Nov 17 15:33:25.443 INFO testing EthanTheMaster/sudoku_solver against try#2e026d6e5d7621634147ad4c8074f1d964dbb1be for pr-55982
Nov 17 15:33:25.445 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 15:33:25.867 INFO [stdout] 0d09049d6f70b0397043068c1b953a4bd235096e4aeaec9e03fcc9684f4fa5b3
Nov 17 15:33:25.869 INFO running `"docker" "start" "-a" "0d09049d6f70b0397043068c1b953a4bd235096e4aeaec9e03fcc9684f4fa5b3"`
Nov 17 15:33:26.848 INFO [stderr] usermod: no changes
Nov 17 15:33:26.920 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Nov 17 15:33:27.494 INFO [stderr] warning: unused variable: `operation`
Nov 17 15:33:27.494 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 17 15:33:27.494 INFO [stderr]    |
Nov 17 15:33:27.494 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 17 15:33:27.494 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 17 15:33:27.494 INFO [stderr]    |
Nov 17 15:33:27.494 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 17 15:33:27.494 INFO [stderr] 
Nov 17 15:33:27.494 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:27.494 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 17 15:33:27.494 INFO [stderr]     |
Nov 17 15:33:27.494 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 17 15:33:27.494 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:27.494 INFO [stderr] 
Nov 17 15:33:27.494 INFO [stderr] warning: unused variable: `operation`
Nov 17 15:33:27.494 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 17 15:33:27.494 INFO [stderr]     |
Nov 17 15:33:27.494 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Nov 17 15:33:27.494 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 17 15:33:27.494 INFO [stderr] 
Nov 17 15:33:27.494 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:27.494 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 17 15:33:27.494 INFO [stderr]     |
Nov 17 15:33:27.494 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 17 15:33:27.494 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:27.494 INFO [stderr] 
Nov 17 15:33:27.494 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:27.494 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 17 15:33:27.494 INFO [stderr]     |
Nov 17 15:33:27.494 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 17 15:33:27.494 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:27.494 INFO [stderr] 
Nov 17 15:33:27.499 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:27.499 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 17 15:33:27.499 INFO [stderr]     |
Nov 17 15:33:27.500 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 17 15:33:27.500 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:27.500 INFO [stderr] 
Nov 17 15:33:27.500 INFO [stderr] warning: unused variable: `idx`
Nov 17 15:33:27.500 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 17 15:33:27.501 INFO [stderr]    |
Nov 17 15:33:27.501 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Nov 17 15:33:27.501 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Nov 17 15:33:27.501 INFO [stderr] 
Nov 17 15:33:27.501 INFO [stderr] warning: unused variable: `val`
Nov 17 15:33:27.502 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 17 15:33:27.502 INFO [stderr]    |
Nov 17 15:33:27.502 INFO [stderr] 37 |             }).map(|(idx, val)| {
Nov 17 15:33:27.502 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Nov 17 15:33:27.502 INFO [stderr] 
Nov 17 15:33:27.567 INFO [stderr] warning: variable does not need to be mutable
Nov 17 15:33:27.567 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 17 15:33:27.567 INFO [stderr]    |
Nov 17 15:33:27.567 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 17 15:33:27.567 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Nov 17 15:33:27.567 INFO [stderr]    |             |
Nov 17 15:33:27.567 INFO [stderr]    |             help: remove this `mut`
Nov 17 15:33:27.567 INFO [stderr]    |
Nov 17 15:33:27.567 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 15:33:27.567 INFO [stderr] 
Nov 17 15:33:28.503 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
Nov 17 15:33:28.503 INFO [stderr] su: No module specific data is present
Nov 17 15:33:29.181 INFO running `"docker" "inspect" "0d09049d6f70b0397043068c1b953a4bd235096e4aeaec9e03fcc9684f4fa5b3"`
Nov 17 15:33:29.401 INFO running `"docker" "rm" "-f" "0d09049d6f70b0397043068c1b953a4bd235096e4aeaec9e03fcc9684f4fa5b3"`
Nov 17 15:33:29.687 INFO [stdout] 0d09049d6f70b0397043068c1b953a4bd235096e4aeaec9e03fcc9684f4fa5b3
Nov 17 15:33:29.701 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 15:33:30.141 INFO [stdout] 79500327a5ccf96843b3a486b307b83959df5cb61689ea85eca1c6b4f583f7a5
Nov 17 15:33:30.148 INFO running `"docker" "start" "-a" "79500327a5ccf96843b3a486b307b83959df5cb61689ea85eca1c6b4f583f7a5"`
Nov 17 15:33:31.359 INFO [stderr] usermod: no changes
Nov 17 15:33:31.428 INFO [stderr]    Compiling sudoku_solver v0.1.0 (/source)
