[INFO] cloning repository https://github.com/christopherjmedlin/yalc8emu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christopherjmedlin/yalc8emu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristopherjmedlin%2Fyalc8emu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristopherjmedlin%2Fyalc8emu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa140db9922c8fff32635f89eb72ce5c7183ab59
[INFO] building christopherjmedlin/yalc8emu against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristopherjmedlin%2Fyalc8emu" "/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/christopherjmedlin/yalc8emu on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/christopherjmedlin/yalc8emu
[INFO] finished tweaking git repo https://github.com/christopherjmedlin/yalc8emu
[INFO] tweaked toml for git repo https://github.com/christopherjmedlin/yalc8emu written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/christopherjmedlin/yalc8emu 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7275524e586d7305e84ba119559559db04138080eba31bd96d8eef82bca7e7c1
[INFO] running `Command { std: "docker" "start" "-a" "7275524e586d7305e84ba119559559db04138080eba31bd96d8eef82bca7e7c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7275524e586d7305e84ba119559559db04138080eba31bd96d8eef82bca7e7c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7275524e586d7305e84ba119559559db04138080eba31bd96d8eef82bca7e7c1", kill_on_drop: false }`
[INFO] [stdout] 7275524e586d7305e84ba119559559db04138080eba31bd96d8eef82bca7e7c1
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0984264604b68efa58aac203a52bed8ddaf2bbf8f354365d282f6ed893c24a60
[INFO] running `Command { std: "docker" "start" "-a" "0984264604b68efa58aac203a52bed8ddaf2bbf8f354365d282f6ed893c24a60", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/cpu/timers.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::{Instant, Duration};
[INFO] [stdout]   |                          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/cpu/timers.rs:42:37
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn elapsed_millis(&mut self) -> (u64) {
[INFO] [stdout]    |                                     ^   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 42 -     fn elapsed_millis(&mut self) -> (u64) {
[INFO] [stdout] 42 +     fn elapsed_millis(&mut self) -> u64 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::Wrapping`
[INFO] [stdout]  --> src/cpu/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::num::Wrapping;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout]     |                              ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout] 127 +     fn op_00E0(&mut self) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:133:30
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout]     |                              ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 133 -     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout] 133 +     fn op_00EE(&mut self) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:140:42
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn op_1nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 140 -     fn op_1nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 140 +     fn op_1nnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:146:42
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn op_2nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 146 -     fn op_2nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 146 +     fn op_2nnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:155:48
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn op_3xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 155 -     fn op_3xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 155 +     fn op_3xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:163:48
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn op_4xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -     fn op_4xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 163 +     fn op_4xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:171:50
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn op_5xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 171 -     fn op_5xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 171 +     fn op_5xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:179:48
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn op_6xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 179 -     fn op_6xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 179 +     fn op_6xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:185:48
[INFO] [stdout]     |
[INFO] [stdout] 185 |     fn op_7xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -     fn op_7xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 185 +     fn op_7xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:192:50
[INFO] [stdout]     |
[INFO] [stdout] 192 |     fn op_8xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 192 -     fn op_8xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 192 +     fn op_8xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:198:50
[INFO] [stdout]     |
[INFO] [stdout] 198 |     fn op_8xy1(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 198 -     fn op_8xy1(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 198 +     fn op_8xy1(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:204:50
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn op_8xy2(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 204 -     fn op_8xy2(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 204 +     fn op_8xy2(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:210:50
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn op_8xy3(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 210 -     fn op_8xy3(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 210 +     fn op_8xy3(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:216:50
[INFO] [stdout]     |
[INFO] [stdout] 216 |     fn op_8xy4(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 216 -     fn op_8xy4(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 216 +     fn op_8xy4(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:230:50
[INFO] [stdout]     |
[INFO] [stdout] 230 |     fn op_8xy5(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 230 -     fn op_8xy5(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 230 +     fn op_8xy5(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:245:40
[INFO] [stdout]     |
