[INFO] cloning repository https://github.com/d2ci8xc5/chip8vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/d2ci8xc5/chip8vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd2ci8xc5%2Fchip8vm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd2ci8xc5%2Fchip8vm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab98e3f549bdef2e6383a2b9d6e77c71642765c1
[INFO] checking d2ci8xc5/chip8vm against master#2e6fc425411280c658d852813de01c5157255088 for pr-128013
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd2ci8xc5%2Fchip8vm" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/d2ci8xc5/chip8vm on toolchain 2e6fc425411280c658d852813de01c5157255088
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/d2ci8xc5/chip8vm
[INFO] finished tweaking git repo https://github.com/d2ci8xc5/chip8vm
[INFO] tweaked toml for git repo https://github.com/d2ci8xc5/chip8vm written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/d2ci8xc5/chip8vm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/AngryLawyer/rust-sdl2`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 427fe918363680bc872f4f88a2cee48f5318b568601fdf3d6890bcb2e5487289
[INFO] running `Command { std: "docker" "start" "-a" "427fe918363680bc872f4f88a2cee48f5318b568601fdf3d6890bcb2e5487289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "427fe918363680bc872f4f88a2cee48f5318b568601fdf3d6890bcb2e5487289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "427fe918363680bc872f4f88a2cee48f5318b568601fdf3d6890bcb2e5487289", kill_on_drop: false }`
[INFO] [stdout] 427fe918363680bc872f4f88a2cee48f5318b568601fdf3d6890bcb2e5487289
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+2e6fc425411280c658d852813de01c5157255088" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 075c65da72a1b957faad818c29e76b9f335870d506ec7c0b0bf344fadd4a57b8
[INFO] running `Command { std: "docker" "start" "-a" "075c65da72a1b957faad818c29e76b9f335870d506ec7c0b0bf344fadd4a57b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling sdl2 v0.32.2 (https://github.com/AngryLawyer/rust-sdl2#72d199e5)
[INFO] [stderr]    Compiling sdl2-sys v0.32.6 (https://github.com/AngryLawyer/rust-sdl2#72d199e5)
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chip8vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `color` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum color {
[INFO] [stdout]   |          ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Color`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `red` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     red,
[INFO] [stdout]   |     ^^^ help: convert the identifier to upper camel case: `Red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `green` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     green,
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Green`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `blue` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     blue,
[INFO] [stdout]   |     ^^^^ help: convert the identifier to upper camel case: `Blue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `black` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     black,
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `color` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum color {
[INFO] [stdout]   |          ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Color`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `cpu` should have an upper camel case name
[INFO] [stdout]  --> src/cpu.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct cpu {
[INFO] [stdout]   |            ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `red` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     red,
[INFO] [stdout]   |     ^^^ help: convert the identifier to upper camel case: `Red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `green` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     green,
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Green`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:282:24
[INFO] [stdout]     |
[INFO] [stdout] 282 |         self.v[0x0f] = (self.v[x] & (1 << 7) >> 7);
[INFO] [stdout]     |                        ^                         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 282 -         self.v[0x0f] = (self.v[x] & (1 << 7) >> 7);
[INFO] [stdout] 282 +         self.v[0x0f] = self.v[x] & (1 << 7) >> 7;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `blue` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     blue,
[INFO] [stdout]   |     ^^^^ help: convert the identifier to upper camel case: `Blue`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `black` should have an upper camel case name
[INFO] [stdout]  --> src/color.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     black,
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `cpu` should have an upper camel case name
[INFO] [stdout]  --> src/cpu.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct cpu {
[INFO] [stdout]   |            ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cpu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:311:21
[INFO] [stdout]     |
[INFO] [stdout] 311 |         self.v[x] = (kk & random_byte);
[INFO] [stdout]     |                     ^                ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 311 -         self.v[x] = (kk & random_byte);
[INFO] [stdout] 311 +         self.v[x] = kk & random_byte;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:282:24
[INFO] [stdout]     |
[INFO] [stdout] 282 |         self.v[0x0f] = (self.v[x] & (1 << 7) >> 7);
[INFO] [stdout]     |                        ^                         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 282 -         self.v[0x0f] = (self.v[x] & (1 << 7) >> 7);
[INFO] [stdout] 282 +         self.v[0x0f] = self.v[x] & (1 << 7) >> 7;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/cpu.rs:319:37
[INFO] [stdout]     |
[INFO] [stdout] 319 |             let pixel = self.memory[(self.i + (y_offset as usize))];
[INFO] [stdout]     |                                     ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -             let pixel = self.memory[(self.i + (y_offset as usize))];
[INFO] [stdout] 319 +             let pixel = self.memory[self.i + (y_offset as usize)];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:372:32
[INFO] [stdout]     |
[INFO] [stdout] 372 |         self.keypad_register = (x as u8);
[INFO] [stdout]     |                                ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 372 -         self.keypad_register = (x as u8);
[INFO] [stdout] 372 +         self.keypad_register = x as u8;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:311:21
[INFO] [stdout]     |
[INFO] [stdout] 311 |         self.v[x] = (kk & random_byte);
[INFO] [stdout]     |                     ^                ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 311 -         self.v[x] = (kk & random_byte);
[INFO] [stdout] 311 +         self.v[x] = kk & random_byte;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cpu::cpu`
[INFO] [stdout]  --> src/display.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::cpu::cpu;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `display` should have an upper camel case name
[INFO] [stdout]  --> src/display.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct display {
[INFO] [stdout]   |            ^^^^^^^ help: convert the identifier to upper camel case: `Display`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/cpu.rs:319:37
[INFO] [stdout]     |
[INFO] [stdout] 319 |             let pixel = self.memory[(self.i + (y_offset as usize))];
[INFO] [stdout]     |                                     ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -             let pixel = self.memory[(self.i + (y_offset as usize))];
