[INFO] cloning repository https://github.com/esfacumon/octorust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/esfacumon/octorust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesfacumon%2Foctorust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesfacumon%2Foctorust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bfc3899ad3f50edec8458cca2673dc7c96e465c
[INFO] testing esfacumon/octorust against 1.97.0-beta.6 for beta-1.98-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesfacumon%2Foctorust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/esfacumon/octorust
[INFO] finished tweaking git repo https://github.com/esfacumon/octorust
[INFO] tweaked toml for git repo https://github.com/esfacumon/octorust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/esfacumon/octorust on toolchain 1.97.0-beta.6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.97.0-beta.6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/esfacumon/octorust 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" "+1.97.0-beta.6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded as-raw-xcb-connection v1.0.0
[INFO] [stderr]   Downloaded cursor-icon v1.0.0
[INFO] [stderr]   Downloaded web-time v0.2.3
[INFO] [stderr]   Downloaded xcursor v0.3.4
[INFO] [stderr]   Downloaded libloading v0.8.0
[INFO] [stderr]   Downloaded memmap2 v0.9.0
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.35
[INFO] [stderr]   Downloaded strict-num v0.1.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.67
[INFO] [stderr]   Downloaded concurrent-queue v2.3.0
[INFO] [stderr]   Downloaded ab_glyph v0.2.21
[INFO] [stderr]   Downloaded toml_datetime v0.6.1
[INFO] [stderr]   Downloaded tiny-skia-path v0.11.2
[INFO] [stderr]   Downloaded num_enum_derive v0.7.0
[INFO] [stderr]   Downloaded objc-sys v0.3.1
[INFO] [stderr]   Downloaded bumpalo v3.12.2
[INFO] [stderr]   Downloaded polling v3.2.0
[INFO] [stderr]   Downloaded num_enum v0.7.0
[INFO] [stderr]   Downloaded getrandom v0.2.9
[INFO] [stderr]   Downloaded sctk-adwaita v0.7.0
[INFO] [stderr]   Downloaded ctor v0.2.4
[INFO] [stderr]   Downloaded version-compare v0.1.1
[INFO] [stderr]   Downloaded io-lifetimes v1.0.10
[INFO] [stderr]   Downloaded cocoa-foundation v0.1.1
[INFO] [stderr]   Downloaded wayland-scanner v0.30.0
[INFO] [stderr]   Downloaded ahash v0.8.6
[INFO] [stderr]   Downloaded softbuffer v0.3.1
[INFO] [stderr]   Downloaded nix v0.26.2
[INFO] [stderr]   Downloaded toml_edit v0.19.8
[INFO] [stderr]   Downloaded wayland-backend v0.1.2
[INFO] [stderr]   Downloaded profiling v1.0.8
[INFO] [stderr]   Downloaded wayland-client v0.30.1
[INFO] [stderr]   Downloaded unicode-width v0.1.10
[INFO] [stderr]   Downloaded gpu-descriptor-types v0.1.1
[INFO] [stderr]   Downloaded gpu-descriptor v0.2.3
[INFO] [stderr]   Downloaded rusttype v0.9.3
[INFO] [stderr]   Downloaded owned_ttf_parser v0.19.0
[INFO] [stderr]   Downloaded addr2line v0.19.0
[INFO] [stderr]   Downloaded winnow v0.4.6
[INFO] [stderr]   Downloaded zerocopy v0.7.15
[INFO] [stderr]   Downloaded miniz_oxide v0.6.2
[INFO] [stderr]   Downloaded backtrace v0.3.67
[INFO] [stderr]   Downloaded slotmap v1.0.6
[INFO] [stderr]   Downloaded tiny-skia v0.11.2
[INFO] [stderr]   Downloaded ttf-parser v0.19.0
[INFO] [stderr]   Downloaded owned_ttf_parser v0.15.2
[INFO] [stderr]   Downloaded ttf-parser v0.15.2
[INFO] [stderr]   Downloaded ultraviolet v0.9.1
[INFO] [stderr]   Downloaded quick-xml v0.23.1
[INFO] [stderr]   Downloaded sdl2 v0.35.2
[INFO] [stderr]   Downloaded glow v0.12.1
[INFO] [stderr]   Downloaded wide v0.7.8
[INFO] [stderr]   Downloaded safe_arch v0.6.0
[INFO] [stderr]   Downloaded android-activity v0.5.0
[INFO] [stderr]   Downloaded rustix v0.38.20
[INFO] [stderr]   Downloaded object v0.30.3
[INFO] [stderr]   Downloaded winit v0.29.2
[INFO] [stderr]   Downloaded ash v0.37.2+1.3.238
[INFO] [stderr]   Downloaded zerocopy-derive v0.7.15
[INFO] [stderr]   Downloaded gimli v0.27.2
[INFO] [stderr]   Downloaded orbclient v0.3.45
[INFO] [stderr]   Downloaded sdl2-sys v0.35.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927
[INFO] running `Command { std: "docker" "start" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling libloading v0.8.0
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling scoped-tls v1.0.1
[INFO] [stderr]    Compiling downcast-rs v1.2.0
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling tracing-core v0.1.31
