[INFO] cloning repository https://github.com/tubo28/reversi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tubo28/reversi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftubo28%2Freversi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftubo28%2Freversi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4f9131cf0c9c3b291dd706cf226224e5c5ee05b
[INFO] testing tubo28/reversi against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftubo28%2Freversi" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tubo28/reversi on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tubo28/reversi
[INFO] finished tweaking git repo https://github.com/tubo28/reversi
[INFO] tweaked toml for git repo https://github.com/tubo28/reversi written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate git repo https://github.com/tubo28/reversi already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc240bc051adbba7bdb5cddbea94321799786f246986c06cbc49eadc7e0650f4
[INFO] running `Command { std: "docker" "start" "-a" "cc240bc051adbba7bdb5cddbea94321799786f246986c06cbc49eadc7e0650f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc240bc051adbba7bdb5cddbea94321799786f246986c06cbc49eadc7e0650f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc240bc051adbba7bdb5cddbea94321799786f246986c06cbc49eadc7e0650f4", kill_on_drop: false }`
[INFO] [stdout] cc240bc051adbba7bdb5cddbea94321799786f246986c06cbc49eadc7e0650f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3245132d4d568664c5b2ec80457b146dd504d88edc68b44ab7b09afe638cbde8
[INFO] running `Command { std: "docker" "start" "-a" "3245132d4d568664c5b2ec80457b146dd504d88edc68b44ab7b09afe638cbde8", kill_on_drop: false }`
[INFO] [stderr]    Compiling reversi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:208:68
[INFO] [stdout]     |
[INFO] [stdout] 208 |         fn get_rev(board: &Board, m: Mask, valid: Mask, transfer: &Fn(Mask) -> Mask) -> Mask {
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Mask) -> Mask`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:565:16
[INFO] [stdout]     |
[INFO] [stdout] 565 |     black: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:566:16
[INFO] [stdout]     |
[INFO] [stdout] 566 |     white: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:27
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:47
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                                               ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/stat.rs:26:42
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stdout]    |                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/stat.rs:26:55
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stdout]    |                                                       ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:208:68
[INFO] [stdout]     |
[INFO] [stdout] 208 |         fn get_rev(board: &Board, m: Mask, valid: Mask, transfer: &Fn(Mask) -> Mask) -> Mask {
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Mask) -> Mask`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:565:16
[INFO] [stdout]     |
[INFO] [stdout] 565 |     black: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:566:16
[INFO] [stdout]     |
[INFO] [stdout] 566 |     white: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:27
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:47
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                                               ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:15:58
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:16:70
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:17:61
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:18:50
[INFO] [stdout]    |
[INFO] [stdout] 18 |         _ => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                  ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:24:58
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:25:70
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:26:61
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:27:62
[INFO] [stdout]    |
[INFO] [stdout] 27 |         _ => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                              ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/reversi.rs:479:12
[INFO] [stdout]     |
[INFO] [stdout] 479 |     pub fn new() -> HumanPlayer {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.88s
[INFO] running `Command { std: "docker" "inspect" "3245132d4d568664c5b2ec80457b146dd504d88edc68b44ab7b09afe638cbde8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3245132d4d568664c5b2ec80457b146dd504d88edc68b44ab7b09afe638cbde8", kill_on_drop: false }`
[INFO] [stdout] 3245132d4d568664c5b2ec80457b146dd504d88edc68b44ab7b09afe638cbde8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 776794432c031bf6c7d0e36adeb43d025eb399eb153a768057762d391eff6abc
[INFO] running `Command { std: "docker" "start" "-a" "776794432c031bf6c7d0e36adeb43d025eb399eb153a768057762d391eff6abc", kill_on_drop: false }`
[INFO] [stderr]    Compiling reversi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:208:68
[INFO] [stdout]     |
[INFO] [stdout] 208 |         fn get_rev(board: &Board, m: Mask, valid: Mask, transfer: &Fn(Mask) -> Mask) -> Mask {
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Mask) -> Mask`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:208:68
[INFO] [stdout]     |
[INFO] [stdout] 208 |         fn get_rev(board: &Board, m: Mask, valid: Mask, transfer: &Fn(Mask) -> Mask) -> Mask {
[INFO] [stdout]     |                                                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Mask) -> Mask`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:565:16
[INFO] [stdout]     |
[INFO] [stdout] 565 |     black: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:565:16
[INFO] [stdout]     |
[INFO] [stdout] 565 |     black: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:566:16
[INFO] [stdout]     |
[INFO] [stdout] 566 |     white: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:27
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:47
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                                               ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:15:58
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:16:70