[INFO] [stdout] 319 +             let pixel = self.memory[self.i + (y_offset as usize)];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `keypad` should have an upper camel case name
[INFO] [stdout]  --> src/keypad.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct keypad {
[INFO] [stdout]   |            ^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Keypad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cpu::cpu as _cpu`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use cpu::cpu as _cpu;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/cpu.rs:372:32
[INFO] [stdout]     |
[INFO] [stdout] 372 |         self.keypad_register = (x as u8);
[INFO] [stdout]     |                                ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 372 -         self.keypad_register = (x as u8);
[INFO] [stdout] 372 +         self.keypad_register = x as u8;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cpu::cpu`
[INFO] [stdout]  --> src/display.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::cpu::cpu;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `display` should have an upper camel case name
[INFO] [stdout]  --> src/display.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct display {
[INFO] [stdout]   |            ^^^^^^^ help: convert the identifier to upper camel case: `Display`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `keypad` should have an upper camel case name
[INFO] [stdout]  --> src/keypad.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct keypad {
[INFO] [stdout]   |            ^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Keypad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cpu::cpu as _cpu`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use cpu::cpu as _cpu;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/cpu.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |             (0x0f, _, 0x03, 0x03) => self.op_Fx33(x),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `poll_keypad` is assigned to, but never used
[INFO] [stdout]    --> src/cpu.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let poll_keypad;
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_poll_keypad` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `poll_keypad` is never read
[INFO] [stdout]    --> src/cpu.rs:131:26
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 Ok(x) => poll_keypad = x,
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/cpu.rs:262:37
[INFO] [stdout]     |
[INFO] [stdout] 262 |     fn op_8xy6(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/cpu.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |             (0x0f, _, 0x03, 0x03) => self.op_Fx33(x),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/cpu.rs:281:37
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn op_8xyE(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `poll_keypad` is assigned to, but never used
[INFO] [stdout]    --> src/cpu.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let poll_keypad;
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_poll_keypad` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `poll_keypad` is never read
[INFO] [stdout]    --> src/cpu.rs:131:26
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 Ok(x) => poll_keypad = x,
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/cpu.rs:262:37
[INFO] [stdout]     |
[INFO] [stdout] 262 |     fn op_8xy6(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/cpu.rs:281:37
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn op_8xyE(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |                                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x_true`
[INFO] [stdout]   --> src/display.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 let x_true = (x as u32) * SCALE; 
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_x_true`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_true`
[INFO] [stdout]   --> src/display.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 let y_true = (y as u32) * SCALE; 
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_true`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `draw_color` is never read
[INFO] [stdout]   --> src/display.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 let mut draw_color = color::black.value();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/display.rs:50:24
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     Ok(x) => continue,
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `gfx`
[INFO] [stdout]   --> src/display.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn clear(&mut self, gfx: [u8; 32*64]) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_gfx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x_true`
[INFO] [stdout]   --> src/display.rs:34:21
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 let x_true = (x as u32) * SCALE; 
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_x_true`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_true`
[INFO] [stdout]   --> src/display.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 let y_true = (y as u32) * SCALE; 
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_true`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `draw_color` is never read
[INFO] [stdout]   --> src/display.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 let mut draw_color = color::black.value();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/display.rs:50:24
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     Ok(x) => continue,
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `gfx`
[INFO] [stdout]   --> src/display.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn clear(&mut self, gfx: [u8; 32*64]) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_gfx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sdl_context`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let sdl_context = sdl2::init().unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sdl_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `red` and `blue` are never constructed
[INFO] [stdout]  --> src/color.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum color {
[INFO] [stdout]   |          ----- variants in this enum
[INFO] [stdout] 4 |     red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 5 |     green,
[INFO] [stdout] 6 |     blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `display` is never read
[INFO] [stdout]   --> src/cpu.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct cpu {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 25 |     display: display
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/cpu.rs:242:12
[INFO] [stdout]     |
[INFO] [stdout] 242 |         if addition > 0xff {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_8xyE` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn op_8xyE(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_8xy_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Annn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Annn(&mut self, nnn: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_annn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Bnnn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:304:8
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn op_Bnnn(&mut self, nnn: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_bnnn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Cxkk` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:309:8
[INFO] [stdout]     |
[INFO] [stdout] 309 |     fn op_Cxkk(&mut self, x: usize, kk: u8) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_cxkk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Dxyn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 316 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: u16) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_dxyn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Ex9E` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:342:8
