[INFO] cloning repository https://github.com/jamwaffles/SudokuSolver.rs
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamwaffles%2FSudokuSolver.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0935762e8ab6c025ae83ec1adc4136d3629bba6b
[INFO] testing jamwaffles/SudokuSolver.rs against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamwaffles%2FSudokuSolver.rs" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jamwaffles/SudokuSolver.rs on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-10/source/Cargo.toml
[INFO] crate git repo https://github.com/jamwaffles/SudokuSolver.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0afd2faefa3153994fcc379829fc436263cb074b674510e9befada260731e10
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d0afd2faefa3153994fcc379829fc436263cb074b674510e9befada260731e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0afd2faefa3153994fcc379829fc436263cb074b674510e9befada260731e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0afd2faefa3153994fcc379829fc436263cb074b674510e9befada260731e10", kill_on_drop: false }`
[INFO] [stdout] d0afd2faefa3153994fcc379829fc436263cb074b674510e9befada260731e10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 703a438c2d2e1e4475917540659c7f8f5c14311f17f7c04e966f2d52e4033120
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "703a438c2d2e1e4475917540659c7f8f5c14311f17f7c04e966f2d52e4033120", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling SudokuSolver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/sudoku/mod.rs:93:7
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 if(col == 0) {
[INFO] [stdout]    |                   ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 93 -                 if(col == 0) {
[INFO] [stdout] 93 +                 if col == 0 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/sudoku/mod.rs:195:32
[INFO] [stdout]     |
[INFO] [stdout] 195 |                         'columns: for block_y in (top..top + 3) {
[INFO] [stdout]     |                                                  ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 195 -                         'columns: for block_y in (top..top + 3) {
[INFO] [stdout] 195 +                         'columns: for block_y in top..top + 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/sudoku/mod.rs:196:23
[INFO] [stdout]     |
[INFO] [stdout] 196 | ...                   for block_x in (left..left + 3) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 196 -                             for block_x in (left..left + 3) {
[INFO] [stdout] 196 +                             for block_x in left..left + 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/sudoku/mod.rs:160:19
[INFO] [stdout]     |
[INFO] [stdout] 160 |                         for (row_x, value) in self.board[y].iter().enumerate() {
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/sudoku/mod.rs:179:19
[INFO] [stdout]     |
[INFO] [stdout] 179 |                         for (col_y, value) in col.iter().enumerate() {
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/sudoku/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(input_board: &[ [ u8; 9 ]; 9 ]) -> Board {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SudokuSolver` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `sudoku_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `Command { std: "docker" "inspect" "703a438c2d2e1e4475917540659c7f8f5c14311f17f7c04e966f2d52e4033120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "703a438c2d2e1e4475917540659c7f8f5c14311f17f7c04e966f2d52e4033120", kill_on_drop: false }`
[INFO] [stdout] 703a438c2d2e1e4475917540659c7f8f5c14311f17f7c04e966f2d52e4033120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f56cfdacf5abaafbfafc0875932ca69c269358ba218d7a762e6a340937873d5e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f56cfdacf5abaafbfafc0875932ca69c269358ba218d7a762e6a340937873d5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling SudokuSolver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/sudoku/mod.rs:93:7
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 if(col == 0) {
[INFO] [stdout]    |                   ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 93 -                 if(col == 0) {
[INFO] [stdout] 93 +                 if col == 0 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/sudoku/mod.rs:195:32
[INFO] [stdout]     |
[INFO] [stdout] 195 |                         'columns: for block_y in (top..top + 3) {
[INFO] [stdout]     |                                                  ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 195 -                         'columns: for block_y in (top..top + 3) {
[INFO] [stdout] 195 +                         'columns: for block_y in top..top + 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/sudoku/mod.rs:196:23
[INFO] [stdout]     |
[INFO] [stdout] 196 | ...                   for block_x in (left..left + 3) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 196 -                             for block_x in (left..left + 3) {
[INFO] [stdout] 196 +                             for block_x in left..left + 3 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/sudoku/mod.rs:160:19
[INFO] [stdout]     |
[INFO] [stdout] 160 |                         for (row_x, value) in self.board[y].iter().enumerate() {
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/sudoku/mod.rs:179:19
[INFO] [stdout]     |
[INFO] [stdout] 179 |                         for (col_y, value) in col.iter().enumerate() {
[INFO] [stdout]     |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/sudoku/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(input_board: &[ [ u8; 9 ]; 9 ]) -> Board {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SudokuSolver` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `sudoku_solver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "f56cfdacf5abaafbfafc0875932ca69c269358ba218d7a762e6a340937873d5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f56cfdacf5abaafbfafc0875932ca69c269358ba218d7a762e6a340937873d5e", kill_on_drop: false }`
[INFO] [stdout] f56cfdacf5abaafbfafc0875932ca69c269358ba218d7a762e6a340937873d5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3b9a7abdb6504659e37d328c044191ffae4b21e8bdc414dad8d56557ff35dad7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3b9a7abdb6504659e37d328c044191ffae4b21e8bdc414dad8d56557ff35dad7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/sudoku/mod.rs:93:7
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 93 |                 if(col == 0) {
[INFO] [stdout] 
[INFO] [stderr]    |                   ^        ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 93 -                 if(col == 0) {
[INFO] [stderr] 93 +                 if col == 0 {
[INFO] [stderr]    | 
[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]     |                                                  ^            ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 195 -                         'columns: for block_y in (top..top + 3) {
[INFO] [stderr] 195 +                         'columns: for block_y in top..top + 3 {
[INFO] [stderr]     | 
[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]     |                                      ^              ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 196 -                             for block_x in (left..left + 3) {
[INFO] [stderr] 196 +                             for block_x in left..left + 3 {
[INFO] [stderr]     | 
[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: associated function is never used: `new`
[INFO] [stderr]   --> src/sudoku/mod.rs:12:9
[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: `SudokuSolver` (bin "SudokuSolver" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/SudokuSolver-2a8e10331da1a4c0)
[INFO] running `Command { std: "docker" "inspect" "3b9a7abdb6504659e37d328c044191ffae4b21e8bdc414dad8d56557ff35dad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b9a7abdb6504659e37d328c044191ffae4b21e8bdc414dad8d56557ff35dad7", kill_on_drop: false }`
[INFO] [stdout] 3b9a7abdb6504659e37d328c044191ffae4b21e8bdc414dad8d56557ff35dad7