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:17:61
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:18:50
[INFO] [stdout]    |
[INFO] [stdout] 18 |         _ => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                  ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:24:58
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stdout]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:25:70
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:566:16
[INFO] [stdout]     |
[INFO] [stdout] 566 |     white: Box<Player>,
[INFO] [stdout]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:26:61
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:27:62
[INFO] [stdout]    |
[INFO] [stdout] 27 |         _ => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stdout]    |                                                              ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:27
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reversi.rs:574:47
[INFO] [stdout]     |
[INFO] [stdout] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stdout]     |                                               ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/stat.rs:26:42
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stdout]    |                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/stat.rs:26:55
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stdout]    |                                                       ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/reversi.rs:479:12
[INFO] [stdout]     |
[INFO] [stdout] 479 |     pub fn new() -> HumanPlayer {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "776794432c031bf6c7d0e36adeb43d025eb399eb153a768057762d391eff6abc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "776794432c031bf6c7d0e36adeb43d025eb399eb153a768057762d391eff6abc", kill_on_drop: false }`
[INFO] [stdout] 776794432c031bf6c7d0e36adeb43d025eb399eb153a768057762d391eff6abc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9726edacb45c21e3f47e458e7342d9f388eb54927fc722b68e80463e6d55ac88
[INFO] running `Command { std: "docker" "start" "-a" "9726edacb45c21e3f47e458e7342d9f388eb54927fc722b68e80463e6d55ac88", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reversi.rs:208:68
[INFO] [stderr]     |
[INFO] [stderr] 208 |         fn get_rev(board: &Board, m: Mask, valid: Mask, transfer: &Fn(Mask) -> Mask) -> Mask {
[INFO] [stderr]     |                                                                    ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Mask) -> Mask`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reversi.rs:565:16
[INFO] [stderr]     |
[INFO] [stderr] 565 |     black: Box<Player>,
[INFO] [stderr]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reversi.rs:566:16
[INFO] [stderr]     |
[INFO] [stderr] 566 |     white: Box<Player>,
[INFO] [stderr]     |                ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reversi.rs:574:27
[INFO] [stderr]     |
[INFO] [stderr] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stderr]     |                           ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reversi.rs:574:47
[INFO] [stderr]     |
[INFO] [stderr] 574 |     pub fn new(black: Box<Player>, white: Box<Player>) -> GameManager {
[INFO] [stderr]     |                                               ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/stat.rs:26:42
[INFO] [stderr]    |
[INFO] [stderr] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stderr]    |                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/stat.rs:26:55
[INFO] [stderr]    |
[INFO] [stderr] 26 |                 let (black, white): (Box<Player>, Box<Player>) = if seed < num_games / 2 {
[INFO] [stderr]    |                                                       ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/reversi.rs:479:12
[INFO] [stderr]     |
[INFO] [stderr] 479 |     pub fn new() -> HumanPlayer {
[INFO] [stderr]     |            ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `reversi` (bin "stat" test) generated 8 warnings
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:15:58
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stderr]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:16:70
[INFO] [stderr]    |
[INFO] [stderr] 16 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stderr]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:17:61
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stderr]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:18:50
[INFO] [stderr]    |
[INFO] [stderr] 18 |         _ => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stderr]    |                                                  ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:24:58
[INFO] [stderr]    |
[INFO] [stderr] 24 |         Some('1') => Box::new(HumanPlayer::new()) as Box<Player>,
[INFO] [stderr]    |                                                          ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:25:70
[INFO] [stderr]    |
[INFO] [stderr] 25 |         Some('2') => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stderr]    |                                                                      ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:26:61
[INFO] [stderr]    |
[INFO] [stderr] 26 |         Some('3') => Box::new(RandomPlayer::new(28)) as Box<Player>,
[INFO] [stderr]    |                                                             ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:27:62
[INFO] [stderr]    |
[INFO] [stderr] 27 |         _ => Box::new(AlphaBetaSearchPlayer::new(28)) as Box<Player>,
[INFO] [stderr]    |                                                              ^^^^^^ help: use `dyn`: `dyn Player`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `reversi` (bin "main" test) generated 13 warnings (5 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-6a5c65401b20a3ee)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stat-e01d6e77c0af5a29)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9726edacb45c21e3f47e458e7342d9f388eb54927fc722b68e80463e6d55ac88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9726edacb45c21e3f47e458e7342d9f388eb54927fc722b68e80463e6d55ac88", kill_on_drop: false }`
[INFO] [stdout] 9726edacb45c21e3f47e458e7342d9f388eb54927fc722b68e80463e6d55ac88