Nov 01 12:18:34.746 INFO checking EthanTheMaster/sudoku_solver against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Nov 01 12:18:34.746 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-4/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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 01 12:18:35.232 INFO blam! cce52bc2373c940e48865ed4b4a2485391dff115c8477cf22f5f00b1d4e45812
Nov 01 12:18:35.240 INFO running `"docker" "start" "-a" "cce52bc2373c940e48865ed4b4a2485391dff115c8477cf22f5f00b1d4e45812"`
Nov 01 12:18:36.444 INFO kablam! usermod: no changes
Nov 01 12:18:36.511 INFO kablam!     Checking sudoku_solver v0.1.0 (/source)
Nov 01 12:18:37.277 INFO kablam! warning: unused variable: `operation`
Nov 01 12:18:37.277 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 01 12:18:37.277 INFO kablam!    |
Nov 01 12:18:37.277 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 01 12:18:37.277 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 01 12:18:37.278 INFO kablam!    |
Nov 01 12:18:37.278 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.278 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 01 12:18:37.278 INFO kablam!     |
Nov 01 12:18:37.278 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 01 12:18:37.278 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `operation`
Nov 01 12:18:37.278 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 01 12:18:37.278 INFO kablam!     |
Nov 01 12:18:37.278 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Nov 01 12:18:37.278 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.278 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 01 12:18:37.278 INFO kablam!     |
Nov 01 12:18:37.278 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 01 12:18:37.278 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.278 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 01 12:18:37.278 INFO kablam!     |
Nov 01 12:18:37.278 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 01 12:18:37.278 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.278 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 01 12:18:37.278 INFO kablam!     |
Nov 01 12:18:37.278 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 01 12:18:37.278 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.278 INFO kablam! warning: unused variable: `idx`
Nov 01 12:18:37.278 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 01 12:18:37.278 INFO kablam!    |
Nov 01 12:18:37.278 INFO kablam! 35 |             .filter(|&(idx, val)| {
Nov 01 12:18:37.278 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Nov 01 12:18:37.278 INFO kablam! 
Nov 01 12:18:37.279 INFO kablam! warning: unused variable: `val`
Nov 01 12:18:37.279 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 01 12:18:37.279 INFO kablam!    |
Nov 01 12:18:37.279 INFO kablam! 37 |             }).map(|(idx, val)| {
Nov 01 12:18:37.279 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Nov 01 12:18:37.279 INFO kablam! 
Nov 01 12:18:37.356 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:18:37.356 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 01 12:18:37.356 INFO kablam!    |
Nov 01 12:18:37.356 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 01 12:18:37.356 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Nov 01 12:18:37.356 INFO kablam!    |             |
Nov 01 12:18:37.356 INFO kablam!    |             help: remove this `mut`
Nov 01 12:18:37.356 INFO kablam!    |
Nov 01 12:18:37.356 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:18:37.357 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `operation`
Nov 01 12:18:37.428 INFO kablam!   --> src/sudoku_solver_dancinglinks/mod.rs:96:32
Nov 01 12:18:37.428 INFO kablam!    |
Nov 01 12:18:37.428 INFO kablam! 96 |         if let NodeType::Field(operation, column_header_id) = node_type {
Nov 01 12:18:37.428 INFO kablam!    |                                ^^^^^^^^^ help: consider using `_operation` instead
Nov 01 12:18:37.428 INFO kablam!    |
Nov 01 12:18:37.428 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.428 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:100:48
Nov 01 12:18:37.428 INFO kablam!     |
Nov 01 12:18:37.428 INFO kablam! 100 |                 NodeType::ColumnHeader(ref mut constraint, ref mut size) => {
Nov 01 12:18:37.428 INFO kablam!     |                                                ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `operation`
Nov 01 12:18:37.428 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:119:29
Nov 01 12:18:37.428 INFO kablam!     |
Nov 01 12:18:37.428 INFO kablam! 119 |             NodeType::Field(operation, column_header_id) => {
Nov 01 12:18:37.428 INFO kablam!     |                             ^^^^^^^^^ help: consider using `_operation` instead
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.428 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:127:36
Nov 01 12:18:37.428 INFO kablam!     |
Nov 01 12:18:37.428 INFO kablam! 127 |             NodeType::ColumnHeader(constraint, size) => {
Nov 01 12:18:37.428 INFO kablam!     |                                    ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.428 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:226:44
Nov 01 12:18:37.428 INFO kablam!     |
Nov 01 12:18:37.428 INFO kablam! 226 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 01 12:18:37.428 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `constraint`
Nov 01 12:18:37.428 INFO kablam!    --> src/sudoku_solver_dancinglinks/mod.rs:269:44
Nov 01 12:18:37.428 INFO kablam!     |
Nov 01 12:18:37.428 INFO kablam! 269 |                     NodeType::ColumnHeader(constraint, ref mut size) => {
Nov 01 12:18:37.428 INFO kablam!     |                                            ^^^^^^^^^^ help: consider using `_constraint` instead
Nov 01 12:18:37.428 INFO kablam! 
Nov 01 12:18:37.428 INFO kablam! warning: unused variable: `idx`
Nov 01 12:18:37.429 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:35:24
Nov 01 12:18:37.429 INFO kablam!    |
Nov 01 12:18:37.429 INFO kablam! 35 |             .filter(|&(idx, val)| {
Nov 01 12:18:37.429 INFO kablam!    |                        ^^^ help: consider using `_idx` instead
Nov 01 12:18:37.429 INFO kablam! 
Nov 01 12:18:37.429 INFO kablam! warning: unused variable: `val`
Nov 01 12:18:37.429 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:37:27
Nov 01 12:18:37.429 INFO kablam!    |
Nov 01 12:18:37.429 INFO kablam! 37 |             }).map(|(idx, val)| {
Nov 01 12:18:37.429 INFO kablam!    |                           ^^^ help: consider using `_val` instead
Nov 01 12:18:37.429 INFO kablam! 
Nov 01 12:18:37.492 INFO kablam! warning: variable does not need to be mutable
Nov 01 12:18:37.492 INFO kablam!   --> src/sudoku_solver_backtrack/mod.rs:34:13
Nov 01 12:18:37.492 INFO kablam!    |
Nov 01 12:18:37.492 INFO kablam! 34 |         let mut blank_positions: Vec<usize> = self.board.iter().enumerate()
Nov 01 12:18:37.492 INFO kablam!    |             ----^^^^^^^^^^^^^^^
Nov 01 12:18:37.492 INFO kablam!    |             |
Nov 01 12:18:37.492 INFO kablam!    |             help: remove this `mut`
Nov 01 12:18:37.492 INFO kablam!    |
Nov 01 12:18:37.492 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 12:18:37.492 INFO kablam! 
Nov 01 12:18:37.542 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
Nov 01 12:18:37.576 INFO kablam! su: No module specific data is present
Nov 01 12:18:38.242 INFO running `"docker" "rm" "-f" "cce52bc2373c940e48865ed4b4a2485391dff115c8477cf22f5f00b1d4e45812"`
Nov 01 12:18:38.484 INFO blam! cce52bc2373c940e48865ed4b4a2485391dff115c8477cf22f5f00b1d4e45812