[INFO] cloning repository https://github.com/48276AntonioMarques/rust-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/48276AntonioMarques/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79e7b6333b5a39c280d6aabe946a20076e19b7a7
[INFO] checking 48276AntonioMarques/rust-sudoku against try#e117153a45c546e883c1f91d82611775fcaeffe0 for pr-146470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F48276AntonioMarques%2Frust-sudoku" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/48276AntonioMarques/rust-sudoku
[INFO] finished tweaking git repo https://github.com/48276AntonioMarques/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/48276AntonioMarques/rust-sudoku written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/48276AntonioMarques/rust-sudoku on toolchain e117153a45c546e883c1f91d82611775fcaeffe0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/48276AntonioMarques/rust-sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a425ad8260dcef457f9270d74977f94a94013e88d73ca49c97c0ffa75e697497
[INFO] running `Command { std: "docker" "start" "-a" "a425ad8260dcef457f9270d74977f94a94013e88d73ca49c97c0ffa75e697497", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a425ad8260dcef457f9270d74977f94a94013e88d73ca49c97c0ffa75e697497", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a425ad8260dcef457f9270d74977f94a94013e88d73ca49c97c0ffa75e697497", kill_on_drop: false }`
[INFO] [stdout] a425ad8260dcef457f9270d74977f94a94013e88d73ca49c97c0ffa75e697497
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+e117153a45c546e883c1f91d82611775fcaeffe0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9757c859abf59373192faa92d0eacf646ca0cfa0caf784176a4b3095e900c6fd
[INFO] running `Command { std: "docker" "start" "-a" "9757c859abf59373192faa92d0eacf646ca0cfa0caf784176a4b3095e900c6fd", kill_on_drop: false }`
[INFO] [stderr]     Checking sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `exception`
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Err(exception) => {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exception`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/game/board.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Row {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 10 |     index: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Column` is never constructed
[INFO] [stdout]   --> src/game/board.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Column {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grid` is never constructed
[INFO] [stdout]   --> src/game/board.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grid {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_column` and `get_grid` are never used
[INFO] [stdout]   --> src/game/board.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Board {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get_column(&self, index: u8) -> Result<Column, Exception> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn get_grid(&self, index: u8) -> Result<Grid, Exception> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EMPTY` is never constructed
[INFO] [stdout]  --> src/game/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum CellValue {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 4 |     EMPTY,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pos_to_number` is never used
[INFO] [stdout]   --> src/game/cell.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn pos_to_number(pos: u16) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_value`, `is_empty`, and `is_readonly` are never used
[INFO] [stdout]   --> src/game/cell.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Cell {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn get_value(&self) -> CellValue {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn is_readonly(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ColumnOutOfBounds` and `GridOutOfBounds` are never constructed
[INFO] [stdout]  --> src/exceptions.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Exception {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     ColumnOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     GridOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exception`
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Err(exception) => {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exception`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/game/board.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Row {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 10 |     index: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Column` is never constructed
[INFO] [stdout]   --> src/game/board.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Column {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grid` is never constructed
[INFO] [stdout]   --> src/game/board.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grid {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_column` and `get_grid` are never used
[INFO] [stdout]   --> src/game/board.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Board {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get_column(&self, index: u8) -> Result<Column, Exception> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn get_grid(&self, index: u8) -> Result<Grid, Exception> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EMPTY` is never constructed
[INFO] [stdout]  --> src/game/cell.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum CellValue {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 4 |     EMPTY,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pos_to_number` is never used
[INFO] [stdout]   --> src/game/cell.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn pos_to_number(pos: u16) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_value`, `is_empty`, and `is_readonly` are never used
[INFO] [stdout]   --> src/game/cell.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Cell {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn get_value(&self) -> CellValue {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn is_readonly(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ColumnOutOfBounds` and `GridOutOfBounds` are never constructed
[INFO] [stdout]  --> src/exceptions.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Exception {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     ColumnOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6 |     GridOutOfBounds,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "9757c859abf59373192faa92d0eacf646ca0cfa0caf784176a4b3095e900c6fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9757c859abf59373192faa92d0eacf646ca0cfa0caf784176a4b3095e900c6fd", kill_on_drop: false }`
[INFO] [stdout] 9757c859abf59373192faa92d0eacf646ca0cfa0caf784176a4b3095e900c6fd