[INFO] [stdout] 245 |     fn op_8xy6(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 245 -     fn op_8xy6(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 245 +     fn op_8xy6(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:253:50
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn op_8xy7(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 253 -     fn op_8xy7(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 253 +     fn op_8xy7(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:264:40
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 264 -     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 264 +     fn op_8xyE(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:271:50
[INFO] [stdout]     |
[INFO] [stdout] 271 |     fn op_9xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 271 -     fn op_9xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 271 +     fn op_9xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:279:42
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn op_Annn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 279 -     fn op_Annn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 279 +     fn op_Annn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:285:42
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn op_Bnnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -     fn op_Bnnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 285 +     fn op_Bnnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:291:48
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 291 -     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 291 +     fn op_Cxkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:298:60
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[INFO] [stdout]     |                                                            ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 298 -     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[INFO] [stdout] 298 +     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:312:41
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn op_Ex9E (&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                         ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 312 -     fn op_Ex9E (&mut self, x: usize) -> (usize) {
[INFO] [stdout] 312 +     fn op_Ex9E (&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:318:40
[INFO] [stdout]     |
[INFO] [stdout] 318 |     fn op_ExA1(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 318 -     fn op_ExA1(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 318 +     fn op_ExA1(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:324:40
[INFO] [stdout]     |
[INFO] [stdout] 324 |     fn op_Fx07(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 324 -     fn op_Fx07(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 324 +     fn op_Fx07(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:330:40
[INFO] [stdout]     |
[INFO] [stdout] 330 |     fn op_Fx0A(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 330 -     fn op_Fx0A(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 330 +     fn op_Fx0A(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:344:40
[INFO] [stdout]     |
[INFO] [stdout] 344 |     fn op_Fx15(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 344 -     fn op_Fx15(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 344 +     fn op_Fx15(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:350:40
[INFO] [stdout]     |
[INFO] [stdout] 350 |     fn op_Fx18(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 350 -     fn op_Fx18(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 350 +     fn op_Fx18(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:356:40
[INFO] [stdout]     |
[INFO] [stdout] 356 |     fn op_Fx1E(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 356 -     fn op_Fx1E(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 356 +     fn op_Fx1E(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:362:40
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx29(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 362 -     fn op_Fx29(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 362 +     fn op_Fx29(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:368:40
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn op_Fx33(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 368 -     fn op_Fx33(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 368 +     fn op_Fx33(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:376:40
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn op_Fx55(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 376 -     fn op_Fx55(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 376 +     fn op_Fx55(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/cpu/mod.rs:378:22
[INFO] [stdout]     |
[INFO] [stdout] 378 |         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout]     |                      ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 378 -         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout] 378 +         let end = if x > 0xf {0xf} else {x};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:387:40
[INFO] [stdout]     |
[INFO] [stdout] 387 |     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 387 -     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 387 +     fn op_Fx65(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/cpu/mod.rs:389:22
[INFO] [stdout]     |
[INFO] [stdout] 389 |         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout]     |                      ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 389 -         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout] 389 +         let end = if x > 0xf {0xf} else {x};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:397:49
[INFO] [stdout]     |
[INFO] [stdout] 397 |     fn unimplemented(&mut self, opcode: u16) -> (usize) {
[INFO] [stdout]     |                                                 ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 397 -     fn unimplemented(&mut self, opcode: u16) -> (usize) {
[INFO] [stdout] 397 +     fn unimplemented(&mut self, opcode: u16) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/display.rs:22:76
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> (bool) {
[INFO] [stdout]    |                                                                            ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> (bool) {