[INFO] [stdout]     |
[INFO] [stdout] 342 |     fn op_Ex9E(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_ex9_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_ExA1` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     fn op_ExA1(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_ex_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx07` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx07(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx07`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx0A` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:369:8
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn op_Fx0A(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_fx0_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx15` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn op_Fx15(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx15`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx18` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:383:8
[INFO] [stdout]     |
[INFO] [stdout] 383 |     fn op_Fx18(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx18`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx1E` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:389:8
[INFO] [stdout]     |
[INFO] [stdout] 389 |     fn op_Fx1E(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_fx1_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx29` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:395:8
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn op_Fx29(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx29`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx33` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:401:8
[INFO] [stdout]     |
[INFO] [stdout] 401 |     fn op_Fx33(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx33`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx55` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:408:8
[INFO] [stdout]     |
[INFO] [stdout] 408 |     fn op_Fx55(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx55`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx65` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:415:8
[INFO] [stdout]     |
[INFO] [stdout] 415 |     fn op_Fx65(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx65`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `font` should have an upper case name
[INFO] [stdout]  --> src/font.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const font: [u8; 80] = [
[INFO] [stdout]   |           ^^^^ help: convert the identifier to upper case: `FONT`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sdl_context`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let sdl_context = sdl2::init().unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sdl_context`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `red` and `blue` are never constructed
[INFO] [stdout]  --> src/color.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum color {
[INFO] [stdout]   |          ----- variants in this enum
[INFO] [stdout] 4 |     red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 5 |     green,
[INFO] [stdout] 6 |     blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `opcode` and `display` are never read
[INFO] [stdout]   --> src/cpu.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct cpu {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] 9  |     opcode: u16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     display: display
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/cpu.rs:242:12
[INFO] [stdout]     |
[INFO] [stdout] 242 |         if addition > 0xff {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_8xyE` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn op_8xyE(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_8xy_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Annn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Annn(&mut self, nnn: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_annn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Bnnn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:304:8
[INFO] [stdout]     |
[INFO] [stdout] 304 |     fn op_Bnnn(&mut self, nnn: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_bnnn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Cxkk` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:309:8
[INFO] [stdout]     |
[INFO] [stdout] 309 |     fn op_Cxkk(&mut self, x: usize, kk: u8) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_cxkk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Dxyn` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:316:8
[INFO] [stdout]     |
[INFO] [stdout] 316 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: u16) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_dxyn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Ex9E` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:342:8
[INFO] [stdout]     |
[INFO] [stdout] 342 |     fn op_Ex9E(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_ex9_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_ExA1` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     fn op_ExA1(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_ex_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx07` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx07(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx07`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx0A` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:369:8
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn op_Fx0A(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_fx0_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx15` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn op_Fx15(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx15`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx18` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:383:8
[INFO] [stdout]     |
[INFO] [stdout] 383 |     fn op_Fx18(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx18`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx1E` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:389:8
[INFO] [stdout]     |
[INFO] [stdout] 389 |     fn op_Fx1E(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_fx1_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx29` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:395:8
[INFO] [stdout]     |
[INFO] [stdout] 395 |     fn op_Fx29(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx29`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx33` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:401:8
[INFO] [stdout]     |
[INFO] [stdout] 401 |     fn op_Fx33(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx33`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx55` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:408:8
[INFO] [stdout]     |
[INFO] [stdout] 408 |     fn op_Fx55(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx55`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Fx65` should have a snake case name
[INFO] [stdout]    --> src/cpu.rs:415:8
[INFO] [stdout]     |
[INFO] [stdout] 415 |     fn op_Fx65(&mut self, x: usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx65`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `font` should have an upper case name
[INFO] [stdout]  --> src/font.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const font: [u8; 80] = [
[INFO] [stdout]   |           ^^^^ help: convert the identifier to upper case: `FONT`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "075c65da72a1b957faad818c29e76b9f335870d506ec7c0b0bf344fadd4a57b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "075c65da72a1b957faad818c29e76b9f335870d506ec7c0b0bf344fadd4a57b8", kill_on_drop: false }`
[INFO] [stdout] 075c65da72a1b957faad818c29e76b9f335870d506ec7c0b0bf344fadd4a57b8