Dec 18 08:37:55.456 INFO checking AmaranthineCodices/chip8-int against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:37:55.456 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/AmaranthineCodices/chip8-int:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:37:55.618 INFO [stdout] 6ddccb73fb1b6a472405bb7672d1fe7c7fba1b216b50ae265111409d6c62539d
Dec 18 08:37:55.630 INFO running `"docker" "start" "-a" "6ddccb73fb1b6a472405bb7672d1fe7c7fba1b216b50ae265111409d6c62539d"`
Dec 18 08:37:56.420 INFO [stderr]     Checking num-integer v0.1.36
Dec 18 08:37:56.420 INFO [stderr]     Checking wayland-client v0.12.5
Dec 18 08:37:56.423 INFO [stderr]     Checking pistoncore-input v0.20.0
Dec 18 08:37:56.888 INFO [stderr]     Checking num-iter v0.1.35
Dec 18 08:37:56.888 INFO [stderr]     Checking num-rational v0.1.42
Dec 18 08:37:57.268 INFO [stderr]     Checking png v0.11.0
Dec 18 08:37:58.386 INFO [stderr]     Checking wayland-protocols v0.12.5
Dec 18 08:37:58.386 INFO [stderr]     Checking wayland-kbd v0.13.1
Dec 18 08:37:59.018 INFO [stderr]     Checking image v0.18.0
Dec 18 08:38:00.820 INFO [stderr]     Checking pistoncore-window v0.31.0
Dec 18 08:38:02.920 INFO [stderr]     Checking wayland-window v0.13.2
Dec 18 08:38:03.929 INFO [stderr]     Checking winit v0.10.0
Dec 18 08:38:04.226 INFO [stderr]     Checking piston2d-opengl_graphics v0.52.0
Dec 18 08:38:04.624 INFO [stderr]     Checking pistoncore-event_loop v0.36.0
Dec 18 08:38:05.421 INFO [stderr]     Checking piston v0.36.0
Dec 18 08:38:05.880 INFO [stderr]     Checking glutin v0.12.2
Dec 18 08:38:07.215 INFO [stderr]     Checking pistoncore-glutin_window v0.45.2
Dec 18 08:38:08.317 INFO [stderr]     Checking chip8-int v0.1.0 (/opt/crater/workdir)
Dec 18 08:38:08.737 INFO [stderr] warning: constant item is never used: `MEM_SIZE`
Dec 18 08:38:08.737 INFO [stderr]  --> src/chip8.rs:1:1
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr] 1 | const MEM_SIZE: usize = 0x1000;
Dec 18 08:38:08.738 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: constant item is never used: `GFX_SIZE_X`
Dec 18 08:38:08.738 INFO [stderr]  --> src/chip8.rs:2:1
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr] 2 | const GFX_SIZE_X: usize = 64;
Dec 18 08:38:08.738 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: constant item is never used: `GFX_SIZE_Y`
Dec 18 08:38:08.738 INFO [stderr]  --> src/chip8.rs:3:1
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr] 3 | const GFX_SIZE_Y: usize = 32;
Dec 18 08:38:08.738 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `ClearDisplay`
Dec 18 08:38:08.738 INFO [stderr]  --> src/chip8.rs:8:5
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr] 8 |     ClearDisplay,
Dec 18 08:38:08.738 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `Return`
Dec 18 08:38:08.738 INFO [stderr]  --> src/chip8.rs:9:5
Dec 18 08:38:08.738 INFO [stderr]   |
Dec 18 08:38:08.738 INFO [stderr] 9 |     Return,
Dec 18 08:38:08.738 INFO [stderr]   |     ^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `Jump`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:11:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 11 |     Jump { address: u16 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `Call`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:13:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 13 |     Call { address: u16 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `SkipIfEqual`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:15:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 15 |     SkipIfEqual { register: usize, value: u8 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `SkipIfNotEqual`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:17:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 17 |     SkipIfNotEqual { register: usize, value: u8 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `SkipIfRegistersEqual`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:19:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 19 |     SkipIfRegistersEqual { register1: usize, register2: usize },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `SetRegister`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:21:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 21 |     SetRegister { register: usize, value: u8 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `AddConstant`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:23:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 23 |     AddConstant { register: usize, value: u8 },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `CopyRegister`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:25:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 25 |     CopyRegister { source: usize, target: usize },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `BitOr`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:27:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 27 |     BitOr { target: usize, other: usize },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `BitAnd`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:29:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.738 INFO [stderr] 29 |     BitAnd { target: usize, other: usize },
Dec 18 08:38:08.738 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.738 INFO [stderr] 
Dec 18 08:38:08.738 INFO [stderr] warning: variant is never constructed: `BitXor`
Dec 18 08:38:08.738 INFO [stderr]   --> src/chip8.rs:31:5