[INFO] [stdout] 22 +     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> bool {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/display.rs:68:51
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get_pixel(self, x: usize, y: usize) -> (bool) {
[INFO] [stdout]    |                                                   ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 68 -     pub fn get_pixel(self, x: usize, y: usize) -> (bool) {
[INFO] [stdout] 68 +     pub fn get_pixel(self, x: usize, y: usize) -> bool {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cpu/timers.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let mut timers = TimerSubsystem {
[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: unused variable: `b`
[INFO] [stdout]   --> src/cpu/mod.rs:50:18
[INFO] [stdout]    |
[INFO] [stdout] 50 |         for (i, &b) in rom.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `why`
[INFO] [stdout]  --> src/rom.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(why) => panic!("Couldn't open ROM"),
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_why`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/display.rs:57:25
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     let result = canvas.fill_rect(Rect::new(x_coord, y_coord, 10, 10));
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event_keycode`
[INFO] [stdout]   --> src/keypad.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let event_keycode: Keycode;
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_event_keycode`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_pixel` is never used
[INFO] [stdout]   --> src/display.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Display {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn get_pixel(self, x: usize, y: usize) -> (bool) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_00E0` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_00_e0`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_00EE` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_00_ee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_8xyE` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:264:8
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_8xy_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Annn` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:279:8
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn op_Annn(&mut self, nnn: usize) -> (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/mod.rs:285:8
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn op_Bnnn(&mut self, nnn: usize) -> (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/mod.rs:291:8
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[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/mod.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[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/mod.rs:312:8
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn op_Ex9E (&mut self, x: usize) -> (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/mod.rs:318:8
[INFO] [stdout]     |
[INFO] [stdout] 318 |     fn op_ExA1(&mut self, x: usize) -> (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/mod.rs:324:8
[INFO] [stdout]     |
[INFO] [stdout] 324 |     fn op_Fx07(&mut self, x: usize) -> (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/mod.rs:330:8
[INFO] [stdout]     |
[INFO] [stdout] 330 |     fn op_Fx0A(&mut self, x: usize) -> (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/mod.rs:344:8
[INFO] [stdout]     |
[INFO] [stdout] 344 |     fn op_Fx15(&mut self, x: usize) -> (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/mod.rs:350:8
[INFO] [stdout]     |
[INFO] [stdout] 350 |     fn op_Fx18(&mut self, x: usize) -> (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/mod.rs:356:8
[INFO] [stdout]     |
[INFO] [stdout] 356 |     fn op_Fx1E(&mut self, x: usize) -> (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/mod.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx29(&mut self, x: usize) -> (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/mod.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn op_Fx33(&mut self, x: usize) -> (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/mod.rs:376:8
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn op_Fx55(&mut self, x: usize) -> (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/mod.rs:387:8
[INFO] [stdout]     |
[INFO] [stdout] 387 |     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx65`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/rom.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     file.read(buf);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = file.read(buf);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.49s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.7.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "0984264604b68efa58aac203a52bed8ddaf2bbf8f354365d282f6ed893c24a60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0984264604b68efa58aac203a52bed8ddaf2bbf8f354365d282f6ed893c24a60", kill_on_drop: false }`
[INFO] [stdout] 0984264604b68efa58aac203a52bed8ddaf2bbf8f354365d282f6ed893c24a60
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eb31d96f8a9396d32dfe58f72a91eed768d31ae0ef0c14af0bfae3d4de2b2cf
[INFO] running `Command { std: "docker" "start" "-a" "8eb31d96f8a9396d32dfe58f72a91eed768d31ae0ef0c14af0bfae3d4de2b2cf", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/cpu/timers.rs:42:37
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn elapsed_millis(&mut self) -> (u64) {
[INFO] [stdout]    |                                     ^   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 42 -     fn elapsed_millis(&mut self) -> (u64) {
[INFO] [stdout] 42 +     fn elapsed_millis(&mut self) -> u64 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::Wrapping`
[INFO] [stdout]  --> src/cpu/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::num::Wrapping;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout]     |                              ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout] 127 +     fn op_00E0(&mut self) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:133:30
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout]     |                              ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 133 -     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout] 133 +     fn op_00EE(&mut self) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:140:42
