[INFO] cloning repository https://github.com/scratchadams/chip8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scratchadams/chip8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscratchadams%2Fchip8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscratchadams%2Fchip8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a881df369f5cd4d15193181ee0c661fce87d929d
[INFO] checking scratchadams/chip8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscratchadams%2Fchip8" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scratchadams/chip8 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scratchadams/chip8
[INFO] finished tweaking git repo https://github.com/scratchadams/chip8
[INFO] tweaked toml for git repo https://github.com/scratchadams/chip8 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/scratchadams/chip8 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23f3335746f2e6871c693bcb6d417f7c5190352f2c96dd56eaf0accaee2b518c
[INFO] running `Command { std: "docker" "start" "-a" "23f3335746f2e6871c693bcb6d417f7c5190352f2c96dd56eaf0accaee2b518c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23f3335746f2e6871c693bcb6d417f7c5190352f2c96dd56eaf0accaee2b518c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23f3335746f2e6871c693bcb6d417f7c5190352f2c96dd56eaf0accaee2b518c", kill_on_drop: false }`
[INFO] [stdout] 23f3335746f2e6871c693bcb6d417f7c5190352f2c96dd56eaf0accaee2b518c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d17356b23d163bce3d8e2e8e8811f64c60694593d68cb367e528b85cda9ca54
[INFO] running `Command { std: "docker" "start" "-a" "0d17356b23d163bce3d8e2e8e8811f64c60694593d68cb367e528b85cda9ca54", kill_on_drop: false }`
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling sdl2 v0.34.5
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling sdl2-sys v0.34.5
[INFO] [stderr]     Checking chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `sdl2::event::Event`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use sdl2::event::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2::keyboard::Keycode`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use sdl2::keyboard::Keycode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 |     if(pos == 8) {
[INFO] [stdout]    |       ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 32 -     if(pos == 8) {
[INFO] [stdout] 32 +     if pos == 8 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:152:23
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 reg.V[(var2 as usize)] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout]     |                       ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 152 -                 reg.V[(var2 as usize)] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout] 152 +                 reg.V[var2 as usize] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:153:55
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 println!("V {:x} = {:x}", var2, reg.V[(var2 as usize)]);
[INFO] [stdout]     |                                                       ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 153 -                 println!("V {:x} = {:x}", var2, reg.V[(var2 as usize)]);
[INFO] [stdout] 153 +                 println!("V {:x} = {:x}", var2, reg.V[var2 as usize]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:176:29
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut N = (var << 12);
[INFO] [stdout]     |                             ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 176 -                 let mut N = (var << 12);
[INFO] [stdout] 176 +                 let mut N = var << 12;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:177:21
[INFO] [stdout]     |
[INFO] [stdout] 177 |                 N = (N >> 12);
[INFO] [stdout]     |                     ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 177 -                 N = (N >> 12);
[INFO] [stdout] 177 +                 N = N >> 12;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:181:48
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 display(&mut canvas, &mut reg, (var1 as usize), 
[INFO] [stdout]     |                                                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 181 -                 display(&mut canvas, &mut reg, (var1 as usize), 
[INFO] [stdout] 181 +                 display(&mut canvas, &mut reg, var1 as usize, 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:182:21
[INFO] [stdout]     |
[INFO] [stdout] 182 |                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout]     |                     ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 182 -                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout] 182 +                     var2 as usize, &mut memory, (N as usize)); 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:182:51
[INFO] [stdout]     |
[INFO] [stdout] 182 |                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout]     |                                                   ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 182 -                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout] 182 +                     (var2 as usize), &mut memory, N as usize); 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:185:27
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout]     |                           ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout] 185 +                     reg.V[var1 as usize], reg.V[(var2 as usize)], 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:185:51
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout]     |                                                   ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout] 185 +                     reg.V[(var1 as usize)], reg.V[var2 as usize], 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:186:28
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     memory[(reg.I as usize)]);
[INFO] [stdout]     |                            ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 186 -                     memory[(reg.I as usize)]);
[INFO] [stdout] 186 +                     memory[reg.I as usize]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2::event::Event`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use sdl2::event::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2::keyboard::Keycode`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use sdl2::keyboard::Keycode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 |     if(pos == 8) {
[INFO] [stdout]    |       ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 32 -     if(pos == 8) {
[INFO] [stdout] 32 +     if pos == 8 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:152:23
[INFO] [stdout]     |
[INFO] [stdout] 152 |                 reg.V[(var2 as usize)] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout]     |                       ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 152 -                 reg.V[(var2 as usize)] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout] 152 +                 reg.V[var2 as usize] = (((var2 << 8) as u16) ^ var) as u8; 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:153:55
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 println!("V {:x} = {:x}", var2, reg.V[(var2 as usize)]);
[INFO] [stdout]     |                                                       ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 153 -                 println!("V {:x} = {:x}", var2, reg.V[(var2 as usize)]);
[INFO] [stdout] 153 +                 println!("V {:x} = {:x}", var2, reg.V[var2 as usize]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:176:29
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut N = (var << 12);
[INFO] [stdout]     |                             ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 176 -                 let mut N = (var << 12);
[INFO] [stdout] 176 +                 let mut N = var << 12;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:177:21
[INFO] [stdout]     |
[INFO] [stdout] 177 |                 N = (N >> 12);
