[INFO] cloning repository https://github.com/Fo-Zi/sudoku-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Fo-Zi/sudoku-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFo-Zi%2Fsudoku-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFo-Zi%2Fsudoku-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a116e80efaaba649ab8992ab130bbfe18f0f8f3a
[INFO] checking Fo-Zi/sudoku-rs against master#32cd9114712a24010b0583624dc52ac302194128 for pr-143717
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFo-Zi%2Fsudoku-rs" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Fo-Zi/sudoku-rs
[INFO] finished tweaking git repo https://github.com/Fo-Zi/sudoku-rs
[INFO] tweaked toml for git repo https://github.com/Fo-Zi/sudoku-rs written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Fo-Zi/sudoku-rs on toolchain 32cd9114712a24010b0583624dc52ac302194128
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Fo-Zi/sudoku-rs 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" "+32cd9114712a24010b0583624dc52ac302194128" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.x86_64-pc-windows-msvc.linker
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded egui_extras v0.31.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45beab0075000f74072ed4c54675c8f66261032d0b55411beb1593ee9fe00c7c
[INFO] running `Command { std: "docker" "start" "-a" "45beab0075000f74072ed4c54675c8f66261032d0b55411beb1593ee9fe00c7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45beab0075000f74072ed4c54675c8f66261032d0b55411beb1593ee9fe00c7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45beab0075000f74072ed4c54675c8f66261032d0b55411beb1593ee9fe00c7c", kill_on_drop: false }`
[INFO] [stdout] 45beab0075000f74072ed4c54675c8f66261032d0b55411beb1593ee9fe00c7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17279dca4252a653b90bc01de8b52a11abdb61f795580223d73f6628ba1dd7d8
[INFO] running `Command { std: "docker" "start" "-a" "17279dca4252a653b90bc01de8b52a11abdb61f795580223d73f6628ba1dd7d8", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `cell::Cell`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::Cell, collections::HashMap};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cell::Cell`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::Cell, collections::HashMap};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `keys_with_duplicate_values` is never used
[INFO] [stdout]  --> src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn keys_with_duplicate_values<K: Eq + std::hash::Hash + Clone, V: Eq + std::hash::Hash>(
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `cells` is never read
[INFO] [stdout]   --> src/main.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct SubGrid {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 62 |     cells: HashMap<PositionId, Option<u8>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SubGrid` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SubGridMove` is never constructed
[INFO] [stdout]   --> src/main.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | struct SubGridMove {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SubgridMoveResult` is never used
[INFO] [stdout]   --> src/main.rs:71:6
[INFO] [stdout]    |
[INFO] [stdout] 71 | enum SubgridMoveResult {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `update_value`, `get_value`, `get_duplicates`, and `make_move` are never used
[INFO] [stdout]    --> src/main.rs:93:8
[INFO] [stdout]     |
[INFO] [stdout] 76  | impl SubGrid {
[INFO] [stdout]     | ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 93  |     fn update_value(&mut self, key: PositionId, value: u8) -> Result< () , String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     fn get_value(&self, key: PositionId) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn get_duplicates(&self) -> Option<Vec<PositionId>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     pub fn make_move(&mut self, sub_grid_move: SubGridMove) -> SubgridMoveResult {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sub_grid` and `cell` are never read
[INFO] [stdout]    --> src/main.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 136 | struct CellCoordinate {
[INFO] [stdout]     |        -------------- fields in this struct
[INFO] [stdout] 137 |     sub_grid: PositionId,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 138 |     cell: PositionId,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sub_grids` is never read
[INFO] [stdout]    --> src/main.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 143 | struct SudokuBoard {
[INFO] [stdout]     |        ----------- field in this struct
[INFO] [stdout] 144 |     sub_grids: HashMap<PositionId, SubGrid>,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cell_coordinate` and `value` are never read
[INFO] [stdout]    --> src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 147 | struct SudokuMove {
[INFO] [stdout]     |        ---------- fields in this struct
[INFO] [stdout] 148 |     cell_coordinate: CellCoordinate,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 149 |     value: u8,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SudokuMoveResult` is never used
[INFO] [stdout]    --> src/main.rs:152:6
[INFO] [stdout]     |
[INFO] [stdout] 152 | enum SudokuMoveResult {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `update_value`, `get_value`, `get_row_duplicates`, `get_column_duplicates`, and `make_move` are never used