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]    Compiling dlib v0.5.2
[INFO] [stderr]    Compiling linux-raw-sys v0.4.10
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling ash v0.37.2+1.3.238
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling khronos-egl v4.1.0
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling gpu-alloc-types v0.2.0
[INFO] [stderr]    Compiling gpu-descriptor-types v0.1.1
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling wayland-sys v0.31.1
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling wayland-sys v0.30.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling hexf-parse v0.2.1
[INFO] [stderr]    Compiling codespan-reporting v0.11.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling quick-xml v0.30.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling drm-sys v0.4.0
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling raw-window-handle v0.5.2
[INFO] [stderr]    Compiling gpu-alloc v0.5.4
[INFO] [stderr]    Compiling wgpu-types v0.16.1
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]    Compiling renderdoc-sys v1.0.0
[INFO] [stderr]    Compiling profiling v1.0.8
[INFO] [stderr]    Compiling smithay-client-toolkit v0.18.0
[INFO] [stderr]    Compiling cursor-icon v1.0.0
[INFO] [stderr]    Compiling ab_glyph_rasterizer v0.1.8
[INFO] [stderr]    Compiling drm-fourcc v2.2.0
[INFO] [stderr]    Compiling glow v0.12.1
[INFO] [stderr]    Compiling ttf-parser v0.19.0
[INFO] [stderr]    Compiling nix v0.26.2
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling spirv v0.2.0+1.5.4
[INFO] [stderr]    Compiling wayland-backend v0.3.2
[INFO] [stderr]    Compiling wayland-backend v0.1.2
[INFO] [stderr]    Compiling xkeysym v0.2.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling arrayref v0.3.7
[INFO] [stderr]    Compiling wayland-scanner v0.31.0
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling as-raw-xcb-connection v1.0.0
[INFO] [stderr]    Compiling strict-num v0.1.0
[INFO] [stderr]    Compiling x11rb v0.12.0
[INFO] [stderr]    Compiling memmap2 v0.9.0
[INFO] [stderr]    Compiling gethostname v0.3.0
[INFO] [stderr]    Compiling xcursor v0.3.4
[INFO] [stderr]    Compiling gpu-descriptor v0.2.3
[INFO] [stderr]    Compiling quick-xml v0.23.1
[INFO] [stderr]    Compiling x11-dl v2.21.0
[INFO] [stderr]    Compiling ahash v0.8.6
[INFO] [stderr]    Compiling softbuffer v0.3.1
[INFO] [stderr]    Compiling winit v0.29.2
[INFO] [stderr]    Compiling zerocopy v0.7.15
[INFO] [stderr]    Compiling sdl2 v0.35.2
[INFO] [stderr]    Compiling ttf-parser v0.15.2
[INFO] [stderr]    Compiling xkbcommon-dl v0.4.1
[INFO] [stderr]    Compiling memmap2 v0.7.1
[INFO] [stderr]    Compiling pollster v0.3.0
[INFO] [stderr]    Compiling raw-window-handle v0.6.0
[INFO] [stderr]    Compiling smol_str v0.2.0
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling wayland-scanner v0.30.0
[INFO] [stderr]    Compiling owned_ttf_parser v0.19.0
[INFO] [stderr]    Compiling ab_glyph v0.2.21
[INFO] [stderr]    Compiling owned_ttf_parser v0.15.2
[INFO] [stderr]    Compiling rusttype v0.9.3
[INFO] [stderr]    Compiling polling v3.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling bytemuck_derive v1.5.0
[INFO] [stderr]    Compiling ctor v0.2.4
[INFO] [stderr]    Compiling x11rb-protocol v0.12.0
[INFO] [stderr]    Compiling drm-ffi v0.5.0
[INFO] [stderr]    Compiling tiny-xlib v0.2.2
[INFO] [stderr]    Compiling bytemuck v1.13.1
[INFO] [stderr]    Compiling naga v0.12.3
[INFO] [stderr]    Compiling calloop v0.12.3
[INFO] [stderr]    Compiling safe_arch v0.6.0
[INFO] [stderr]    Compiling tiny-skia-path v0.11.2
[INFO] [stderr]    Compiling drm v0.9.0
[INFO] [stderr]    Compiling wayland-client v0.30.1
[INFO] [stderr]    Compiling wayland-client v0.31.1
[INFO] [stderr]    Compiling wayland-csd-frame v0.3.0
[INFO] [stderr]    Compiling tiny-skia v0.11.2
[INFO] [stderr]    Compiling wide v0.7.8
[INFO] [stderr]    Compiling ultraviolet v0.9.1
[INFO] [stderr]    Compiling wayland-protocols v0.31.0
[INFO] [stderr]    Compiling wayland-cursor v0.31.0
[INFO] [stderr]    Compiling calloop-wayland-source v0.2.0
[INFO] [stderr]    Compiling wgpu-hal v0.16.2
[INFO] [stderr]    Compiling wayland-protocols-wlr v0.2.0
[INFO] [stderr]    Compiling wayland-protocols-plasma v0.2.0
[INFO] [stderr]    Compiling wgpu-core v0.16.1
[INFO] [stderr]    Compiling sctk-adwaita v0.7.0
[INFO] [stderr]    Compiling wgpu v0.16.3
