[INFO] cloning repository https://github.com/JoshuaRadin37/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoshuaRadin37/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshuaRadin37%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshuaRadin37%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab48534fd965ac293af7e19ab94618525193cbb5
[INFO] checking JoshuaRadin37/sudoku against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshuaRadin37%2Fsudoku" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JoshuaRadin37/sudoku
[INFO] finished tweaking git repo https://github.com/JoshuaRadin37/sudoku
[INFO] tweaked toml for git repo https://github.com/JoshuaRadin37/sudoku written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JoshuaRadin37/sudoku on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JoshuaRadin37/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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "ab60cdd6dff138da725332cd2a737f2ad87acf12fb8284bd0bb46d53603ca3a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab60cdd6dff138da725332cd2a737f2ad87acf12fb8284bd0bb46d53603ca3a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab60cdd6dff138da725332cd2a737f2ad87acf12fb8284bd0bb46d53603ca3a4", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "235115c1dc69613926bbe023af586a7a0ab114e541b05fa6bf8368fad509e10f", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/game_creator/random_create_game.rs:5:26
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::{Instant, Duration};
[INFO] [stdout]   |                          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::advanced_solver::Solver`
[INFO] [stdout]   --> src/game_creator/random_create_game.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::advanced_solver::Solver;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/game_creator/random_create_game.rs:5:26
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::{Instant, Duration};
[INFO] [stdout]   |                          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::advanced_solver::Solver`
[INFO] [stdout]   --> src/game_creator/random_create_game.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::advanced_solver::Solver;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_board`
[INFO] [stdout]   --> src/advanced_solver/techniques/hidden_pair.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn apply_to(&self, game_board: &GameBoard) -> Result<GameBoard, ()> {
[INFO] [stdout]    |                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_board`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solution`
[INFO] [stdout]    --> src/game_creator/random_create_game.rs:216:13
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let solution = game_board.clone();
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/game_creator/byte_string_create_game.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ByteStringFormError(String);
[INFO] [stdout]    |            ------------------- ^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `ByteStringFormError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_from_vec` is never used
[INFO] [stdout]   --> src/game_creator/random_create_game.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn take_from_vec<T, R : Rng>(vector: &mut Vec<T>, rng: &mut R) -> Option<T> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:536:16
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn row(&self, index: usize) -> Option<Row> {
[INFO] [stdout]     |                ^^^^^                          ^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn row(&self, index: usize) -> Option<Row<'_>> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:544:20
[INFO] [stdout]     |
[INFO] [stdout] 544 |     pub fn row_mut(&mut self, index: usize) -> Option<RowMut> {
[INFO] [stdout]     |                    ^^^^^^^^^                          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 544 |     pub fn row_mut(&mut self, index: usize) -> Option<RowMut<'_>> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:552:19
[INFO] [stdout]     |
[INFO] [stdout] 552 |     pub fn column(&self, index: usize) -> Option<Column> {
[INFO] [stdout]     |                   ^^^^^                          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 552 |     pub fn column(&self, index: usize) -> Option<Column<'_>> {
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:572:23
[INFO] [stdout]     |
[INFO] [stdout] 572 |     pub fn column_mut(&mut self, index: usize) -> Option<ColumnMut> {
[INFO] [stdout]     |                       ^^^^^^^^^                          ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 572 |     pub fn column_mut(&mut self, index: usize) -> Option<ColumnMut<'_>> {
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:580:18
[INFO] [stdout]     |
[INFO] [stdout] 580 |     pub fn house(&self, x: usize, y: usize) -> Option<House> {
[INFO] [stdout]     |                  ^^^^^ the lifetime is elided here    ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 580 |     pub fn house(&self, x: usize, y: usize) -> Option<House<'_>> {
[INFO] [stdout]     |                                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:604:22
[INFO] [stdout]     |
[INFO] [stdout] 604 |     pub fn house_mut(&mut self, x: usize, y: usize) -> Option<HouseMut> {
[INFO] [stdout]     |                      ^^^^^^^^^ the lifetime is elided here    ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 604 |     pub fn house_mut(&mut self, x: usize, y: usize) -> Option<HouseMut<'_>> {
[INFO] [stdout]     |                                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:621:20
[INFO] [stdout]     |
[INFO] [stdout] 621 |     pub fn columns(&self) -> impl IntoIterator<Item = Column> {
