[INFO] cloning repository https://github.com/sivertjoe/Future-chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sivertjoe/Future-chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivertjoe%2FFuture-chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivertjoe%2FFuture-chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 369d2cc1e6a7dd3d07315fa947ea9ac852ccca9b
[INFO] testing sivertjoe/Future-chess against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsivertjoe%2FFuture-chess" "/workspace/builds/worker-93/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-93/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sivertjoe/Future-chess on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sivertjoe/Future-chess
[INFO] finished tweaking git repo https://github.com/sivertjoe/Future-chess
[INFO] tweaked toml for git repo https://github.com/sivertjoe/Future-chess written to /workspace/builds/worker-93/source/Cargo.toml
[INFO] crate git repo https://github.com/sivertjoe/Future-chess already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v2.1.2
[INFO] [stderr]   Downloaded num-bigint v0.2.1
[INFO] [stderr]   Downloaded futures v0.1.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2539306862ba114a2ac5c6e189fb2020750c9198e5f60c34af19ccfa172ea4d7
[INFO] running `Command { std: "docker" "start" "-a" "2539306862ba114a2ac5c6e189fb2020750c9198e5f60c34af19ccfa172ea4d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2539306862ba114a2ac5c6e189fb2020750c9198e5f60c34af19ccfa172ea4d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2539306862ba114a2ac5c6e189fb2020750c9198e5f60c34af19ccfa172ea4d7", kill_on_drop: false }`
[INFO] [stdout] 2539306862ba114a2ac5c6e189fb2020750c9198e5f60c34af19ccfa172ea4d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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=warn" "-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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4a8555fdf97e8eb36c258c641c83e91beda13a5f9dff46090e4326050fb82ab
[INFO] running `Command { std: "docker" "start" "-a" "c4a8555fdf97e8eb36c258c641c83e91beda13a5f9dff46090e4326050fb82ab", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sfml-build v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling csfml-system-sys v0.4.0
[INFO] [stderr]    Compiling csfml-window-sys v0.4.0
[INFO] [stderr]    Compiling csfml-audio-sys v0.4.0
[INFO] [stderr]    Compiling csfml-graphics-sys v0.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.4
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling sfml v0.14.0
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling chess_v2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll, vec_remove_item)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/pieces.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub rule: Box<ChessPiece>,
[INFO] [stdout]    |                   ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:26:25
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(typ: Box<ChessPiece>, color: Color) -> Piece<'a> 
[INFO] [stdout]    |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:91:25
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]    |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:121:25
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]     |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:150:25
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]     |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:180:25
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]     |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:209:25
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]     |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/pieces.rs:238:25
[INFO] [stdout]     |
[INFO] [stdout] 238 |     pub fn new() -> Box<ChessPiece> 
[INFO] [stdout]     |                         ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/new_piece_creator.rs:21:37
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn m_create_kings<'a>(set: &mut ChessSet)
[INFO] [stdout]    |                                     ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:27:36
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn p_create_king<'a>(set: &mut ChessSet, text: _Index<Color>)
[INFO] [stdout]    |                                    ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:36:34
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn m_create_queens(set: &mut ChessSet)
[INFO] [stdout]    |                                  ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:42:33
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn p_create_queen(set: &mut ChessSet, text: _Index<Color>)
[INFO] [stdout]    |                                 ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:51:33
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn m_create_pawns(set: &mut ChessSet)
[INFO] [stdout]    |                                 ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn p_create_pawns(set: &mut ChessSet, color: Color)
[INFO] [stdout]    |                             ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:72:34
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn m_create_bishop(set: &mut ChessSet)
[INFO] [stdout]    |                                  ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:79:33
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn m_create_rooks(set: &mut ChessSet)
[INFO] [stdout]    |                                 ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:87:35
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub fn m_create_knights(set: &mut ChessSet)
[INFO] [stdout]    |                                   ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:96:15
[INFO] [stdout]    |
[INFO] [stdout] 96 |     set: &mut ChessSet,
[INFO] [stdout]    |               ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:99:19
[INFO] [stdout]    |
[INFO] [stdout] 99 |     create_func: &Fn() -> Box<ChessPiece>)
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> Box<ChessPiece>`
[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/new_piece_creator.rs:99:31
[INFO] [stdout]    |
[INFO] [stdout] 99 |     create_func: &Fn() -> Box<ChessPiece>)
[INFO] [stdout]    |                               ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/new_piece_creator.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |     set: &mut ChessSet, 
[INFO] [stdout]     |               ^^^^^^^^ help: use `dyn`: `dyn ChessSet`
[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/new_piece_creator.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |     create_func: &Fn() -> Box<ChessPiece>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> Box<ChessPiece>`
[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/new_piece_creator.rs:111:31
[INFO] [stdout]     |
[INFO] [stdout] 111 |     create_func: &Fn() -> Box<ChessPiece>
[INFO] [stdout]     |                               ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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/new_piece_creator.rs:123:29
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn _create_piece<'a>(p: Box<ChessPiece>, color: Color) -> FutureResult<Piece<'a>, ()>
[INFO] [stdout]     |                             ^^^^^^^^^^ help: use `dyn`: `dyn ChessPiece`
[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: unnecessary trailing semicolon
[INFO] [stdout]   --> src/mov_functions/rook.rs:71:28
[INFO] [stdout]    |
[INFO] [stdout] 71 |     return future::err(());;
[INFO] [stdout]    |                            ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/highlight.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         target: &mut sfml::graphics::RenderTarget,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn sfml::graphics::RenderTarget`
[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/arrow.rs:94:22
[INFO] [stdout]    |
[INFO] [stdout] 94 |         target: &mut sfml::graphics::RenderTarget,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn sfml::graphics::RenderTarget`
[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: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/chess_set.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn place(&mut self, Piece<'a>, Square);
[INFO] [stdout]    |                         ^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: Piece<'a>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/chess_set.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn place(&mut self, Piece<'a>, Square);
[INFO] [stdout]    |                                    ^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: Square`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/chess_set.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn record(&mut self, Move);
[INFO] [stdout]    |                          ^^^^ help: try naming the parameter or explicitly ignoring it: `_: Move`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/chess_set.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn get(&self, usize) -> Option<&Move>;
[INFO] [stdout]    |                   ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<Highlight<'a>>` in the current scope
[INFO] [stdout]   --> src/game.rs:87:40
[INFO] [stdout]    |
[INFO] [stdout] 87 |             if self.highlighed_squares.remove_item(&highlight).is_none()
[INFO] [stdout]    |                                        ^^^^^^^^^^^ method not found in `Vec<Highlight<'a>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<Arrow<'a>>` in the current scope
[INFO] [stdout]   --> src/game.rs:97:32
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 if self.arrows.remove_item(&arrow).is_none()
[INFO] [stdout]    |                                ^^^^^^^^^^^ method not found in `Vec<Arrow<'a>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chess_v2` due to 4 previous errors; 31 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c4a8555fdf97e8eb36c258c641c83e91beda13a5f9dff46090e4326050fb82ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4a8555fdf97e8eb36c258c641c83e91beda13a5f9dff46090e4326050fb82ab", kill_on_drop: false }`
[INFO] [stdout] c4a8555fdf97e8eb36c258c641c83e91beda13a5f9dff46090e4326050fb82ab
