Nov 09 20:07:22.386 INFO checking EthanTheMaster/sudoku_solver against master#653da4fd006c97625247acd7e076d0782cdc149b for pr-55632
Nov 09 20:07:22.386 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55632/worker-0/master#653da4fd006c97625247acd7e076d0782cdc149b:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55632/master#653da4fd006c97625247acd7e076d0782cdc149b:/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 +653da4fd006c97625247acd7e076d0782cdc149b-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"`
Nov 09 20:07:23.087 INFO blam! 81158b6fdb598541db076570ca95e564bc6123f56a1df50d1b59611c8a9d0523
Nov 09 20:07:23.091 INFO running `"docker" "start" "-a" "81158b6fdb598541db076570ca95e564bc6123f56a1df50d1b59611c8a9d0523"`
Nov 09 20:07:24.451 INFO kablam! usermod: no changes
Nov 09 20:07:24.531 INFO kablam!     Checking sudoku_solver v0.1.0 (/source)
Nov 09 20:07:25.372 INFO kablam! warning: unused variable: `operation`
Nov 09 20:07:25.372 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 09 20:07:25.373 INFO kablam!    |
Nov 09 20:07:25.373 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 09 20:07:25.373 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 09 20:07:25.373 INFO kablam!    |
Nov 09 20:07:25.374 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 09 20:07:25.374 INFO kablam! 
Nov 09 20:07:25.374 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.374 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 09 20:07:25.375 INFO kablam!     |
Nov 09 20:07:25.375 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 09 20:07:25.375 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.375 INFO kablam! 
Nov 09 20:07:25.376 INFO kablam! warning: unused variable: `operation`
Nov 09 20:07:25.376 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 09 20:07:25.376 INFO kablam!     |
Nov 09 20:07:25.376 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Nov 09 20:07:25.377 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 09 20:07:25.377 INFO kablam! 
Nov 09 20:07:25.377 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.377 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 09 20:07:25.378 INFO kablam!     |
Nov 09 20:07:25.378 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 09 20:07:25.378 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.378 INFO kablam! 
Nov 09 20:07:25.379 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.379 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 09 20:07:25.379 INFO kablam!     |
Nov 09 20:07:25.379 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 09 20:07:25.379 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.379 INFO kablam! 
Nov 09 20:07:25.379 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.379 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 09 20:07:25.379 INFO kablam!     |
Nov 09 20:07:25.379 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 09 20:07:25.379 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.379 INFO kablam! 
Nov 09 20:07:25.379 INFO kablam! warning: unused variable: `idx`
Nov 09 20:07:25.379 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 09 20:07:25.379 INFO kablam!    |
Nov 09 20:07:25.379 INFO kablam! 35 |             .filter(|&(idx, val)| {
Nov 09 20:07:25.379 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Nov 09 20:07:25.379 INFO kablam! 
Nov 09 20:07:25.379 INFO kablam! warning: unused variable: `val`
Nov 09 20:07:25.379 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 09 20:07:25.379 INFO kablam!    |
Nov 09 20:07:25.379 INFO kablam! 37 |             }).map(|(idx, val)| {
Nov 09 20:07:25.379 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Nov 09 20:07:25.379 INFO kablam! 
Nov 09 20:07:25.427 INFO kablam! warning: variable does not need to be mutable
Nov 09 20:07:25.427 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 09 20:07:25.427 INFO kablam!    |
Nov 09 20:07:25.427 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 09 20:07:25.427 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Nov 09 20:07:25.427 INFO kablam!    |             |
Nov 09 20:07:25.427 INFO kablam!    |             help: remove this `mut`
Nov 09 20:07:25.427 INFO kablam!    |
Nov 09 20:07:25.427 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 09 20:07:25.427 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `operation`
Nov 09 20:07:25.579 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 09 20:07:25.579 INFO kablam!    |
Nov 09 20:07:25.579 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 09 20:07:25.579 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 09 20:07:25.579 INFO kablam!    |
Nov 09 20:07:25.579 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.579 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 09 20:07:25.579 INFO kablam!     |
Nov 09 20:07:25.579 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 09 20:07:25.579 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `operation`
Nov 09 20:07:25.579 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 09 20:07:25.579 INFO kablam!     |
Nov 09 20:07:25.579 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Nov 09 20:07:25.579 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.579 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 09 20:07:25.579 INFO kablam!     |
Nov 09 20:07:25.579 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 09 20:07:25.579 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.579 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 09 20:07:25.579 INFO kablam!     |
Nov 09 20:07:25.579 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 09 20:07:25.579 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.579 INFO kablam! warning: unused variable: `constraint`
Nov 09 20:07:25.579 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 09 20:07:25.579 INFO kablam!     |
Nov 09 20:07:25.579 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 09 20:07:25.579 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 09 20:07:25.579 INFO kablam! 
Nov 09 20:07:25.595 INFO kablam! warning: unused variable: `idx`
Nov 09 20:07:25.595 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 09 20:07:25.595 INFO kablam!    |
Nov 09 20:07:25.595 INFO kablam! 35 |             .filter(|&(idx, val)| {
Nov 09 20:07:25.595 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Nov 09 20:07:25.595 INFO kablam! 
Nov 09 20:07:25.595 INFO kablam! warning: unused variable: `val`
Nov 09 20:07:25.595 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 09 20:07:25.595 INFO kablam!    |
Nov 09 20:07:25.595 INFO kablam! 37 |             }).map(|(idx, val)| {
Nov 09 20:07:25.595 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Nov 09 20:07:25.595 INFO kablam! 
Nov 09 20:07:25.647 INFO kablam! warning: variable does not need to be mutable
Nov 09 20:07:25.647 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 09 20:07:25.647 INFO kablam!    |
Nov 09 20:07:25.647 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 09 20:07:25.647 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Nov 09 20:07:25.647 INFO kablam!    |             |
Nov 09 20:07:25.647 INFO kablam!    |             help: remove this `mut`
Nov 09 20:07:25.647 INFO kablam!    |
Nov 09 20:07:25.647 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 09 20:07:25.647 INFO kablam! 
Nov 09 20:07:25.690 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
Nov 09 20:07:25.690 INFO kablam! su: No module specific data is present
Nov 09 20:07:26.598 INFO running `"docker" "rm" "-f" "81158b6fdb598541db076570ca95e564bc6123f56a1df50d1b59611c8a9d0523"`
Nov 09 20:07:26.903 INFO blam! 81158b6fdb598541db076570ca95e564bc6123f56a1df50d1b59611c8a9d0523