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn op_1nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 140 -     fn op_1nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 140 +     fn op_1nnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:146:42
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn op_2nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 146 -     fn op_2nnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 146 +     fn op_2nnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:155:48
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn op_3xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 155 -     fn op_3xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 155 +     fn op_3xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:163:48
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn op_4xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -     fn op_4xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 163 +     fn op_4xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:171:50
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn op_5xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 171 -     fn op_5xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 171 +     fn op_5xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:179:48
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn op_6xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 179 -     fn op_6xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 179 +     fn op_6xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:185:48
[INFO] [stdout]     |
[INFO] [stdout] 185 |     fn op_7xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -     fn op_7xkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 185 +     fn op_7xkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:192:50
[INFO] [stdout]     |
[INFO] [stdout] 192 |     fn op_8xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 192 -     fn op_8xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 192 +     fn op_8xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:198:50
[INFO] [stdout]     |
[INFO] [stdout] 198 |     fn op_8xy1(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 198 -     fn op_8xy1(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 198 +     fn op_8xy1(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:204:50
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn op_8xy2(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 204 -     fn op_8xy2(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 204 +     fn op_8xy2(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:210:50
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn op_8xy3(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 210 -     fn op_8xy3(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 210 +     fn op_8xy3(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:216:50
[INFO] [stdout]     |
[INFO] [stdout] 216 |     fn op_8xy4(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 216 -     fn op_8xy4(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 216 +     fn op_8xy4(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:230:50
[INFO] [stdout]     |
[INFO] [stdout] 230 |     fn op_8xy5(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 230 -     fn op_8xy5(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 230 +     fn op_8xy5(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:245:40
[INFO] [stdout]     |
[INFO] [stdout] 245 |     fn op_8xy6(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 245 -     fn op_8xy6(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 245 +     fn op_8xy6(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:253:50
[INFO] [stdout]     |
[INFO] [stdout] 253 |     fn op_8xy7(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 253 -     fn op_8xy7(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 253 +     fn op_8xy7(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:264:40
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 264 -     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 264 +     fn op_8xyE(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:271:50
[INFO] [stdout]     |
[INFO] [stdout] 271 |     fn op_9xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout]     |                                                  ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 271 -     fn op_9xy0(&mut self, x: usize, y: usize) -> (usize) {
[INFO] [stdout] 271 +     fn op_9xy0(&mut self, x: usize, y: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:279:42
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn op_Annn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 279 -     fn op_Annn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 279 +     fn op_Annn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:285:42
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn op_Bnnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout]     |                                          ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 -     fn op_Bnnn(&mut self, nnn: usize) -> (usize) {
[INFO] [stdout] 285 +     fn op_Bnnn(&mut self, nnn: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:291:48
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout]     |                                                ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 291 -     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[INFO] [stdout] 291 +     fn op_Cxkk(&mut self, x: usize, kk: u8) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:298:60
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[INFO] [stdout]     |                                                            ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 298 -     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[INFO] [stdout] 298 +     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:312:41
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn op_Ex9E (&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                         ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 312 -     fn op_Ex9E (&mut self, x: usize) -> (usize) {
[INFO] [stdout] 312 +     fn op_Ex9E (&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:318:40
[INFO] [stdout]     |
[INFO] [stdout] 318 |     fn op_ExA1(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 318 -     fn op_ExA1(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 318 +     fn op_ExA1(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:324:40
[INFO] [stdout]     |
