[INFO] cloning repository https://github.com/sssilver/tetrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sssilver/tetrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsssilver%2Ftetrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsssilver%2Ftetrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42d7e5cc34812b22e7ae4da88c9672aa3fab71f3
[INFO] testing sssilver/tetrust against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsssilver%2Ftetrust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sssilver/tetrust on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sssilver/tetrust
[INFO] finished tweaking git repo https://github.com/sssilver/tetrust
[INFO] tweaked toml for git repo https://github.com/sssilver/tetrust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/sssilver/tetrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded log v0.3.6
[INFO] [stderr]   Downloaded rand v0.3.15
[INFO] [stderr]   Downloaded ncurses v5.84.0
[INFO] [stderr]   Downloaded gcc v0.3.38
[INFO] [stderr]   Downloaded pdcurses-sys v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.17
[INFO] [stderr]   Downloaded pancurses v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e90d7541f661d74bed4cd5111b4389e7ff8abd66c7afd97f05b4eec9977e2ea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3e90d7541f661d74bed4cd5111b4389e7ff8abd66c7afd97f05b4eec9977e2ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e90d7541f661d74bed4cd5111b4389e7ff8abd66c7afd97f05b4eec9977e2ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e90d7541f661d74bed4cd5111b4389e7ff8abd66c7afd97f05b4eec9977e2ea", kill_on_drop: false }`
[INFO] [stdout] 3e90d7541f661d74bed4cd5111b4389e7ff8abd66c7afd97f05b4eec9977e2ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 47e1c2ef15e02491c85c511e90acdfc90efe2502a33be4d5828dc30f13fc4e78
[INFO] running `Command { std: "docker" "start" "-a" "47e1c2ef15e02491c85c511e90acdfc90efe2502a33be4d5828dc30f13fc4e78", kill_on_drop: false }`
[INFO] [stderr]    Compiling ncurses v5.84.0
[INFO] [stderr]    Compiling pancurses v0.7.0
[INFO] [stderr]    Compiling tetrust v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Point`, `Renderer`
[INFO] [stdout]  --> src/game/board.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use renderer::{Point, Renderer};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/game/polyomino.rs:104:49
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn render(&self, pos: Point, renderer: &mut Renderer) {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Renderable`
[INFO] [stdout]   --> src/game/mod.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | use renderer::{Renderable, Renderer};
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |     renderer: &'a mut Renderer,
[INFO] [stdout]    |                       ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |     input: &'a mut Input
[INFO] [stdout]    |                    ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:30:50
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:30:75
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stdout]    |                                                                           ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/renderer.rs:16:49
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn render(&self, pos: Point, renderer: &mut Renderer);
[INFO] [stdout]    |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `block`
[INFO] [stdout]   --> src/curses_renderer.rs:37:30
[INFO] [stdout]    |
[INFO] [stdout] 37 |         while let Some((pos, block)) = self.blocks.pop() {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_block`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/game/polyomino.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |         for i in 0..4 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SubsystemStartupFailure`
[INFO] [stdout]  --> src/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     SubsystemStartupFailure
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Coord`
[INFO] [stdout]  --> src/game/polyomino.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | type Coord = (i8, i8);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotate`
[INFO] [stdout]   --> src/game/polyomino.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn rotate(&mut self, clockwise: bool) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Point`
[INFO] [stdout]   --> src/game/mod.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | type Point = (u8, u8);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `state`
[INFO] [stdout]   --> src/game/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     state: state::State,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `complexity`
[INFO] [stdout]   --> src/game/mod.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     complexity: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pieces`
[INFO] [stdout]   --> src/game/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pieces: Vec<polyomino::Polyomino>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         self.input.execute();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.renderer.execute();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "47e1c2ef15e02491c85c511e90acdfc90efe2502a33be4d5828dc30f13fc4e78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47e1c2ef15e02491c85c511e90acdfc90efe2502a33be4d5828dc30f13fc4e78", kill_on_drop: false }`
[INFO] [stdout] 47e1c2ef15e02491c85c511e90acdfc90efe2502a33be4d5828dc30f13fc4e78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 961f0e8a09b56cd995b3816e7a8ed1de9b307e4f008b1ae83c739406bbc04271
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "961f0e8a09b56cd995b3816e7a8ed1de9b307e4f008b1ae83c739406bbc04271", kill_on_drop: false }`
[INFO] [stderr]    Compiling tetrust v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Point`, `Renderer`
[INFO] [stdout]  --> src/game/board.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use renderer::{Point, Renderer};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/game/polyomino.rs:104:49
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn render(&self, pos: Point, renderer: &mut Renderer) {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Renderable`
[INFO] [stdout]   --> src/game/mod.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | use renderer::{Renderable, Renderer};
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |     renderer: &'a mut Renderer,
[INFO] [stdout]    |                       ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |     input: &'a mut Input
[INFO] [stdout]    |                    ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:30:50
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/game/mod.rs:30:75
