[INFO] updating cached repository jamwaffles/SudokuSolver.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jamwaffles/SudokuSolver.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jamwaffles/SudokuSolver.rs" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/jamwaffles/SudokuSolver.rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/jamwaffles/SudokuSolver.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jamwaffles/SudokuSolver.rs" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/jamwaffles/SudokuSolver.rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/jamwaffles/SudokuSolver.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0935762e8ab6c025ae83ec1adc4136d3629bba6b
[INFO] sha for GitHub repo jamwaffles/SudokuSolver.rs: 0935762e8ab6c025ae83ec1adc4136d3629bba6b
[INFO] validating manifest of jamwaffles/SudokuSolver.rs on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jamwaffles/SudokuSolver.rs on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jamwaffles/SudokuSolver.rs
[INFO] finished frobbing jamwaffles/SudokuSolver.rs
[INFO] frobbed toml for jamwaffles/SudokuSolver.rs written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/jamwaffles/SudokuSolver.rs/Cargo.toml
[INFO] started frobbing jamwaffles/SudokuSolver.rs
[INFO] finished frobbing jamwaffles/SudokuSolver.rs
[INFO] frobbed toml for jamwaffles/SudokuSolver.rs written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/jamwaffles/SudokuSolver.rs/Cargo.toml
[INFO] crate jamwaffles/SudokuSolver.rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jamwaffles/SudokuSolver.rs against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-1/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/jamwaffles/SudokuSolver.rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15f7b55ab017146557dca788da65a9dd911108a394c905e46f503046929c5d46
[INFO] running `"docker" "start" "-a" "15f7b55ab017146557dca788da65a9dd911108a394c905e46f503046929c5d46"`
[INFO] [stderr]     Checking SudokuSolver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/sudoku/mod.rs:93:7
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 if(col == 0) {
[INFO] [stderr]    |                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/sudoku/mod.rs:195:32
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         'columns: for block_y in (top..top + 3) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/sudoku/mod.rs:196:23
[INFO] [stderr]     |
[INFO] [stderr] 196 |                             for block_x in (left..left + 3) {
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/sudoku/mod.rs:93:7
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 if(col == 0) {
[INFO] [stderr]    |                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/sudoku/mod.rs:195:32
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         'columns: for block_y in (top..top + 3) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/sudoku/mod.rs:196:23
[INFO] [stderr]     |
[INFO] [stderr] 196 |                             for block_x in (left..left + 3) {
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/sudoku/mod.rs:160:19
[INFO] [stderr]     |
[INFO] [stderr] 160 |                         for (row_x, value) in self.board[y].iter().enumerate() {
[INFO] [stderr]     |                                     ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/sudoku/mod.rs:179:19
[INFO] [stderr]     |
[INFO] [stderr] 179 |                         for (col_y, value) in col.iter().enumerate() {
[INFO] [stderr]     |                                     ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/sudoku/mod.rs:160:19
[INFO] [stderr]     |
[INFO] [stderr] 160 |                         for (row_x, value) in self.board[y].iter().enumerate() {
[INFO] [stderr]     |                                     ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/sudoku/mod.rs:179:19
[INFO] [stderr]     |
[INFO] [stderr] 179 |                         for (col_y, value) in col.iter().enumerate() {
[INFO] [stderr]     |                                     ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/sudoku/mod.rs:12:2
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(input_board: &[ [ u8; 9 ]; 9 ]) -> Board {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SudokuSolver` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sudoku_solver`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/sudoku/mod.rs:12:2
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new(input_board: &[ [ u8; 9 ]; 9 ]) -> Board {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SudokuSolver` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sudoku_solver`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "15f7b55ab017146557dca788da65a9dd911108a394c905e46f503046929c5d46"`
[INFO] running `"docker" "rm" "-f" "15f7b55ab017146557dca788da65a9dd911108a394c905e46f503046929c5d46"`
[INFO] [stdout] 15f7b55ab017146557dca788da65a9dd911108a394c905e46f503046929c5d46