Dec 18 08:38:08.738 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 31 |     BitXor { target: usize, other: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `AddRegister`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:33:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 33 |     AddRegister { target: usize, other: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SubtractRegister`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:35:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 35 |     SubtractRegister { target: usize, other: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `AltSubtractRegister`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:37:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 37 |     AltSubtractRegister { target: usize, other: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `LeftShift`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:39:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 39 |     LeftShift { target: usize, source: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `RightShift`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:41:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 41 |     RightShift { target: usize, source: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SkipIfRegistersNotEqual`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:43:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 43 |     SkipIfRegistersNotEqual { register1: usize, register2: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SetIndexRegister`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:45:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 45 |     SetIndexRegister { value: u16 },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `OffsetJump`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:47:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 47 |     OffsetJump { address: u16 },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `Rand`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:49:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 49 |     Rand { mask: u8, register: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `Display`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:51:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 51 |     Display { x: usize, y: usize, height: u8 },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SkipIfKeyPressed`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:53:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 53 |     SkipIfKeyPressed { key: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SkipIfKeyNotPressed`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:55:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 55 |     SkipIfKeyNotPressed { key: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `GetDelayTimer`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:57:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 57 |     GetDelayTimer { register: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `AwaitKeypress`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:59:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 59 |     AwaitKeypress { register: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SetDelayTimer`
Dec 18 08:38:08.739 INFO [stderr]   --> src/chip8.rs:61:5
Dec 18 08:38:08.739 INFO [stderr]    |
Dec 18 08:38:08.739 INFO [stderr] 61 |     SetDelayTimer { value: usize },
Dec 18 08:38:08.739 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.739 INFO [stderr] 
Dec 18 08:38:08.739 INFO [stderr] warning: variant is never constructed: `SetSoundTimer`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:63:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 63 |     SetSoundTimer { value: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: variant is never constructed: `IncrementIndexRegister`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:65:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 65 |     IncrementIndexRegister { register: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: variant is never constructed: `SetIndexToFont`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:67:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 67 |     SetIndexToFont { register: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: variant is never constructed: `StoreDecimal`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:69:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 69 |     StoreDecimal { register: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: variant is never constructed: `MemDump`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:71:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 71 |     MemDump { max_register: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: variant is never constructed: `MemLoad`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:73:5
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 73 |     MemLoad { max_register: usize },
Dec 18 08:38:08.740 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: function is never used: `decode_opcode`
Dec 18 08:38:08.740 INFO [stderr]   --> src/chip8.rs:76:1
Dec 18 08:38:08.740 INFO [stderr]    |
Dec 18 08:38:08.740 INFO [stderr] 76 | fn decode_opcode(opcode: u16) -> Option<Opcode> {
Dec 18 08:38:08.740 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: struct is never constructed: `Chip8`
Dec 18 08:38:08.740 INFO [stderr]    --> src/chip8.rs:291:1
Dec 18 08:38:08.740 INFO [stderr]     |
Dec 18 08:38:08.740 INFO [stderr] 291 | pub struct Chip8 {
Dec 18 08:38:08.740 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: method is never used: `new`
Dec 18 08:38:08.740 INFO [stderr]    --> src/chip8.rs:307:5
Dec 18 08:38:08.740 INFO [stderr]     |
Dec 18 08:38:08.740 INFO [stderr] 307 |     pub fn new() -> Chip8 {
Dec 18 08:38:08.740 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: method is never used: `execute_opcode`
Dec 18 08:38:08.740 INFO [stderr]    --> src/chip8.rs:322:5
Dec 18 08:38:08.740 INFO [stderr]     |
Dec 18 08:38:08.740 INFO [stderr] 322 |     fn execute_opcode(&mut self, opcode: Opcode) {
Dec 18 08:38:08.740 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: method is never used: `process_next_opcode`
Dec 18 08:38:08.740 INFO [stderr]    --> src/chip8.rs:479:5
Dec 18 08:38:08.740 INFO [stderr]     |
Dec 18 08:38:08.740 INFO [stderr] 479 |     fn process_next_opcode(&mut self) {
Dec 18 08:38:08.740 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:08.740 INFO [stderr] warning: method is never used: `step`
Dec 18 08:38:08.740 INFO [stderr]    --> src/chip8.rs:505:5
Dec 18 08:38:08.740 INFO [stderr]     |
Dec 18 08:38:08.740 INFO [stderr] 505 |     pub fn step(&mut self) {
Dec 18 08:38:08.740 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:38:08.740 INFO [stderr] 
Dec 18 08:38:09.293 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.13s
Dec 18 08:38:10.146 INFO running `"docker" "inspect" "6ddccb73fb1b6a472405bb7672d1fe7c7fba1b216b50ae265111409d6c62539d"`
Dec 18 08:38:10.342 INFO running `"docker" "rm" "-f" "6ddccb73fb1b6a472405bb7672d1fe7c7fba1b216b50ae265111409d6c62539d"`
Dec 18 08:38:10.604 INFO [stdout] 6ddccb73fb1b6a472405bb7672d1fe7c7fba1b216b50ae265111409d6c62539d