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stdout]    |                                                                           ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/renderer.rs:16:49
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn render(&self, pos: Point, renderer: &mut Renderer);
[INFO] [stdout]    |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `block`
[INFO] [stdout]   --> src/curses_renderer.rs:37:30
[INFO] [stdout]    |
[INFO] [stdout] 37 |         while let Some((pos, block)) = self.blocks.pop() {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_block`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/game/polyomino.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |         for i in 0..4 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SubsystemStartupFailure`
[INFO] [stdout]  --> src/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     SubsystemStartupFailure
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Coord`
[INFO] [stdout]  --> src/game/polyomino.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | type Coord = (i8, i8);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotate`
[INFO] [stdout]   --> src/game/polyomino.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn rotate(&mut self, clockwise: bool) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Point`
[INFO] [stdout]   --> src/game/mod.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | type Point = (u8, u8);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `state`
[INFO] [stdout]   --> src/game/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     state: state::State,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `complexity`
[INFO] [stdout]   --> src/game/mod.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     complexity: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pieces`
[INFO] [stdout]   --> src/game/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pieces: Vec<polyomino::Polyomino>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         self.input.execute();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/game/mod.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.renderer.execute();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "961f0e8a09b56cd995b3816e7a8ed1de9b307e4f008b1ae83c739406bbc04271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "961f0e8a09b56cd995b3816e7a8ed1de9b307e4f008b1ae83c739406bbc04271", kill_on_drop: false }`
[INFO] [stdout] 961f0e8a09b56cd995b3816e7a8ed1de9b307e4f008b1ae83c739406bbc04271
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b752b08b88563f17c04d53272b17a5cf21800bf854db6098be14c7e2a11161f6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b752b08b88563f17c04d53272b17a5cf21800bf854db6098be14c7e2a11161f6", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Point`, `Renderer`
[INFO] [stderr]  --> src/game/board.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use renderer::{Point, Renderer};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/game/polyomino.rs:104:49
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn render(&self, pos: Point, renderer: &mut Renderer) {
[INFO] [stderr]     |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Renderable`
[INFO] [stderr]   --> src/game/mod.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 | use renderer::{Renderable, Renderer};
[INFO] [stderr]    |                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:24:23
[INFO] [stderr]    |
[INFO] [stderr] 24 |     renderer: &'a mut Renderer,
[INFO] [stderr]    |                       ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:25:20
[INFO] [stderr]    |
[INFO] [stderr] 25 |     input: &'a mut Input
[INFO] [stderr]    |                    ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:30:50
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/game/mod.rs:30:75
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(complexity: u8, renderer: &'a mut Renderer, input: &'a mut Input) -> Game<'a> {
[INFO] [stderr]    |                                                                           ^^^^^ help: use `dyn`: `dyn Input`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/renderer.rs:16:49
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn render(&self, pos: Point, renderer: &mut Renderer);
[INFO] [stderr]    |                                                 ^^^^^^^^ help: use `dyn`: `dyn Renderer`
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `block`
[INFO] [stderr]   --> src/curses_renderer.rs:37:30
[INFO] [stderr]    |
[INFO] [stderr] 37 |         while let Some((pos, block)) = self.blocks.pop() {
[INFO] [stderr]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_block`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/game/polyomino.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |         for i in 0..4 {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SubsystemStartupFailure`
[INFO] [stderr]  --> src/error.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     SubsystemStartupFailure
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Coord`
[INFO] [stderr]  --> src/game/polyomino.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | type Coord = (i8, i8);
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `rotate`
[INFO] [stderr]   --> src/game/polyomino.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn rotate(&mut self, clockwise: bool) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Point`
[INFO] [stderr]   --> src/game/mod.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | type Point = (u8, u8);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `state`
[INFO] [stderr]   --> src/game/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     state: state::State,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `complexity`
[INFO] [stderr]   --> src/game/mod.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     complexity: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pieces`
[INFO] [stderr]   --> src/game/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pieces: Vec<polyomino::Polyomino>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/game/mod.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         self.input.execute();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/game/mod.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         self.renderer.execute();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `tetrust` (bin "tetrust" test) generated 19 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tetrust-732b8f86b7393a8d)
[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" "b752b08b88563f17c04d53272b17a5cf21800bf854db6098be14c7e2a11161f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b752b08b88563f17c04d53272b17a5cf21800bf854db6098be14c7e2a11161f6", kill_on_drop: false }`
[INFO] [stdout] b752b08b88563f17c04d53272b17a5cf21800bf854db6098be14c7e2a11161f6