14:11:04.826 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 06 14:11:05.328 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:05.328 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 06 14:11:05.328 INFO [stderr]    |
Dec 06 14:11:05.328 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 06 14:11:05.328 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:05.328 INFO [stderr]    |
Dec 06 14:11:05.328 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:05.329 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 06 14:11:05.329 INFO [stderr]     |
Dec 06 14:11:05.329 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 06 14:11:05.329 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:05.329 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 06 14:11:05.329 INFO [stderr]     |
Dec 06 14:11:05.329 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 06 14:11:05.329 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:05.329 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 06 14:11:05.329 INFO [stderr]     |
Dec 06 14:11:05.329 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 06 14:11:05.329 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:05.329 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 06 14:11:05.329 INFO [stderr]     |
Dec 06 14:11:05.329 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:05.329 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:05.329 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 06 14:11:05.329 INFO [stderr]     |
Dec 06 14:11:05.329 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:05.329 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `idx`
Dec 06 14:11:05.329 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 06 14:11:05.329 INFO [stderr]    |
Dec 06 14:11:05.329 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 06 14:11:05.329 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.329 INFO [stderr] warning: unused variable: `val`
Dec 06 14:11:05.329 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 06 14:11:05.329 INFO [stderr]    |
Dec 06 14:11:05.329 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 06 14:11:05.329 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 06 14:11:05.329 INFO [stderr] 
Dec 06 14:11:05.378 INFO [stderr] warning: variable does not need to be mutable
Dec 06 14:11:05.378 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 06 14:11:05.378 INFO [stderr]    |
Dec 06 14:11:05.378 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 06 14:11:05.378 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 06 14:11:05.378 INFO [stderr]    |             |
Dec 06 14:11:05.378 INFO [stderr]    |             help: remove this `mut`
Dec 06 14:11:05.378 INFO [stderr]    |
Dec 06 14:11:05.378 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 14:11:05.378 INFO [stderr] 
Dec 06 14:11:06.492 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
Dec 06 14:11:06.504 INFO [stderr] su: No module specific data is present
Dec 06 14:11:07.154 INFO running `"docker" "inspect" "22d77b0c5d152af7cc537ab11b232e00ffa573e60cf9de297619b51fd2ec81a3"`
Dec 06 14:11:07.396 INFO running `"docker" "rm" "-f" "22d77b0c5d152af7cc537ab11b232e00ffa573e60cf9de297619b51fd2ec81a3"`
Dec 06 14:11:07.759 INFO [stdout] 22d77b0c5d152af7cc537ab11b232e00ffa573e60cf9de297619b51fd2ec81a3
Dec 06 14:11:07.764 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 14:11:08.257 INFO [stdout] 0535870ebcbd9d17a9f528b3995e1ea44584695fd9eb1e4d7b40df11176e18b5
Dec 06 14:11:08.262 INFO running `"docker" "start" "-a" "0535870ebcbd9d17a9f528b3995e1ea44584695fd9eb1e4d7b40df11176e18b5"`
Dec 06 14:11:09.452 INFO [stderr] usermod: no changes
Dec 06 14:11:09.524 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:10.050 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Dec 06 14:11:10.050 INFO [stderr]    |
Dec 06 14:11:10.050 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Dec 06 14:11:10.050 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:10.050 INFO [stderr]    |
Dec 06 14:11:10.050 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:10.050 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Dec 06 14:11:10.050 INFO [stderr]     |
Dec 06 14:11:10.050 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Dec 06 14:11:10.050 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `operation`
Dec 06 14:11:10.050 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Dec 06 14:11:10.050 INFO [stderr]     |
Dec 06 14:11:10.050 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Dec 06 14:11:10.050 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:10.050 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Dec 06 14:11:10.050 INFO [stderr]     |
Dec 06 14:11:10.050 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Dec 06 14:11:10.050 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:10.050 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Dec 06 14:11:10.050 INFO [stderr]     |
Dec 06 14:11:10.050 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:10.050 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `constraint`
Dec 06 14:11:10.050 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Dec 06 14:11:10.050 INFO [stderr]     |
Dec 06 14:11:10.050 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Dec 06 14:11:10.050 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `idx`
Dec 06 14:11:10.050 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Dec 06 14:11:10.050 INFO [stderr]    |
Dec 06 14:11:10.050 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Dec 06 14:11:10.050 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.050 INFO [stderr] warning: unused variable: `val`
Dec 06 14:11:10.050 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Dec 06 14:11:10.050 INFO [stderr]    |
Dec 06 14:11:10.050 INFO [stderr] 37 |             }).map(|(idx, val)| {
Dec 06 14:11:10.050 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Dec 06 14:11:10.050 INFO [stderr] 
Dec 06 14:11:10.104 INFO [stderr] warning: variable does not need to be mutable
Dec 06 14:11:10.104 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Dec 06 14:11:10.104 INFO [stderr]    |
Dec 06 14:11:10.104 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Dec 06 14:11:10.104 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Dec 06 14:11:10.104 INFO [stderr]    |             |
Dec 06 14:11:10.104 INFO [stderr]    |             help: remove this `mut`
Dec 06 14:11:10.104 INFO [stderr]    |
Dec 06 14:11:10.104 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 14:11:10.104 INFO [stderr] 
Dec 06 14:11:10.462 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
Dec 06 14:11:10.464 INFO [stderr] su: No module specific data is present
Dec 06 14:11:11.029 INFO running `"docker" "inspect" "0535870ebcbd9d17a9f528b3995e1ea44584695fd9eb1e4d7b40df11176e18b5"`
Dec 06 14:11:11.292 INFO running `"docker" "rm" "-f" "0535870ebcbd9d17a9f528b3995e1ea44584695fd9eb1e4d7b40df11176e18b5"`
Dec 06 14:11:11.568 INFO [stdout] 0535870ebcbd9d17a9f528b3995e1ea44584695fd9eb1e4d7b40df11176e18b5
Dec 06 14:11:11.576 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-4/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 14:11:12.011 INFO [stdout] 7f684dcc05ebbbf9dfc323dcbc41380aaec92b6e75c4c5882b355194db44a47c
Dec 06 14:11:12.020 INFO running `"docker" "start" "-a" "7f684dcc05ebbbf9dfc323dcbc41380aaec92b6e75c4c5882b355194db44a47c"`
Dec 06 14:11:13.283 INFO [stderr] usermod: no changes
Dec 06 14:11:13.344 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
Dec 06 14:11:13.366 INFO [stderr]      Running /target/debug/deps/sudoku_solver-e79e4563cf940fb1
Dec 06 14:11:13.372 INFO [stderr] su: No module specific data is present
Dec 06 14:11:13.372 INFO [stdout] 
Dec 06 14:11:13.372 INFO [stdout] running 0 tests
Dec 06 14:11:13.372 INFO [stdout] 
Dec 06 14:11:13.372 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 14:11:13.372 INFO [stdout] 
Dec 06 14:11:14.252 INFO running `"docker" "inspect" "7f684dcc05ebbbf9dfc323dcbc41380aaec92b6e75c4c5882b355194db44a47c"`
Dec 06 14:11:14.516 INFO running `"docker" "rm" "-f" "7f684dcc05ebbbf9dfc323dcbc41380aaec92b6e75c4c5882b355194db44a47c"`
Dec 06 14:11:14.876 INFO [stdout] 7f684dcc05ebbbf9dfc323dcbc41380aaec92b6e75c4c5882b355194db44a47c