[INFO] cloning repository https://github.com/whothey/rsnake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/whothey/rsnake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhothey%2Frsnake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhothey%2Frsnake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 373f9ef184e1a5838874d9bd05e9b2e9fa686b5d
[INFO] testing whothey/rsnake 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%2Fwhothey%2Frsnake" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/whothey/rsnake 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/whothey/rsnake
[INFO] finished tweaking git repo https://github.com/whothey/rsnake
[INFO] tweaked toml for git repo https://github.com/whothey/rsnake written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/whothey/rsnake 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] 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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d20ee5c7ddb94585da07c65795202b403d30a8a01b65bfefae574bbd0124fb7c
[INFO] running `Command { std: "docker" "start" "-a" "d20ee5c7ddb94585da07c65795202b403d30a8a01b65bfefae574bbd0124fb7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d20ee5c7ddb94585da07c65795202b403d30a8a01b65bfefae574bbd0124fb7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d20ee5c7ddb94585da07c65795202b403d30a8a01b65bfefae574bbd0124fb7c", kill_on_drop: false }`
[INFO] [stdout] d20ee5c7ddb94585da07c65795202b403d30a8a01b65bfefae574bbd0124fb7c
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99b239a9b47e9bd5162d805fb46e3e025d43732c4476161d171403a0deb90f16
[INFO] running `Command { std: "docker" "start" "-a" "99b239a9b47e9bd5162d805fb46e3e025d43732c4476161d171403a0deb90f16", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling sdl2-sys v0.30.0
[INFO] [stderr]    Compiling libc v0.2.23
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling num-integer v0.1.34
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling sdl2 v0.30.0
[INFO] [stderr]    Compiling rsnake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `WHITE`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_WHITE`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `timer`
[INFO] [stdout]   --> src/main.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_timer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framerate`
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut framerate = 0u16;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framerate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut framerate = 0u16;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `BLACK` should have a snake case name
[INFO] [stdout]   --> src/main.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let BLACK: Color = Color::RGB(0, 0, 0);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `black`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `WHITE` should have a snake case name
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `white`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `RED` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let RED:   Color = Color::RGB(0xff, 0x00, 0x00);
[INFO] [stdout]    |         ^^^ help: convert the identifier to snake case: `red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `GREEN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let GREEN: Color = Color::RGB(0x00, 0xff, 0x00);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `green`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/snake.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         canvas.fill_rect(self.head);
[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 `Result` that must be used
[INFO] [stdout]   --> src/snake.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             canvas.fill_rect(r);
[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: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.74s
[INFO] running `Command { std: "docker" "inspect" "99b239a9b47e9bd5162d805fb46e3e025d43732c4476161d171403a0deb90f16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99b239a9b47e9bd5162d805fb46e3e025d43732c4476161d171403a0deb90f16", kill_on_drop: false }`
[INFO] [stdout] 99b239a9b47e9bd5162d805fb46e3e025d43732c4476161d171403a0deb90f16
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9828257bfa913d9b19e74f41a62ab4d0b7fbb3e0cea6d1313b66de58a139aef4
[INFO] running `Command { std: "docker" "start" "-a" "9828257bfa913d9b19e74f41a62ab4d0b7fbb3e0cea6d1313b66de58a139aef4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rsnake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `WHITE`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_WHITE`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `timer`
[INFO] [stdout]   --> src/main.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_timer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framerate`
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut framerate = 0u16;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framerate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut framerate = 0u16;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `BLACK` should have a snake case name
[INFO] [stdout]   --> src/main.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let BLACK: Color = Color::RGB(0, 0, 0);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `black`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `WHITE` should have a snake case name
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `white`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `RED` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let RED:   Color = Color::RGB(0xff, 0x00, 0x00);
[INFO] [stdout]    |         ^^^ help: convert the identifier to snake case: `red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `GREEN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let GREEN: Color = Color::RGB(0x00, 0xff, 0x00);
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `green`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/snake.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         canvas.fill_rect(self.head);
[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 `Result` that must be used
[INFO] [stdout]   --> src/snake.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             canvas.fill_rect(r);
[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: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "9828257bfa913d9b19e74f41a62ab4d0b7fbb3e0cea6d1313b66de58a139aef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9828257bfa913d9b19e74f41a62ab4d0b7fbb3e0cea6d1313b66de58a139aef4", kill_on_drop: false }`
[INFO] [stdout] 9828257bfa913d9b19e74f41a62ab4d0b7fbb3e0cea6d1313b66de58a139aef4
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7859982e1c3b292b88d0d889dc37565a165f656513c0416e8b6f86cb1fe42921
[INFO] running `Command { std: "docker" "start" "-a" "7859982e1c3b292b88d0d889dc37565a165f656513c0416e8b6f86cb1fe42921", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `WHITE`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stdout] 
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_WHITE`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `timer`
[INFO] [stderr]   --> src/main.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_timer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `framerate`
[INFO] [stderr]   --> src/main.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut framerate = 0u16;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framerate`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut timer  = ctx.timer().expect("Could not create a timer!");
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut framerate = 0u16;
[INFO] [stderr]    |         ----^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `BLACK` should have a snake case name
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let BLACK: Color = Color::RGB(0, 0, 0);
[INFO] [stderr]    |         ^^^^^ help: convert the identifier to snake case: `black`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `WHITE` should have a snake case name
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let WHITE: Color = Color::RGB(0xff, 0xff, 0xff);
[INFO] [stderr]    |         ^^^^^ help: convert the identifier to snake case: `white`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `RED` should have a snake case name
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let RED:   Color = Color::RGB(0xff, 0x00, 0x00);
[INFO] [stderr]    |         ^^^ help: convert the identifier to snake case: `red`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `GREEN` should have a snake case name
[INFO] [stderr]   --> src/main.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let GREEN: Color = Color::RGB(0x00, 0xff, 0x00);
[INFO] [stderr]    |         ^^^^^ help: convert the identifier to snake case: `green`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/snake.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         canvas.fill_rect(self.head);
[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 `Result` that must be used
[INFO] [stderr]   --> src/snake.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |             canvas.fill_rect(r);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `rsnake` (bin "rsnake" test) generated 11 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rsnake-7dd205380d299c53)
[INFO] running `Command { std: "docker" "inspect" "7859982e1c3b292b88d0d889dc37565a165f656513c0416e8b6f86cb1fe42921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7859982e1c3b292b88d0d889dc37565a165f656513c0416e8b6f86cb1fe42921", kill_on_drop: false }`
[INFO] [stdout] 7859982e1c3b292b88d0d889dc37565a165f656513c0416e8b6f86cb1fe42921