[INFO] cloning repository https://github.com/VuHoang19/snake_game [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VuHoang19/snake_game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVuHoang19%2Fsnake_game", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVuHoang19%2Fsnake_game'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 82d96a9f6168ba452edfc23ab0a5af7563bca17e [INFO] testing VuHoang19/snake_game against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVuHoang19%2Fsnake_game" "/workspace/builds/worker-11/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'... [INFO] [stderr] done. 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[INFO] validating manifest of git repo https://github.com/VuHoang19/snake_game on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/VuHoang19/snake_game [INFO] finished tweaking git repo https://github.com/VuHoang19/snake_game [INFO] tweaked toml for git repo https://github.com/VuHoang19/snake_game written to /workspace/builds/worker-11/source/Cargo.toml [INFO] crate git repo https://github.com/VuHoang19/snake_game already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] a7719c0d9f3bab0dec2ba56b1b6bb91d1d634eee7f7f46d455e50d181e63161a [INFO] running `Command { std: "docker" "start" "-a" "a7719c0d9f3bab0dec2ba56b1b6bb91d1d634eee7f7f46d455e50d181e63161a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a7719c0d9f3bab0dec2ba56b1b6bb91d1d634eee7f7f46d455e50d181e63161a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a7719c0d9f3bab0dec2ba56b1b6bb91d1d634eee7f7f46d455e50d181e63161a", kill_on_drop: false }` [INFO] [stdout] a7719c0d9f3bab0dec2ba56b1b6bb91d1d634eee7f7f46d455e50d181e63161a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] b476d23762fd7e8f0c7d34abd9b00a59ad241216be3e7ec9b1f60966fe05b329 [INFO] running `Command { std: "docker" "start" "-a" "b476d23762fd7e8f0c7d34abd9b00a59ad241216be3e7ec9b1f60966fe05b329", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.103 [INFO] [stderr] Compiling proc-macro2 v1.0.29 [INFO] [stderr] Compiling piston-float v0.3.0 [INFO] [stderr] Compiling syn v1.0.80 [INFO] [stderr] Compiling serde v1.0.130 [INFO] [stderr] Compiling token_store v0.1.2 [INFO] [stderr] Compiling pkg-config v0.3.20 [INFO] [stderr] Compiling shader_version v0.3.0 [INFO] [stderr] Compiling interpolation v0.1.0 [INFO] [stderr] Compiling xml-rs v0.7.0 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling stb_truetype v0.3.1 [INFO] [stderr] Compiling inflate v0.3.4 [INFO] [stderr] Compiling deflate v0.7.20 [INFO] [stderr] Compiling gif v0.9.2 [INFO] [stderr] Compiling dlib v0.4.2 [INFO] [stderr] Compiling wayland-sys v0.12.5 [INFO] [stderr] Compiling piston-viewport v0.3.0 [INFO] [stderr] Compiling vecmath v0.3.1 [INFO] [stderr] Compiling crossbeam-channel v0.5.1 [INFO] [stderr] Compiling crossbeam-epoch v0.9.5 [INFO] [stderr] Compiling ordered-float v0.5.2 [INFO] [stderr] Compiling enum_primitive v0.1.1 [INFO] [stderr] Compiling stb_truetype v0.2.8 [INFO] [stderr] Compiling rusttype v0.4.3 [INFO] [stderr] Compiling crossbeam-deque v0.8.1 [INFO] [stderr] Compiling wayland-scanner v0.12.5 [INFO] [stderr] Compiling gl_generator v0.9.0 [INFO] [stderr] Compiling gl_generator v0.8.0 [INFO] [stderr] Compiling x11-dl v2.19.1 [INFO] [stderr] Compiling piston2d-graphics v0.26.0 [INFO] [stderr] Compiling num-iter v0.1.42 [INFO] [stderr] Compiling num-rational v0.1.42 [INFO] [stderr] Compiling quote v1.0.10 [INFO] [stderr] Compiling getrandom v0.2.3 [INFO] [stderr] Compiling memmap v0.6.2 [INFO] [stderr] Compiling num_cpus v1.13.0 [INFO] [stderr] Compiling shared_library v0.1.9 [INFO] [stderr] Compiling rand v0.4.6 [INFO] [stderr] Compiling wayland-client v0.12.5 [INFO] [stderr] Compiling wayland-protocols v0.12.5 [INFO] [stderr] Compiling png v0.11.0 [INFO] [stderr] Compiling rand_core v0.6.3 [INFO] [stderr] Compiling rayon-core v1.9.1 [INFO] [stderr] Compiling osmesa-sys v0.1.2 [INFO] [stderr] Compiling glutin v0.12.2 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling gl v0.10.0 [INFO] [stderr] Compiling rand v0.8.4 [INFO] [stderr] Compiling rayon v1.5.1 [INFO] [stderr] Compiling tempfile v3.2.0 [INFO] [stderr] Compiling wayland-kbd v0.13.1 [INFO] [stderr] Compiling serde_derive v1.0.130 [INFO] [stderr] Compiling jpeg-decoder v0.1.22 [INFO] [stderr] Compiling wayland-window v0.13.3 [INFO] [stderr] Compiling winit v0.10.0 [INFO] [stderr] Compiling image v0.18.0 [INFO] [stderr] Compiling piston2d-opengl_graphics v0.52.1 [INFO] [stderr] Compiling pistoncore-input v0.20.0 [INFO] [stderr] Compiling pistoncore-window v0.31.0 [INFO] [stderr] Compiling pistoncore-event_loop v0.36.0 [INFO] [stderr] Compiling pistoncore-glutin_window v0.45.3 [INFO] [stderr] Compiling piston v0.36.0 [INFO] [stderr] Compiling snake_game v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:40:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 40 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Snake_Piece` should have an upper camel case name [INFO] [stdout] --> src/main.rs:110:12 [INFO] [stdout] | [INFO] [stdout] 110 | pub struct Snake_Piece(u32, u32); [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakePiece` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:114:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 114 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:189:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 189 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/main.rs:44:40 [INFO] [stdout] | [INFO] [stdout] 44 | self.gl.draw(args.viewport(), |c, gl| { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `args` [INFO] [stdout] --> src/main.rs:52:26 [INFO] [stdout] | [INFO] [stdout] 52 | fn update(&mut self, args: &UpdateArgs) -> bool { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_args` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `WIDTH` should have a snake case name [INFO] [stdout] --> src/main.rs:214:9 [INFO] [stdout] | [INFO] [stdout] 214 | let WIDTH = COLS * SQUARE_WIDTH; [INFO] [stdout] | ^^^^^ help: convert the identifier to snake case: `width` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `HEIGHT` should have a snake case name [INFO] [stdout] --> src/main.rs:215:9 [INFO] [stdout] | [INFO] [stdout] 215 | let HEIGHT = ROWS * SQUARE_WIDTH; [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `height` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2m 07s [INFO] running `Command { std: "docker" "inspect" "b476d23762fd7e8f0c7d34abd9b00a59ad241216be3e7ec9b1f60966fe05b329", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b476d23762fd7e8f0c7d34abd9b00a59ad241216be3e7ec9b1f60966fe05b329", kill_on_drop: false }` [INFO] [stdout] b476d23762fd7e8f0c7d34abd9b00a59ad241216be3e7ec9b1f60966fe05b329 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 87b7db9e3a3a2def9a7785385d0af5d5ff81b8d2ff962d1c5330729c1e9586c2 [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" "87b7db9e3a3a2def9a7785385d0af5d5ff81b8d2ff962d1c5330729c1e9586c2", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling snake_game v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:40:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 40 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Snake_Piece` should have an upper camel case name [INFO] [stdout] --> src/main.rs:110:12 [INFO] [stdout] | [INFO] [stdout] 110 | pub struct Snake_Piece(u32, u32); [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakePiece` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:114:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 114 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `graphics` is imported redundantly [INFO] [stdout] --> src/main.rs:189:13 [INFO] [stdout] | [INFO] [stdout] 12 | extern crate graphics; [INFO] [stdout] | ---------------------- the item `graphics` is already imported here [INFO] [stdout] ... [INFO] [stdout] 189 | use graphics; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/main.rs:44:40 [INFO] [stdout] | [INFO] [stdout] 44 | self.gl.draw(args.viewport(), |c, gl| { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `args` [INFO] [stdout] --> src/main.rs:52:26 [INFO] [stdout] | [INFO] [stdout] 52 | fn update(&mut self, args: &UpdateArgs) -> bool { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_args` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `WIDTH` should have a snake case name [INFO] [stdout] --> src/main.rs:214:9 [INFO] [stdout] | [INFO] [stdout] 214 | let WIDTH = COLS * SQUARE_WIDTH; [INFO] [stdout] | ^^^^^ help: convert the identifier to snake case: `width` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `HEIGHT` should have a snake case name [INFO] [stdout] --> src/main.rs:215:9 [INFO] [stdout] | [INFO] [stdout] 215 | let HEIGHT = ROWS * SQUARE_WIDTH; [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `height` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.58s [INFO] running `Command { std: "docker" "inspect" "87b7db9e3a3a2def9a7785385d0af5d5ff81b8d2ff962d1c5330729c1e9586c2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "87b7db9e3a3a2def9a7785385d0af5d5ff81b8d2ff962d1c5330729c1e9586c2", kill_on_drop: false }` [INFO] [stdout] 87b7db9e3a3a2def9a7785385d0af5d5ff81b8d2ff962d1c5330729c1e9586c2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 1802418e652f67d23d1a234676b9df21820181cc737f5a747b2735ae4b0d8023 [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" "1802418e652f67d23d1a234676b9df21820181cc737f5a747b2735ae4b0d8023", kill_on_drop: false }` [INFO] [stderr] warning: the item `graphics` is imported redundantly [INFO] [stderr] --> src/main.rs:40:13 [INFO] [stderr] | [INFO] [stderr] 12 | extern crate graphics; [INFO] [stderr] | ---------------------- the item `graphics` is already imported here [INFO] [stderr] ... [INFO] [stderr] 40 | use graphics; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: type `Snake_Piece` should have an upper camel case name [INFO] [stderr] --> src/main.rs:110:12 [INFO] [stderr] | [INFO] [stderr] 110 | pub struct Snake_Piece(u32, u32); [INFO] [stderr] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `SnakePiece` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stderr] [INFO] [stderr] warning: the item `graphics` is imported redundantly [INFO] [stderr] --> src/main.rs:114:13 [INFO] [stderr] | [INFO] [stderr] 12 | extern crate graphics; [INFO] [stderr] | ---------------------- the item `graphics` is already imported here [INFO] [stderr] ... [INFO] [stderr] 114 | use graphics; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `graphics` is imported redundantly [INFO] [stderr] --> src/main.rs:189:13 [INFO] [stderr] | [INFO] [stderr] 12 | extern crate graphics; [INFO] [stderr] | ---------------------- the item `graphics` is already imported here [INFO] [stderr] ... [INFO] [stderr] 189 | use graphics; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/main.rs:44:40 [INFO] [stderr] | [INFO] [stderr] 44 | self.gl.draw(args.viewport(), |c, gl| { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `args` [INFO] [stderr] --> src/main.rs:52:26 [INFO] [stderr] | [INFO] [stderr] 52 | fn update(&mut self, args: &UpdateArgs) -> bool { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_args` [INFO] [stderr] [INFO] [stderr] warning: variable `WIDTH` should have a snake case name [INFO] [stderr] --> src/main.rs:214:9 [INFO] [stderr] | [INFO] [stderr] 214 | let WIDTH = COLS * SQUARE_WIDTH; [INFO] [stderr] | ^^^^^ help: convert the identifier to snake case: `width` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `HEIGHT` should have a snake case name [INFO] [stderr] --> src/main.rs:215:9 [INFO] [stderr] | [INFO] [stderr] 215 | let HEIGHT = ROWS * SQUARE_WIDTH; [INFO] [stderr] | ^^^^^^ help: convert the identifier to snake case: `height` [INFO] [stderr] [INFO] [stderr] warning: `snake_game` (bin "snake_game" test) generated 8 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.16s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/snake_game-a76fab60cfb5b874) [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" "1802418e652f67d23d1a234676b9df21820181cc737f5a747b2735ae4b0d8023", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1802418e652f67d23d1a234676b9df21820181cc737f5a747b2735ae4b0d8023", kill_on_drop: false }` [INFO] [stdout] 1802418e652f67d23d1a234676b9df21820181cc737f5a747b2735ae4b0d8023