[INFO] [stdout]     |                    ^^^^^ the lifetime is elided here  ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 621 |     pub fn columns(&self) -> impl IntoIterator<Item = Column<'_>> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:628:17
[INFO] [stdout]     |
[INFO] [stdout] 628 |     pub fn rows(&self) -> impl IntoIterator<Item = Row> {
[INFO] [stdout]     |                 ^^^^^ the lifetime is elided here  ^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 628 |     pub fn rows(&self) -> impl IntoIterator<Item = Row<'_>> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:635:19
[INFO] [stdout]     |
[INFO] [stdout] 635 |     pub fn houses(&self) -> impl IntoIterator<Item = House> {
[INFO] [stdout]     |                   ^^^^^ the lifetime is elided here  ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 635 |     pub fn houses(&self) -> impl IntoIterator<Item = House<'_>> {
[INFO] [stdout]     |                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_board`
[INFO] [stdout]   --> src/advanced_solver/techniques/hidden_pair.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn apply_to(&self, game_board: &GameBoard) -> Result<GameBoard, ()> {
[INFO] [stdout]    |                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_board`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solution`
[INFO] [stdout]    --> src/game_creator/random_create_game.rs:216:13
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let solution = game_board.clone();
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/game_creator/byte_string_create_game.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ByteStringFormError(String);
[INFO] [stdout]    |            ------------------- ^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `ByteStringFormError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_from_vec` is never used
[INFO] [stdout]   --> src/game_creator/random_create_game.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn take_from_vec<T, R : Rng>(vector: &mut Vec<T>, rng: &mut R) -> Option<T> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:536:16
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn row(&self, index: usize) -> Option<Row> {
[INFO] [stdout]     |                ^^^^^                          ^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 536 |     pub fn row(&self, index: usize) -> Option<Row<'_>> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:544:20
[INFO] [stdout]     |
[INFO] [stdout] 544 |     pub fn row_mut(&mut self, index: usize) -> Option<RowMut> {
[INFO] [stdout]     |                    ^^^^^^^^^                          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 544 |     pub fn row_mut(&mut self, index: usize) -> Option<RowMut<'_>> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:552:19
[INFO] [stdout]     |
[INFO] [stdout] 552 |     pub fn column(&self, index: usize) -> Option<Column> {
[INFO] [stdout]     |                   ^^^^^                          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 552 |     pub fn column(&self, index: usize) -> Option<Column<'_>> {
[INFO] [stdout]     |                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:572:23
[INFO] [stdout]     |
[INFO] [stdout] 572 |     pub fn column_mut(&mut self, index: usize) -> Option<ColumnMut> {
[INFO] [stdout]     |                       ^^^^^^^^^                          ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 572 |     pub fn column_mut(&mut self, index: usize) -> Option<ColumnMut<'_>> {
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:580:18
[INFO] [stdout]     |
[INFO] [stdout] 580 |     pub fn house(&self, x: usize, y: usize) -> Option<House> {
[INFO] [stdout]     |                  ^^^^^ the lifetime is elided here    ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 580 |     pub fn house(&self, x: usize, y: usize) -> Option<House<'_>> {
[INFO] [stdout]     |                                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:604:22
[INFO] [stdout]     |
[INFO] [stdout] 604 |     pub fn house_mut(&mut self, x: usize, y: usize) -> Option<HouseMut> {
[INFO] [stdout]     |                      ^^^^^^^^^ the lifetime is elided here    ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 604 |     pub fn house_mut(&mut self, x: usize, y: usize) -> Option<HouseMut<'_>> {
[INFO] [stdout]     |                                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:621:20
[INFO] [stdout]     |
[INFO] [stdout] 621 |     pub fn columns(&self) -> impl IntoIterator<Item = Column> {
[INFO] [stdout]     |                    ^^^^^ the lifetime is elided here  ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 621 |     pub fn columns(&self) -> impl IntoIterator<Item = Column<'_>> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:628:17
[INFO] [stdout]     |
[INFO] [stdout] 628 |     pub fn rows(&self) -> impl IntoIterator<Item = Row> {
[INFO] [stdout]     |                 ^^^^^ the lifetime is elided here  ^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 628 |     pub fn rows(&self) -> impl IntoIterator<Item = Row<'_>> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/game_board.rs:635:19
[INFO] [stdout]     |
[INFO] [stdout] 635 |     pub fn houses(&self) -> impl IntoIterator<Item = House> {
[INFO] [stdout]     |                   ^^^^^ the lifetime is elided here  ^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 635 |     pub fn houses(&self) -> impl IntoIterator<Item = House<'_>> {
[INFO] [stdout]     |                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v6.2.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "235115c1dc69613926bbe023af586a7a0ab114e541b05fa6bf8368fad509e10f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "235115c1dc69613926bbe023af586a7a0ab114e541b05fa6bf8368fad509e10f", kill_on_drop: false }`
[INFO] [stdout] 235115c1dc69613926bbe023af586a7a0ab114e541b05fa6bf8368fad509e10f
