[INFO] cloning repository https://github.com/jamwaffles/SudokuSolver.rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jamwaffles/SudokuSolver.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamwaffles%2FSudokuSolver.rs"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamwaffles%2FSudokuSolver.rs'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0935762e8ab6c025ae83ec1adc4136d3629bba6b
[INFO] checking jamwaffles/SudokuSolver.rs against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamwaffles%2FSudokuSolver.rs" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jamwaffles/SudokuSolver.rs on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jamwaffles/SudokuSolver.rs
[INFO] finished tweaking git repo https://github.com/jamwaffles/SudokuSolver.rs
[INFO] tweaked toml for git repo https://github.com/jamwaffles/SudokuSolver.rs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jamwaffles/SudokuSolver.rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cdaec992ded7fac5d0b0e360f1b02bf72c77b7182f61a59d868b074077c31a1a
[INFO] running `"docker" "start" "-a" "cdaec992ded7fac5d0b0e360f1b02bf72c77b7182f61a59d868b074077c31a1a"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking SudokuSolver v0.1.0 (/opt/rustwide/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` iterator 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` iterator 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` iterator 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` iterator 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "cdaec992ded7fac5d0b0e360f1b02bf72c77b7182f61a59d868b074077c31a1a"`
[INFO] running `"docker" "rm" "-f" "cdaec992ded7fac5d0b0e360f1b02bf72c77b7182f61a59d868b074077c31a1a"`
[INFO] [stdout] cdaec992ded7fac5d0b0e360f1b02bf72c77b7182f61a59d868b074077c31a1a