[INFO] [stdout] 324 |     fn op_Fx07(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 324 -     fn op_Fx07(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 324 +     fn op_Fx07(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:330:40
[INFO] [stdout]     |
[INFO] [stdout] 330 |     fn op_Fx0A(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 330 -     fn op_Fx0A(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 330 +     fn op_Fx0A(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:344:40
[INFO] [stdout]     |
[INFO] [stdout] 344 |     fn op_Fx15(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 344 -     fn op_Fx15(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 344 +     fn op_Fx15(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:350:40
[INFO] [stdout]     |
[INFO] [stdout] 350 |     fn op_Fx18(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 350 -     fn op_Fx18(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 350 +     fn op_Fx18(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:356:40
[INFO] [stdout]     |
[INFO] [stdout] 356 |     fn op_Fx1E(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 356 -     fn op_Fx1E(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 356 +     fn op_Fx1E(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:362:40
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx29(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 362 -     fn op_Fx29(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 362 +     fn op_Fx29(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:368:40
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn op_Fx33(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 368 -     fn op_Fx33(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 368 +     fn op_Fx33(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:376:40
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn op_Fx55(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 376 -     fn op_Fx55(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 376 +     fn op_Fx55(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/cpu/mod.rs:378:22
[INFO] [stdout]     |
[INFO] [stdout] 378 |         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout]     |                      ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 378 -         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout] 378 +         let end = if x > 0xf {0xf} else {x};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:387:40
[INFO] [stdout]     |
[INFO] [stdout] 387 |     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |                                        ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 387 -     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout] 387 +     fn op_Fx65(&mut self, x: usize) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/cpu/mod.rs:389:22
[INFO] [stdout]     |
[INFO] [stdout] 389 |         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout]     |                      ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 389 -         let end = if (x > 0xf) {0xf} else {x};
[INFO] [stdout] 389 +         let end = if x > 0xf {0xf} else {x};
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cpu/mod.rs:397:49
[INFO] [stdout]     |
[INFO] [stdout] 397 |     fn unimplemented(&mut self, opcode: u16) -> (usize) {
[INFO] [stdout]     |                                                 ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 397 -     fn unimplemented(&mut self, opcode: u16) -> (usize) {
[INFO] [stdout] 397 +     fn unimplemented(&mut self, opcode: u16) -> usize {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/display.rs:22:76
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> (bool) {
[INFO] [stdout]    |                                                                            ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 22 -     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> (bool) {
[INFO] [stdout] 22 +     pub fn draw(&mut self, x: usize, y: usize, n: usize, sprite: &[u8]) -> bool {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/display.rs:68:51
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get_pixel(self, x: usize, y: usize) -> (bool) {
[INFO] [stdout]    |                                                   ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 68 -     pub fn get_pixel(self, x: usize, y: usize) -> (bool) {
[INFO] [stdout] 68 +     pub fn get_pixel(self, x: usize, y: usize) -> bool {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cpu/timers.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let mut timers = TimerSubsystem {
[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: unused variable: `b`
[INFO] [stdout]   --> src/cpu/mod.rs:50:18
[INFO] [stdout]    |
[INFO] [stdout] 50 |         for (i, &b) in rom.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `why`
[INFO] [stdout]  --> src/rom.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Err(why) => panic!("Couldn't open ROM"),
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_why`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/display.rs:57:25
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     let result = canvas.fill_rect(Rect::new(x_coord, y_coord, 10, 10));
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pixels_cleared`
[INFO] [stdout]   --> src/display.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let pixels_cleared = display.draw(63, 31, 5, &sprite);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pixels_cleared`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event_keycode`
[INFO] [stdout]   --> src/keypad.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let event_keycode: Keycode;
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_event_keycode`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_00E0` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn op_00E0(&mut self) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_00_e0`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_00EE` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn op_00EE(&mut self) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_00_ee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_8xyE` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:264:8
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn op_8xyE(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case: `op_8xy_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `op_Annn` should have a snake case name