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `operation`
Nov 17 15:33:32.095 INFO [stderr]   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 17 15:33:32.095 INFO [stderr]    |
Nov 17 15:33:32.095 INFO [stderr] 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 17 15:33:32.095 INFO [stderr]    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 17 15:33:32.095 INFO [stderr]    |
Nov 17 15:33:32.095 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:32.095 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 17 15:33:32.095 INFO [stderr]     |
Nov 17 15:33:32.095 INFO [stderr] 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 17 15:33:32.095 INFO [stderr]     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `operation`
Nov 17 15:33:32.095 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 17 15:33:32.095 INFO [stderr]     |
Nov 17 15:33:32.095 INFO [stderr] 119 |             NodeType::Field(operation, column_header_id) => {
Nov 17 15:33:32.095 INFO [stderr]     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:32.095 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 17 15:33:32.095 INFO [stderr]     |
Nov 17 15:33:32.095 INFO [stderr] 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 17 15:33:32.095 INFO [stderr]     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:32.095 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 17 15:33:32.095 INFO [stderr]     |
Nov 17 15:33:32.095 INFO [stderr] 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 17 15:33:32.095 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `constraint`
Nov 17 15:33:32.095 INFO [stderr]    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 17 15:33:32.095 INFO [stderr]     |
Nov 17 15:33:32.095 INFO [stderr] 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 17 15:33:32.095 INFO [stderr]     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 17 15:33:32.095 INFO [stderr] 
Nov 17 15:33:32.095 INFO [stderr] warning: unused variable: `idx`
Nov 17 15:33:32.095 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 17 15:33:32.095 INFO [stderr]    |
Nov 17 15:33:32.095 INFO [stderr] 35 |             .filter(|&(idx, val)| {
Nov 17 15:33:32.096 INFO [stderr]    |                        ^^^ help: consider using `_idx` instead
Nov 17 15:33:32.096 INFO [stderr] 
Nov 17 15:33:32.096 INFO [stderr] warning: unused variable: `val`
Nov 17 15:33:32.096 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 17 15:33:32.096 INFO [stderr]    |
Nov 17 15:33:32.096 INFO [stderr] 37 |             }).map(|(idx, val)| {
Nov 17 15:33:32.096 INFO [stderr]    |                           ^^^ help: consider using `_val` instead
Nov 17 15:33:32.096 INFO [stderr] 
Nov 17 15:33:32.164 INFO [stderr] warning: variable does not need to be mutable
Nov 17 15:33:32.164 INFO [stderr]   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 17 15:33:32.164 INFO [stderr]    |
Nov 17 15:33:32.165 INFO [stderr] 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 17 15:33:32.165 INFO [stderr]    |             ----^^^^^^^^^^^^^^^
Nov 17 15:33:32.165 INFO [stderr]    |             |
Nov 17 15:33:32.165 INFO [stderr]    |             help: remove this `mut`
Nov 17 15:33:32.165 INFO [stderr]    |
Nov 17 15:33:32.165 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 17 15:33:32.165 INFO [stderr] 
Nov 17 15:33:32.620 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
Nov 17 15:33:32.622 INFO [stderr] su: No module specific data is present
Nov 17 15:33:33.226 INFO running `"docker" "inspect" "79500327a5ccf96843b3a486b307b83959df5cb61689ea85eca1c6b4f583f7a5"`
Nov 17 15:33:33.447 INFO running `"docker" "rm" "-f" "79500327a5ccf96843b3a486b307b83959df5cb61689ea85eca1c6b4f583f7a5"`
Nov 17 15:33:33.727 INFO [stdout] 79500327a5ccf96843b3a486b307b83959df5cb61689ea85eca1c6b4f583f7a5
Nov 17 15:33:33.734 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 17 15:33:34.332 INFO [stdout] e87dbf61662e14e3b909fde4151222ae35acf8a42b1645fd1a99a012fce84720
Nov 17 15:33:34.335 INFO running `"docker" "start" "-a" "e87dbf61662e14e3b909fde4151222ae35acf8a42b1645fd1a99a012fce84720"`
Nov 17 15:33:36.059 INFO [stderr] usermod: no changes
Nov 17 15:33:36.111 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Nov 17 15:33:36.119 INFO [stderr]      Running /target/debug/deps/sudoku_solver-942d501c67ac35fd
Nov 17 15:33:36.119 INFO [stdout] 
Nov 17 15:33:36.119 INFO [stdout] running 0 tests
Nov 17 15:33:36.120 INFO [stdout] 
Nov 17 15:33:36.120 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 17 15:33:36.120 INFO [stdout] 
Nov 17 15:33:36.127 INFO [stderr] su: No module specific data is present
Nov 17 15:33:37.315 INFO running `"docker" "inspect" "e87dbf61662e14e3b909fde4151222ae35acf8a42b1645fd1a99a012fce84720"`
Nov 17 15:33:37.719 INFO running `"docker" "rm" "-f" "e87dbf61662e14e3b909fde4151222ae35acf8a42b1645fd1a99a012fce84720"`
Nov 17 15:33:38.095 INFO [stdout] e87dbf61662e14e3b909fde4151222ae35acf8a42b1645fd1a99a012fce84720