[INFO] cloning repository https://github.com/EmilNorden/rustnes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EmilNorden/rustnes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmilNorden%2Frustnes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmilNorden%2Frustnes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80cab6ca1ca2b33cb5c255eb250aa7125b56df27
[INFO] testing EmilNorden/rustnes against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmilNorden%2Frustnes" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EmilNorden/rustnes on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EmilNorden/rustnes
[INFO] finished tweaking git repo https://github.com/EmilNorden/rustnes
[INFO] tweaked toml for git repo https://github.com/EmilNorden/rustnes written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/EmilNorden/rustnes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-14/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 982dfd9bc873973d9c88b106e2f10e31070fede70874a40174d8f5005fa1b9b0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "982dfd9bc873973d9c88b106e2f10e31070fede70874a40174d8f5005fa1b9b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "982dfd9bc873973d9c88b106e2f10e31070fede70874a40174d8f5005fa1b9b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982dfd9bc873973d9c88b106e2f10e31070fede70874a40174d8f5005fa1b9b0", kill_on_drop: false }`
[INFO] [stdout] 982dfd9bc873973d9c88b106e2f10e31070fede70874a40174d8f5005fa1b9b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b887896c987e3a89bfce19bc126e513e7837bb97167a6c14cc908104290b02bb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b887896c987e3a89bfce19bc126e513e7837bb97167a6c14cc908104290b02bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling gl v0.14.0
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stderr]    Compiling rustnes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::cpuregisters::CPURegisters`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::cpuregisters::CPURegisters;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ppu::PPU`
[INFO] [stdout]  --> src/ram_controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ppu::PPU;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/cartridge.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufReader, Read, Seek, SeekFrom};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/cartridge.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `should_break`
[INFO] [stdout]    --> src/main.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut should_break = false;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_should_break`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ffff`
[INFO] [stdout]    --> src/main.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |             let ffff = 2323;
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_ffff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]   --> src/cpu.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let foo = 2;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]    --> src/ppu.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |             let foo = 3;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut should_break = false;
[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: field is never read: `vram`
[INFO] [stdout]   --> src/ppu.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     vram: &'a RefCell<VRAMController>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `context`
[INFO] [stdout]  --> src/window.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     context: GLContext,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.83s
[INFO] running `Command { std: "docker" "inspect" "b887896c987e3a89bfce19bc126e513e7837bb97167a6c14cc908104290b02bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b887896c987e3a89bfce19bc126e513e7837bb97167a6c14cc908104290b02bb", kill_on_drop: false }`
[INFO] [stdout] b887896c987e3a89bfce19bc126e513e7837bb97167a6c14cc908104290b02bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72f62e4fdc3370cd92ce30fefa460398624fe4151b6bdfdd5d8bdde29a9c8ae2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "72f62e4fdc3370cd92ce30fefa460398624fe4151b6bdfdd5d8bdde29a9c8ae2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustnes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::cpuregisters::CPURegisters`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::cpuregisters::CPURegisters;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ppu::PPU`
[INFO] [stdout]  --> src/ram_controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ppu::PPU;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/cartridge.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufReader, Read, Seek, SeekFrom};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/cartridge.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `should_break`
[INFO] [stdout]    --> src/main.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut should_break = false;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_should_break`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ffff`
[INFO] [stdout]    --> src/main.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |             let ffff = 2323;
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_ffff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]   --> src/cpu.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let foo = 2;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]    --> src/ppu.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |             let foo = 3;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut should_break = false;
[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: field is never read: `vram`
[INFO] [stdout]   --> src/ppu.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     vram: &'a RefCell<VRAMController>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `context`
[INFO] [stdout]  --> src/window.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     context: GLContext,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.68s
[INFO] running `Command { std: "docker" "inspect" "72f62e4fdc3370cd92ce30fefa460398624fe4151b6bdfdd5d8bdde29a9c8ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72f62e4fdc3370cd92ce30fefa460398624fe4151b6bdfdd5d8bdde29a9c8ae2", kill_on_drop: false }`
[INFO] [stdout] 72f62e4fdc3370cd92ce30fefa460398624fe4151b6bdfdd5d8bdde29a9c8ae2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e1d186a071d08c8a95da9aa40e99bb74b13af118589a30ffa85f6aa44f17c56a
[INFO] running `Command { std: "docker" "start" "-a" "e1d186a071d08c8a95da9aa40e99bb74b13af118589a30ffa85f6aa44f17c56a", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::cpuregisters::CPURegisters`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::cpuregisters::CPURegisters;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::ppu::PPU`
[INFO] [stderr]  --> src/ram_controller.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::ppu::PPU;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufReader`
[INFO] [stderr]  --> src/cartridge.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{BufReader, Read, Seek, SeekFrom};
[INFO] [stderr]   |               ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/cartridge.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `should_break`
[INFO] [stderr]    --> src/main.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let mut should_break = false;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_should_break`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ffff`
[INFO] [stderr]    --> src/main.rs:170:17
[INFO] [stderr]     |
[INFO] [stderr] 170 |             let ffff = 2323;
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_ffff`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `foo`
[INFO] [stderr]   --> src/cpu.rs:49:17
[INFO] [stderr]    |
[INFO] [stderr] 49 |             let foo = 2;
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `foo`
[INFO] [stderr]    --> src/ppu.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |             let foo = 3;
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let mut should_break = false;
[INFO] [stderr]     |         ----^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `vram`
[INFO] [stderr]   --> src/ppu.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     vram: &'a RefCell<VRAMController>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `context`
[INFO] [stderr]  --> src/window.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     context: GLContext,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rustnes-d540e90465ff36b6
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e1d186a071d08c8a95da9aa40e99bb74b13af118589a30ffa85f6aa44f17c56a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1d186a071d08c8a95da9aa40e99bb74b13af118589a30ffa85f6aa44f17c56a", kill_on_drop: false }`
[INFO] [stdout] e1d186a071d08c8a95da9aa40e99bb74b13af118589a30ffa85f6aa44f17c56a