[INFO] cloning repository https://github.com/sszabo11/chip8-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sszabo11/chip8-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsszabo11%2Fchip8-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsszabo11%2Fchip8-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ad167c55c66f44b915952418173525219181cb4d
[INFO] checking sszabo11/chip8-rs against master#e1613686e0efc80a1a18b1263625450a8de3fb04 for pr-154492-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsszabo11%2Fchip8-rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sszabo11/chip8-rs
[INFO] finished tweaking git repo https://github.com/sszabo11/chip8-rs
[INFO] tweaked toml for git repo https://github.com/sszabo11/chip8-rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sszabo11/chip8-rs on toolchain e1613686e0efc80a1a18b1263625450a8de3fb04
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sszabo11/chip8-rs 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" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded version-compare v0.1.1
[INFO] [stderr]   Downloaded cmake v0.1.54
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.30
[INFO] [stderr]   Downloaded cc v1.2.46
[INFO] [stderr]   Downloaded zerocopy v0.8.30
[INFO] [stderr]   Downloaded sdl2 v0.38.0
[INFO] [stderr]   Downloaded libc v0.2.177
[INFO] [stderr]   Downloaded sdl2-sys v0.38.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 000e38377c0e423b6ca01c1e15125584346e04cd2d8fb8eff79e75956f7d8ac0
[INFO] running `Command { std: "docker" "start" "-a" "000e38377c0e423b6ca01c1e15125584346e04cd2d8fb8eff79e75956f7d8ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "000e38377c0e423b6ca01c1e15125584346e04cd2d8fb8eff79e75956f7d8ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "000e38377c0e423b6ca01c1e15125584346e04cd2d8fb8eff79e75956f7d8ac0", kill_on_drop: false }`
[INFO] [stdout] 000e38377c0e423b6ca01c1e15125584346e04cd2d8fb8eff79e75956f7d8ac0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1137190c236410b8788e7b3989e830f9731d6533b9be6b36f388b8e737b1b487
[INFO] running `Command { std: "docker" "start" "-a" "1137190c236410b8788e7b3989e830f9731d6533b9be6b36f388b8e737b1b487", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling find-msvc-tools v0.1.5
[INFO] [stderr]    Compiling zerocopy v0.8.30
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling sdl2 v0.38.0
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking log v0.4.28
[INFO] [stderr]    Compiling cc v1.2.46
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]    Compiling sdl2-sys v0.38.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking chip8-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `info`, `trace`, and `warn`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log::{info, trace, warn};
[INFO] [stdout]   |           ^^^^  ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::stdout`
[INFO] [stdout]  --> src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{env, fs, io::stdout};
[INFO] [stdout]   |                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `info`, `trace`, and `warn`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log::{info, trace, warn};
[INFO] [stdout]   |           ^^^^  ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::stdout`
[INFO] [stdout]  --> src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{env, fs, io::stdout};
[INFO] [stdout]   |                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         for i in self.memory {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:245:21
[INFO] [stdout]     |
[INFO] [stdout] 245 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:246:21
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:259:21
[INFO] [stdout]     |
[INFO] [stdout] 259 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:260:21
[INFO] [stdout]     |
[INFO] [stdout] 260 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:276:21
[INFO] [stdout]     |
[INFO] [stdout] 276 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:277:21
[INFO] [stdout]     |
[INFO] [stdout] 277 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:283:20
[INFO] [stdout]     |
[INFO] [stdout] 283 |             (8, x, y, 0xE) => {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:293:21
[INFO] [stdout]     |
[INFO] [stdout] 293 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:294:21
[INFO] [stdout]     |
[INFO] [stdout] 294 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n1`
[INFO] [stdout]    --> src/main.rs:322:19
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                   ^^ help: if this is intentional, prefix it with an underscore: `_n1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n2`
[INFO] [stdout]    --> src/main.rs:322:23
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                       ^^ help: if this is intentional, prefix it with an underscore: `_n2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n3`
[INFO] [stdout]    --> src/main.rs:322:27
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                           ^^ help: if this is intentional, prefix it with an underscore: `_n3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 |         let mut last_cycle_time = std::time::Instant::now();
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_cycle_time`
[INFO] [stdout]    --> src/main.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 |         let mut last_cycle_time = std::time::Instant::now();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_cycle_time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> src/main.rs:595:17
[INFO] [stdout]     |
[INFO] [stdout] 595 |             let now = std::time::Instant::now();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exec`
[INFO] [stdout]    --> src/main.rs:601:21
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 let exec = self.execute_instruction(op);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_exec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `opcode` is never read
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Chip8 {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 71 |     opcode: u16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `reset` is never used
[INFO] [stdout]    --> src/main.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout]  74 | impl Chip8 {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn reset(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         for i in self.memory {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:245:21
[INFO] [stdout]     |
[INFO] [stdout] 245 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:246:21
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:259:21
[INFO] [stdout]     |
[INFO] [stdout] 259 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:260:21
[INFO] [stdout]     |
[INFO] [stdout] 260 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:276:21
[INFO] [stdout]     |
[INFO] [stdout] 276 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:277:21
[INFO] [stdout]     |
[INFO] [stdout] 277 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:283:20
[INFO] [stdout]     |
[INFO] [stdout] 283 |             (8, x, y, 0xE) => {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vy`
[INFO] [stdout]    --> src/main.rs:293:21
[INFO] [stdout]     |
[INFO] [stdout] 293 |                 let vy = self.v_reg[y as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vx`
[INFO] [stdout]    --> src/main.rs:294:21
[INFO] [stdout]     |
[INFO] [stdout] 294 |                 let vx = self.v_reg[x as usize];
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n1`
[INFO] [stdout]    --> src/main.rs:322:19
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                   ^^ help: if this is intentional, prefix it with an underscore: `_n1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n2`
[INFO] [stdout]    --> src/main.rs:322:23
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                       ^^ help: if this is intentional, prefix it with an underscore: `_n2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n3`
[INFO] [stdout]    --> src/main.rs:322:27
[INFO] [stdout]     |
[INFO] [stdout] 322 |             (0xB, n1, n2, n3) => {
[INFO] [stdout]     |                           ^^ help: if this is intentional, prefix it with an underscore: `_n3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 |         let mut last_cycle_time = std::time::Instant::now();
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_cycle_time`
[INFO] [stdout]    --> src/main.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 |         let mut last_cycle_time = std::time::Instant::now();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_cycle_time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> src/main.rs:595:17
[INFO] [stdout]     |
[INFO] [stdout] 595 |             let now = std::time::Instant::now();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exec`
[INFO] [stdout]    --> src/main.rs:601:21
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 let exec = self.execute_instruction(op);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_exec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `opcode` is never read
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct Chip8 {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 71 |     opcode: u16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `reset` is never used
[INFO] [stdout]    --> src/main.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout]  74 | impl Chip8 {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn reset(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 44s
[INFO] running `Command { std: "docker" "inspect" "1137190c236410b8788e7b3989e830f9731d6533b9be6b36f388b8e737b1b487", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1137190c236410b8788e7b3989e830f9731d6533b9be6b36f388b8e737b1b487", kill_on_drop: false }`
[INFO] [stdout] 1137190c236410b8788e7b3989e830f9731d6533b9be6b36f388b8e737b1b487
