[INFO] cloning repository https://github.com/neodymium6/rust_reveri
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neodymium6/rust_reveri" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneodymium6%2Frust_reveri", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneodymium6%2Frust_reveri'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b55417a477b54504da83ea4c96a18295e8222e9a
[INFO] checking neodymium6/rust_reveri against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneodymium6%2Frust_reveri" "/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/neodymium6/rust_reveri
[INFO] finished tweaking git repo https://github.com/neodymium6/rust_reveri
[INFO] tweaked toml for git repo https://github.com/neodymium6/rust_reveri written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/neodymium6/rust_reveri on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/neodymium6/rust_reveri 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 077518626d88630173ce96f3a49ecd68f8e5695fc9d5940dd8fdbbc127e306cc
[INFO] running `Command { std: "docker" "start" "-a" "077518626d88630173ce96f3a49ecd68f8e5695fc9d5940dd8fdbbc127e306cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "077518626d88630173ce96f3a49ecd68f8e5695fc9d5940dd8fdbbc127e306cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "077518626d88630173ce96f3a49ecd68f8e5695fc9d5940dd8fdbbc127e306cc", kill_on_drop: false }`
[INFO] [stdout] 077518626d88630173ce96f3a49ecd68f8e5695fc9d5940dd8fdbbc127e306cc
[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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bba9ae465f51108d928a33cc5027676879f8c5c85634a1ac67b9cb5a739209f
[INFO] running `Command { std: "docker" "start" "-a" "2bba9ae465f51108d928a33cc5027676879f8c5c85634a1ac67b9cb5a739209f", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]    Compiling portable-atomic v1.10.0
[INFO] [stderr]     Checking unicode-width v0.2.0
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]     Checking unindent v0.2.3
[INFO] [stderr]    Compiling pyo3-build-config v0.23.3
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking console v0.15.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking indicatif v0.17.9
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling pyo3-macros-backend v0.23.3
[INFO] [stderr]    Compiling pyo3-ffi v0.23.3
[INFO] [stderr]    Compiling pyo3 v0.23.3
[INFO] [stderr]     Checking rust_reversi_core v1.0.1
[INFO] [stderr]    Compiling pyo3-macros v0.23.3
[INFO] [stderr]     Checking rust_reversi v1.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<(u64, u64, board::Turn), Infallible>
[INFO] [stdout]   --> src/board/mod.rs:77:28
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn get_board(&self) -> (u64, u64, Turn) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<board::Turn, Infallible>
[INFO] [stdout]   --> src/board/mod.rs:85:27
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn get_turn(&self) -> Turn {
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:147:35
[INFO] [stdout]     |
[INFO] [stdout] 147 |     fn player_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:151:37
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn opponent_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:155:34
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn black_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:159:34
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn white_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:163:28
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn piece_sum(&self) -> i32 {
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:167:33
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn diff_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u64, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:171:38
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn get_legal_moves(&mut self) -> u64 {
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<usize>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:175:42
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn get_legal_moves_vec(&mut self) -> Vec<usize> {
[INFO] [stdout]     |                                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<bool>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:179:41
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn get_legal_moves_tf(&mut self) -> Vec<bool> {
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:183:48
[INFO] [stdout]     |
[INFO] [stdout] 183 |     fn is_legal_move(&mut self, pos: usize) -> bool {
[INFO] [stdout]     |                                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<Vec<board::Board>>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:187:39
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_child_boards(&mut self) -> Option<Vec<Board>> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:211:26
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn is_pass(&self) -> bool {
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:215:31
[INFO] [stdout]     |
[INFO] [stdout] 215 |     fn is_game_over(&self) -> bool {
[INFO] [stdout]     |                               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<board::Board, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:279:24
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn clone(&self) -> Self {
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize, usize), Infallible>
[INFO] [stdout]   --> src/arena/mod.rs:43:28
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn get_stats(&self) -> (usize, usize, usize) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize), Infallible>
[INFO] [stdout]   --> src/arena/mod.rs:47:29
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_pieces(&self) -> (usize, usize) {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize, usize), Infallible>
[INFO] [stdout]    --> src/arena/mod.rs:156:28
[INFO] [stdout]     |
[INFO] [stdout] 156 |     fn get_stats(&self) -> (usize, usize, usize) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize), Infallible>
[INFO] [stdout]    --> src/arena/mod.rs:160:29
[INFO] [stdout]     |
[INFO] [stdout] 160 |     fn get_pieces(&self) -> (usize, usize) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]   --> src/search/mod.rs:83:46
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn evaluate(&self, board: &mut Board) -> i32 {
[INFO] [stdout]    |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:146:46
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:150:76
[INFO] [stdout]     |