[INFO] [stdout]    --> src/cpu/mod.rs:279:8
[INFO] [stdout]     |
[INFO] [stdout] 279 |     fn op_Annn(&mut self, nnn: usize) -> (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/mod.rs:285:8
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn op_Bnnn(&mut self, nnn: usize) -> (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/mod.rs:291:8
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn op_Cxkk(&mut self, x: usize, kk: u8) -> (usize) {
[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/mod.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 |     fn op_Dxyn(&mut self, x: usize, y: usize, n: usize) -> (usize) {
[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/mod.rs:312:8
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn op_Ex9E (&mut self, x: usize) -> (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/mod.rs:318:8
[INFO] [stdout]     |
[INFO] [stdout] 318 |     fn op_ExA1(&mut self, x: usize) -> (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/mod.rs:324:8
[INFO] [stdout]     |
[INFO] [stdout] 324 |     fn op_Fx07(&mut self, x: usize) -> (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/mod.rs:330:8
[INFO] [stdout]     |
[INFO] [stdout] 330 |     fn op_Fx0A(&mut self, x: usize) -> (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/mod.rs:344:8
[INFO] [stdout]     |
[INFO] [stdout] 344 |     fn op_Fx15(&mut self, x: usize) -> (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/mod.rs:350:8
[INFO] [stdout]     |
[INFO] [stdout] 350 |     fn op_Fx18(&mut self, x: usize) -> (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/mod.rs:356:8
[INFO] [stdout]     |
[INFO] [stdout] 356 |     fn op_Fx1E(&mut self, x: usize) -> (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/mod.rs:362:8
[INFO] [stdout]     |
[INFO] [stdout] 362 |     fn op_Fx29(&mut self, x: usize) -> (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/mod.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 |     fn op_Fx33(&mut self, x: usize) -> (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/mod.rs:376:8
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn op_Fx55(&mut self, x: usize) -> (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/mod.rs:387:8
[INFO] [stdout]     |
[INFO] [stdout] 387 |     fn op_Fx65(&mut self, x: usize) -> (usize) {
[INFO] [stdout]     |        ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `op_fx65`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_2nnn_and_00EE` should have a snake case name
[INFO] [stdout]   --> src/cpu/tests.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn test_2nnn_and_00EE() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_2nnn_and_00_ee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_8xyE` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:170:19
[INFO] [stdout]     |
[INFO] [stdout] 170 | test_register_op!(test_8xyE, 0x821E, 123, 20, 40, 0);
[INFO] [stdout]     |                   ^^^^^^^^^ help: convert the identifier to snake case: `test_8xy_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_8xyE_odd` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:171:19
[INFO] [stdout]     |
[INFO] [stdout] 171 | test_register_op!(test_8xyE_odd, 0x821E, 123, 21, 42, 1);
[INFO] [stdout]     |                   ^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_8xy_e_odd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Annn` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn test_Annn() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `test_annn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Bnnn` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:195:4
[INFO] [stdout]     |
[INFO] [stdout] 195 | fn test_Bnnn() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `test_bnnn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Dxyn` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:204:4
[INFO] [stdout]     |
[INFO] [stdout] 204 | fn test_Dxyn() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `test_dxyn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Cnnn` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn test_Cnnn() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_cnnn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx1E` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:222:4
[INFO] [stdout]     |
[INFO] [stdout] 222 | fn test_Fx1E() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case: `test_fx1_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx29` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:232:4
[INFO] [stdout]     |
[INFO] [stdout] 232 | fn test_Fx29() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx29`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx33` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:248:4
[INFO] [stdout]     |
[INFO] [stdout] 248 | fn test_Fx33() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx33`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx55` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:260:4
[INFO] [stdout]     |
[INFO] [stdout] 260 | fn test_Fx55() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx55`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx65` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:277:4
[INFO] [stdout]     |
[INFO] [stdout] 277 | fn test_Fx65() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx65`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx07` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:292:4
[INFO] [stdout]     |
[INFO] [stdout] 292 | fn test_Fx07() {
[INFO] [stdout]     |    ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx07`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Fx15_and_Fx18` should have a snake case name
[INFO] [stdout]    --> src/cpu/tests.rs:301:4
[INFO] [stdout]     |
[INFO] [stdout] 301 | fn test_Fx15_and_Fx18() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_fx15_and_fx18`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/rom.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     file.read(buf);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = file.read(buf);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.7.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "8eb31d96f8a9396d32dfe58f72a91eed768d31ae0ef0c14af0bfae3d4de2b2cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb31d96f8a9396d32dfe58f72a91eed768d31ae0ef0c14af0bfae3d4de2b2cf", kill_on_drop: false }`
[INFO] [stdout] 8eb31d96f8a9396d32dfe58f72a91eed768d31ae0ef0c14af0bfae3d4de2b2cf