[INFO] [stdout]    --> src/main.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | impl SudokuBoard {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 178 |     fn update_value(&mut self, cell_coordinate: CellCoordinate, value: u8) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 184 |     fn get_value(&self, cell_coordinate: CellCoordinate) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 189 |     fn get_row_duplicates(&self, sudoku_move: &SudokuMove) -> Option<Vec<CellCoordinate>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 221 |     fn get_column_duplicates(&self, sudoku_move: &SudokuMove) -> Option<Vec<CellCoordinate>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn make_move(&mut self, sudoku_move: &SudokuMove) -> SudokuMoveResult {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `board`, `move_history`, and `nr_mistakes` are never read
[INFO] [stdout]    --> src/main.rs:291:5
[INFO] [stdout]     |
[INFO] [stdout] 290 | struct SudokuApp {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 291 |     board: SudokuBoard,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 292 |     move_history: Vec<SudokuMove>,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 293 |     nr_mistakes: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             self.update_value(sub_grid_move.cell, sub_grid_move.value);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 122 |             let _ = self.update_value(sub_grid_move.cell, sub_grid_move.value);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:180:13
[INFO] [stdout]     |
[INFO] [stdout] 180 |             subgrid_entry.update_value(cell_coordinate.cell, value);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 180 |             let _ = subgrid_entry.update_value(cell_coordinate.cell, value);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:335:13
[INFO] [stdout]     |
[INFO] [stdout] 335 |         let mut empty_test_cells: HashMap<PositionId, Option<u8>> = HashMap::new();
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sub_grid` and `cell` are never read
[INFO] [stdout]    --> src/main.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 136 | struct CellCoordinate {
[INFO] [stdout]     |        -------------- fields in this struct
[INFO] [stdout] 137 |     sub_grid: PositionId,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 138 |     cell: PositionId,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sub_grids` is never read
[INFO] [stdout]    --> src/main.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 143 | struct SudokuBoard {
[INFO] [stdout]     |        ----------- field in this struct
[INFO] [stdout] 144 |     sub_grids: HashMap<PositionId, SubGrid>,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cell_coordinate` and `value` are never read
[INFO] [stdout]    --> src/main.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 147 | struct SudokuMove {
[INFO] [stdout]     |        ---------- fields in this struct
[INFO] [stdout] 148 |     cell_coordinate: CellCoordinate,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 149 |     value: u8,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SudokuMoveResult` is never used
[INFO] [stdout]    --> src/main.rs:152:6
[INFO] [stdout]     |
[INFO] [stdout] 152 | enum SudokuMoveResult {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `update_value`, `get_value`, `get_row_duplicates`, `get_column_duplicates`, and `make_move` are never used
[INFO] [stdout]    --> src/main.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | impl SudokuBoard {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 178 |     fn update_value(&mut self, cell_coordinate: CellCoordinate, value: u8) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 184 |     fn get_value(&self, cell_coordinate: CellCoordinate) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 189 |     fn get_row_duplicates(&self, sudoku_move: &SudokuMove) -> Option<Vec<CellCoordinate>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 221 |     fn get_column_duplicates(&self, sudoku_move: &SudokuMove) -> Option<Vec<CellCoordinate>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn make_move(&mut self, sudoku_move: &SudokuMove) -> SudokuMoveResult {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `board`, `move_history`, and `nr_mistakes` are never read
[INFO] [stdout]    --> src/main.rs:291:5
[INFO] [stdout]     |
[INFO] [stdout] 290 | struct SudokuApp {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 291 |     board: SudokuBoard,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 292 |     move_history: Vec<SudokuMove>,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 293 |     nr_mistakes: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             self.update_value(sub_grid_move.cell, sub_grid_move.value);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 122 |             let _ = self.update_value(sub_grid_move.cell, sub_grid_move.value);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:180:13
[INFO] [stdout]     |
[INFO] [stdout] 180 |             subgrid_entry.update_value(cell_coordinate.cell, value);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 180 |             let _ = subgrid_entry.update_value(cell_coordinate.cell, value);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 2m 26s
[INFO] running `Command { std: "docker" "inspect" "17279dca4252a653b90bc01de8b52a11abdb61f795580223d73f6628ba1dd7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17279dca4252a653b90bc01de8b52a11abdb61f795580223d73f6628ba1dd7d8", kill_on_drop: false }`
[INFO] [stdout] 17279dca4252a653b90bc01de8b52a11abdb61f795580223d73f6628ba1dd7d8