[INFO] [stdout] 150 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:155:54
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:253:46
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn evaluate(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:273:46
[INFO] [stdout]     |
[INFO] [stdout] 273 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:277:76
[INFO] [stdout]     |
[INFO] [stdout] 277 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:282:54
[INFO] [stdout]     |
[INFO] [stdout] 282 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:301:46
[INFO] [stdout]     |
[INFO] [stdout] 301 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:305:76
[INFO] [stdout]     |
[INFO] [stdout] 305 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:310:54
[INFO] [stdout]     |
[INFO] [stdout] 310 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_reversi` (lib test) due to 31 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<(u64, u64, board::Turn), Infallible>
[INFO] [stdout]   --> src/board/mod.rs:77:28
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn get_board(&self) -> (u64, u64, Turn) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<board::Turn, Infallible>
[INFO] [stdout]   --> src/board/mod.rs:85:27
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn get_turn(&self) -> Turn {
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:147:35
[INFO] [stdout]     |
[INFO] [stdout] 147 |     fn player_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:151:37
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn opponent_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:155:34
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn black_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:159:34
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn white_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:163:28
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn piece_sum(&self) -> i32 {
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:167:33
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn diff_piece_num(&self) -> i32 {
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u64, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:171:38
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn get_legal_moves(&mut self) -> u64 {
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<usize>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:175:42
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn get_legal_moves_vec(&mut self) -> Vec<usize> {
[INFO] [stdout]     |                                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<bool>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:179:41
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn get_legal_moves_tf(&mut self) -> Vec<bool> {
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:183:48
[INFO] [stdout]     |
[INFO] [stdout] 183 |     fn is_legal_move(&mut self, pos: usize) -> bool {
[INFO] [stdout]     |                                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<Vec<board::Board>>, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:187:39
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_child_boards(&mut self) -> Option<Vec<Board>> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:211:26
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn is_pass(&self) -> bool {
[INFO] [stdout]     |                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:215:31
[INFO] [stdout]     |
[INFO] [stdout] 215 |     fn is_game_over(&self) -> bool {
[INFO] [stdout]     |                               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<board::Board, Infallible>
[INFO] [stdout]    --> src/board/mod.rs:279:24
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn clone(&self) -> Self {
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize, usize), Infallible>
[INFO] [stdout]   --> src/arena/mod.rs:43:28
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn get_stats(&self) -> (usize, usize, usize) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize), Infallible>
[INFO] [stdout]   --> src/arena/mod.rs:47:29
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn get_pieces(&self) -> (usize, usize) {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize, usize), Infallible>
[INFO] [stdout]    --> src/arena/mod.rs:156:28
[INFO] [stdout]     |
[INFO] [stdout] 156 |     fn get_stats(&self) -> (usize, usize, usize) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<(usize, usize), Infallible>
[INFO] [stdout]    --> src/arena/mod.rs:160:29
[INFO] [stdout]     |
[INFO] [stdout] 160 |     fn get_pieces(&self) -> (usize, usize) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]   --> src/search/mod.rs:83:46
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn evaluate(&self, board: &mut Board) -> i32 {
[INFO] [stdout]    |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:146:46
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:150:76
[INFO] [stdout]     |
[INFO] [stdout] 150 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:155:54
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:253:46
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn evaluate(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:273:46
[INFO] [stdout]     |
[INFO] [stdout] 273 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:277:76
[INFO] [stdout]     |
[INFO] [stdout] 277 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:282:54
[INFO] [stdout]     |
[INFO] [stdout] 282 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:301:46
[INFO] [stdout]     |
[INFO] [stdout] 301 |     fn get_move(&self, board: &mut Board) -> Option<usize> {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<usize>, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:305:76
[INFO] [stdout]     |
[INFO] [stdout] 305 |     fn get_move_with_timeout(&self, board: &mut Board, timeout_ms: u64) -> Option<usize> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/search/mod.rs:310:54
[INFO] [stdout]     |
[INFO] [stdout] 310 |     fn get_search_score(&self, board: &mut Board) -> f64 {
[INFO] [stdout]     |                                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_reversi` (lib) due to 31 previous errors
[INFO] running `Command { std: "docker" "inspect" "2bba9ae465f51108d928a33cc5027676879f8c5c85634a1ac67b9cb5a739209f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bba9ae465f51108d928a33cc5027676879f8c5c85634a1ac67b9cb5a739209f", kill_on_drop: false }`
[INFO] [stdout] 2bba9ae465f51108d928a33cc5027676879f8c5c85634a1ac67b9cb5a739209f