[INFO] [stderr]    Compiling pixels v0.13.0
[INFO] [stderr]    Compiling octorust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `FillScreen` is never constructed
[INFO] [stdout]  --> src/chip8/instruction.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Instruction {
[INFO] [stdout]   |          ----------- variant in this enum
[INFO] [stdout] 2 |     ClearScreen,
[INFO] [stdout] 3 |     FillScreen,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/chip8/errors.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     InvalidAddress(u16),
[INFO] [stdout]   |     -------------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `SubroutineError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -     InvalidAddress(u16),
[INFO] [stdout] 3 +     InvalidAddress(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chip8/errors.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     InvalidRegister(usize),
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RegisterError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 10 -     InvalidRegister(usize),
[INFO] [stdout] 10 +     InvalidRegister(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/chip8/stack.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl<T> Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling octorust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `FillScreen` is never constructed
[INFO] [stdout]  --> src/chip8/instruction.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Instruction {
[INFO] [stdout]   |          ----------- variant in this enum
[INFO] [stdout] 2 |     ClearScreen,
[INFO] [stdout] 3 |     FillScreen,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/chip8/errors.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     InvalidAddress(u16),
[INFO] [stdout]   |     -------------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `SubroutineError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -     InvalidAddress(u16),
[INFO] [stdout] 3 +     InvalidAddress(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chip8/errors.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     InvalidRegister(usize),
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RegisterError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 10 -     InvalidRegister(usize),
[INFO] [stdout] 10 +     InvalidRegister(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/chip8/stack.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl<T> Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: variant `FillScreen` is never constructed
[INFO] [stderr]  --> src/chip8/instruction.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum Instruction {
[INFO] [stderr]   |          ----------- variant in this enum
[INFO] [stderr] 2 |     ClearScreen,
[INFO] [stderr] 3 |     FillScreen,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/chip8/errors.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     InvalidAddress(u16),
[INFO] [stderr]   |     -------------- ^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `SubroutineError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 3 -     InvalidAddress(u16),
[INFO] [stderr] 3 +     InvalidAddress(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/chip8/errors.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 |     InvalidRegister(usize),
[INFO] [stderr]    |     --------------- ^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `RegisterError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 10 -     InvalidRegister(usize),
[INFO] [stderr] 10 +     InvalidRegister(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: method `len` is never used
[INFO] [stderr]   --> src/chip8/stack.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr]  5 | impl<T> Stack<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 26 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `octorust` (bin "octorust" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/octorust-cfb696da0947a277)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test chip8::chip8::tests::test_add ... ok
[INFO] [stdout] test chip8::chip8::tests::test_call_subroutine ... ok
[INFO] [stdout] test chip8::chip8::tests::test_set_i ... ok
[INFO] [stdout] test chip8::chip8::tests::test_get_nibble ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927", kill_on_drop: false }`
[INFO] [stdout] 819675b3dc1cae93b1c31a7a909e8d7f857cfe69142c019caa68fcf1ed7e7927
