Oct 13 04:49:43.633 INFO checking EthanTheMaster/sudoku_solver against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 04:49:43.633 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-3/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-3/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-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"`
Oct 13 04:49:44.150 INFO blam! 314c6d76933752e4839596a9d1d4e64d3b6a4b4e9db8ceadc9c110527ec09335
Oct 13 04:49:44.152 INFO running `"docker" "start" "-a" "314c6d76933752e4839596a9d1d4e64d3b6a4b4e9db8ceadc9c110527ec09335"`
Oct 13 04:49:46.248 INFO kablam! usermod: no changes
Oct 13 04:49:46.296 INFO kablam!     Checking sudoku_solver v0.1.0 (/source)
Oct 13 04:49:47.502 INFO kablam! warning: unused variable: `operation`
Oct 13 04:49:47.502 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Oct 13 04:49:47.502 INFO kablam!    |
Oct 13 04:49:47.502 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Oct 13 04:49:47.502 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Oct 13 04:49:47.503 INFO kablam!    |
Oct 13 04:49:47.503 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 13 04:49:47.503 INFO kablam! 
Oct 13 04:49:47.503 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.503 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Oct 13 04:49:47.503 INFO kablam!     |
Oct 13 04:49:47.503 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Oct 13 04:49:47.503 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.503 INFO kablam! 
Oct 13 04:49:47.503 INFO kablam! warning: unused variable: `operation`
Oct 13 04:49:47.503 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Oct 13 04:49:47.503 INFO kablam!     |
Oct 13 04:49:47.504 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Oct 13 04:49:47.504 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Oct 13 04:49:47.504 INFO kablam! 
Oct 13 04:49:47.504 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.504 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Oct 13 04:49:47.504 INFO kablam!     |
Oct 13 04:49:47.504 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Oct 13 04:49:47.504 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.504 INFO kablam! 
Oct 13 04:49:47.504 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.504 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Oct 13 04:49:47.504 INFO kablam!     |
Oct 13 04:49:47.504 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Oct 13 04:49:47.504 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.504 INFO kablam! 
Oct 13 04:49:47.504 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.504 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Oct 13 04:49:47.504 INFO kablam!     |
Oct 13 04:49:47.504 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Oct 13 04:49:47.504 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.504 INFO kablam! 
Oct 13 04:49:47.504 INFO kablam! warning: unused variable: `idx`
Oct 13 04:49:47.504 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Oct 13 04:49:47.505 INFO kablam!    |
Oct 13 04:49:47.505 INFO kablam! 35 |             .filter(|&(idx, val)| {
Oct 13 04:49:47.505 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Oct 13 04:49:47.505 INFO kablam! 
Oct 13 04:49:47.505 INFO kablam! warning: unused variable: `val`
Oct 13 04:49:47.505 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Oct 13 04:49:47.505 INFO kablam!    |
Oct 13 04:49:47.505 INFO kablam! 37 |             }).map(|(idx, val)| {
Oct 13 04:49:47.505 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Oct 13 04:49:47.505 INFO kablam! 
Oct 13 04:49:47.540 INFO kablam! warning: unused variable: `operation`
Oct 13 04:49:47.540 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Oct 13 04:49:47.540 INFO kablam!    |
Oct 13 04:49:47.540 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Oct 13 04:49:47.540 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Oct 13 04:49:47.541 INFO kablam!    |
Oct 13 04:49:47.542 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 13 04:49:47.542 INFO kablam! 
Oct 13 04:49:47.542 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.542 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Oct 13 04:49:47.542 INFO kablam!     |
Oct 13 04:49:47.544 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Oct 13 04:49:47.545 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.545 INFO kablam! 
Oct 13 04:49:47.545 INFO kablam! warning: unused variable: `operation`
Oct 13 04:49:47.545 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Oct 13 04:49:47.545 INFO kablam!     |
Oct 13 04:49:47.545 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Oct 13 04:49:47.545 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Oct 13 04:49:47.545 INFO kablam! 
Oct 13 04:49:47.545 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.545 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Oct 13 04:49:47.545 INFO kablam!     |
Oct 13 04:49:47.546 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Oct 13 04:49:47.546 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.546 INFO kablam! 
Oct 13 04:49:47.546 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.546 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Oct 13 04:49:47.546 INFO kablam!     |
Oct 13 04:49:47.546 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Oct 13 04:49:47.546 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.546 INFO kablam! 
Oct 13 04:49:47.546 INFO kablam! warning: unused variable: `constraint`
Oct 13 04:49:47.546 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Oct 13 04:49:47.546 INFO kablam!     |
Oct 13 04:49:47.546 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Oct 13 04:49:47.546 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Oct 13 04:49:47.546 INFO kablam! 
Oct 13 04:49:47.546 INFO kablam! warning: unused variable: `idx`
Oct 13 04:49:47.546 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Oct 13 04:49:47.546 INFO kablam!    |
Oct 13 04:49:47.546 INFO kablam! 35 |             .filter(|&(idx, val)| {
Oct 13 04:49:47.546 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Oct 13 04:49:47.546 INFO kablam! 
Oct 13 04:49:47.546 INFO kablam! warning: unused variable: `val`
Oct 13 04:49:47.546 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Oct 13 04:49:47.546 INFO kablam!    |
Oct 13 04:49:47.547 INFO kablam! 37 |             }).map(|(idx, val)| {
Oct 13 04:49:47.547 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Oct 13 04:49:47.547 INFO kablam! 
Oct 13 04:49:47.557 INFO kablam! warning: variable does not need to be mutable
Oct 13 04:49:47.557 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Oct 13 04:49:47.557 INFO kablam!    |
Oct 13 04:49:47.557 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Oct 13 04:49:47.557 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Oct 13 04:49:47.557 INFO kablam!    |             |
Oct 13 04:49:47.557 INFO kablam!    |             help: remove this `mut`
Oct 13 04:49:47.557 INFO kablam!    |
Oct 13 04:49:47.557 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 04:49:47.558 INFO kablam! 
Oct 13 04:49:47.622 INFO kablam! warning: variable does not need to be mutable
Oct 13 04:49:47.622 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Oct 13 04:49:47.622 INFO kablam!    |
Oct 13 04:49:47.622 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Oct 13 04:49:47.623 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Oct 13 04:49:47.623 INFO kablam!    |             |
Oct 13 04:49:47.623 INFO kablam!    |             help: remove this `mut`
Oct 13 04:49:47.623 INFO kablam!    |
Oct 13 04:49:47.623 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 04:49:47.623 INFO kablam! 
Oct 13 04:49:47.664 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.37s
Oct 13 04:49:47.664 INFO kablam! su: No module specific data is present
Oct 13 04:49:48.342 INFO running `"docker" "rm" "-f" "314c6d76933752e4839596a9d1d4e64d3b6a4b4e9db8ceadc9c110527ec09335"`
Oct 13 04:49:48.684 INFO blam! 314c6d76933752e4839596a9d1d4e64d3b6a4b4e9db8ceadc9c110527ec09335