[INFO] [stdout]     |                     ^       ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 177 -                 N = (N >> 12);
[INFO] [stdout] 177 +                 N = N >> 12;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:181:48
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 display(&mut canvas, &mut reg, (var1 as usize), 
[INFO] [stdout]     |                                                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 181 -                 display(&mut canvas, &mut reg, (var1 as usize), 
[INFO] [stdout] 181 +                 display(&mut canvas, &mut reg, var1 as usize, 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:182:21
[INFO] [stdout]     |
[INFO] [stdout] 182 |                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout]     |                     ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 182 -                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout] 182 +                     var2 as usize, &mut memory, (N as usize)); 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/main.rs:182:51
[INFO] [stdout]     |
[INFO] [stdout] 182 |                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout]     |                                                   ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 182 -                     (var2 as usize), &mut memory, (N as usize)); 
[INFO] [stdout] 182 +                     (var2 as usize), &mut memory, N as usize); 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:185:27
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout]     |                           ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout] 185 +                     reg.V[var1 as usize], reg.V[(var2 as usize)], 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:185:51
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout]     |                                                   ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 185 -                     reg.V[(var1 as usize)], reg.V[(var2 as usize)], 
[INFO] [stdout] 185 +                     reg.V[(var1 as usize)], reg.V[var2 as usize], 
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/main.rs:186:28
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     memory[(reg.I as usize)]);
[INFO] [stdout]     |                            ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 186 -                     memory[(reg.I as usize)]);
[INFO] [stdout] 186 +                     memory[reg.I as usize]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/main.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |             thread::sleep_ms(10);
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/main.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |             thread::sleep_ms(10);
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let mut i = 0;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut i = 0;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let mut i = 0;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut i = 0;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let mut i = 0;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut i = 0;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let mut i = 0;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:115:9
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let mut i = 0;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `SP` is never read
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Registers {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     SP: u16,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     V: [u8; 16],
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     I: u16,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `SP` should have a snake case name
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     SP: u16,
[INFO] [stdout]    |     ^^ help: convert the identifier to snake case: `sp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `PC` should have a snake case name
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     PC: u16,
[INFO] [stdout]    |     ^^ help: convert the identifier to snake case: `pc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `X` should have a snake case name
[INFO] [stdout]   --> src/main.rs:39:60
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn display(canvas: &mut WindowCanvas, reg: &mut Registers, X: usize, 
[INFO] [stdout]    |                                                            ^ help: convert the identifier to snake case (notice the capitalization): `x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Y` should have a snake case name
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Y: usize, memory: &mut [u8; 4096], N: usize) {
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:40:40
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Y: usize, memory: &mut [u8; 4096], N: usize) {
[INFO] [stdout]    |                                        ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[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] 52 |                 let _ = canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let _ = canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     chp8_dissassemble(&chp8_file_contents);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let _ = chp8_dissassemble(&chp8_file_contents);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:176:25
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut N = (var << 12);
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `SP` is never read
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Registers {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     SP: u16,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     V: [u8; 16],
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     I: u16,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `SP` should have a snake case name
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     SP: u16,
[INFO] [stdout]    |     ^^ help: convert the identifier to snake case: `sp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `PC` should have a snake case name
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     PC: u16,
[INFO] [stdout]    |     ^^ help: convert the identifier to snake case: `pc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `X` should have a snake case name
[INFO] [stdout]   --> src/main.rs:39:60
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn display(canvas: &mut WindowCanvas, reg: &mut Registers, X: usize, 
[INFO] [stdout]    |                                                            ^ help: convert the identifier to snake case (notice the capitalization): `x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Y` should have a snake case name
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Y: usize, memory: &mut [u8; 4096], N: usize) {
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:40:40
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Y: usize, memory: &mut [u8; 4096], N: usize) {
[INFO] [stdout]    |                                        ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[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] 52 |                 let _ = canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let _ = canvas.fill_rect(Rect::new(x_pos, y_pos, 8, 8));
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     chp8_dissassemble(&chp8_file_contents);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let _ = chp8_dissassemble(&chp8_file_contents);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:176:25
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut N = (var << 12);
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.51s
[INFO] running `Command { std: "docker" "inspect" "0d17356b23d163bce3d8e2e8e8811f64c60694593d68cb367e528b85cda9ca54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d17356b23d163bce3d8e2e8e8811f64c60694593d68cb367e528b85cda9ca54", kill_on_drop: false }`
[INFO] [stdout] 0d17356b23d163bce3d8e2e8e8811f64c60694593d68cb367e528b85cda9ca54