[INFO] cloning repository https://github.com/TrevorS/rustychip8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TrevorS/rustychip8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrevorS%2Frustychip8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrevorS%2Frustychip8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 354b7e4d37a2e33b987fca40201057208625015e
[INFO] checking TrevorS/rustychip8 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrevorS%2Frustychip8" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TrevorS/rustychip8 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TrevorS/rustychip8
[INFO] finished tweaking git repo https://github.com/TrevorS/rustychip8
[INFO] tweaked toml for git repo https://github.com/TrevorS/rustychip8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/TrevorS/rustychip8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/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[INFO] the lockfile is outdated, regenerating it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" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89de06d12108f3558154722cf74974dda2fb77476ee45f500a57d735e8cdf680
[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" "89de06d12108f3558154722cf74974dda2fb77476ee45f500a57d735e8cdf680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89de06d12108f3558154722cf74974dda2fb77476ee45f500a57d735e8cdf680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89de06d12108f3558154722cf74974dda2fb77476ee45f500a57d735e8cdf680", kill_on_drop: false }`
[INFO] [stdout] 89de06d12108f3558154722cf74974dda2fb77476ee45f500a57d735e8cdf680
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 75a05bbeee455e2b2a9770c38d3452011362179bbade3972ebcad0ac22eccfa8
[INFO] running `Command { std: "docker" "start" "-a" "75a05bbeee455e2b2a9770c38d3452011362179bbade3972ebcad0ac22eccfa8", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling sdl2-sys v0.19.0
[INFO] [stderr]     Checking bitflags v0.6.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking sdl2 v0.20.1
[INFO] [stderr]     Checking rustychip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/mmu.rs:75:22
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut file   = try!(File::open(filename));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/mmu.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 |     try!(file.read_to_end(&mut buffer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:66:20
[INFO] [stdout]    |
[INFO] [stdout] 66 |             0x1000 ... 0x1FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:69:20
[INFO] [stdout]    |
[INFO] [stdout] 69 |             0x2000 ... 0x2FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:72:20
[INFO] [stdout]    |
[INFO] [stdout] 72 |             0x3000 ... 0x3FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:75:20
[INFO] [stdout]    |
[INFO] [stdout] 75 |             0x4000 ... 0x4FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:78:20
[INFO] [stdout]    |
[INFO] [stdout] 78 |             0x5000 ... 0x5FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |             0x6000 ... 0x6FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:84:20
[INFO] [stdout]    |
[INFO] [stdout] 84 |             0x7000 ... 0x7FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |             0x8000 ... 0x8FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 |             0x9000 ... 0x9FFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:124:20
[INFO] [stdout]     |
[INFO] [stdout] 124 |             0xA000 ... 0xAFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:127:20
[INFO] [stdout]     |
[INFO] [stdout] 127 |             0xB000 ... 0xBFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:130:20
[INFO] [stdout]     |
[INFO] [stdout] 130 |             0xC000 ... 0xCFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:133:20
[INFO] [stdout]     |
[INFO] [stdout] 133 |             0xD000 ... 0xDFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:136:20
[INFO] [stdout]     |
[INFO] [stdout] 136 |             0xE000 ... 0xEFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:149:20
[INFO] [stdout]     |
[INFO] [stdout] 149 |             0xF000 ... 0xFFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cpu::Cpu`
[INFO] [stdout]  --> src/term_gfx.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cpu::Cpu;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/mmu.rs:75:22
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut file   = try!(File::open(filename));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/mmu.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 |     try!(file.read_to_end(&mut buffer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:66:20
[INFO] [stdout]    |
[INFO] [stdout] 66 |             0x1000 ... 0x1FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:69:20
[INFO] [stdout]    |
[INFO] [stdout] 69 |             0x2000 ... 0x2FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:72:20
[INFO] [stdout]    |
[INFO] [stdout] 72 |             0x3000 ... 0x3FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:75:20
[INFO] [stdout]    |
[INFO] [stdout] 75 |             0x4000 ... 0x4FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:78:20
[INFO] [stdout]    |
[INFO] [stdout] 78 |             0x5000 ... 0x5FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |             0x6000 ... 0x6FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:84:20
[INFO] [stdout]    |
[INFO] [stdout] 84 |             0x7000 ... 0x7FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/cpu.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |             0x8000 ... 0x8FFF => {
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:121:20
[INFO] [stdout]     |
[INFO] [stdout] 121 |             0x9000 ... 0x9FFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:124:20
[INFO] [stdout]     |
[INFO] [stdout] 124 |             0xA000 ... 0xAFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:127:20
[INFO] [stdout]     |
[INFO] [stdout] 127 |             0xB000 ... 0xBFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:130:20
[INFO] [stdout]     |
[INFO] [stdout] 130 |             0xC000 ... 0xCFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:133:20
[INFO] [stdout]     |
[INFO] [stdout] 133 |             0xD000 ... 0xDFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:136:20
[INFO] [stdout]     |
[INFO] [stdout] 136 |             0xE000 ... 0xEFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/cpu.rs:149:20
[INFO] [stdout]     |
[INFO] [stdout] 149 |             0xF000 ... 0xFFFF => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cpu::Cpu`
[INFO] [stdout]  --> src/term_gfx.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cpu::Cpu;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sdl`
[INFO] [stdout]   --> src/main.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let (mut gfx, sdl) = Gfx::new(1);
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_sdl`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pixel` is assigned to, but never used
[INFO] [stdout]   --> src/gfx.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let mut pixel: u8;
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_pixel` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pixel` is never read
[INFO] [stdout]   --> src/gfx.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 pixel = &buffer[y * 64 + x] * 255;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sdl`
[INFO] [stdout]   --> src/main.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let (mut gfx, sdl) = Gfx::new(1);
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_sdl`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pixel` is assigned to, but never used
[INFO] [stdout]   --> src/gfx.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let mut pixel: u8;
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_pixel` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pixel` is never read
[INFO] [stdout]   --> src/gfx.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 pixel = &buffer[y * 64 + x] * 255;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_address`
[INFO] [stdout]    --> src/cpu.rs:583:4
[INFO] [stdout]     |
[INFO] [stdout] 583 | fn print_address(address: u16) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TermGfx`
[INFO] [stdout]  --> src/term_gfx.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct TermGfx { }
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/term_gfx.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn new() -> TermGfx {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `composite`
[INFO] [stdout]   --> src/term_gfx.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn composite(&self, buffer: Vec<u8>) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_address`
[INFO] [stdout]    --> src/cpu.rs:583:4
[INFO] [stdout]     |
[INFO] [stdout] 583 | fn print_address(address: u16) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TermGfx`
[INFO] [stdout]  --> src/term_gfx.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct TermGfx { }
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/term_gfx.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn new() -> TermGfx {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `composite`
[INFO] [stdout]   --> src/term_gfx.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn composite(&self, buffer: Vec<u8>) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/gfx.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 | /                 self.renderer.fill_rect(
[INFO] [stdout] 50 | |                     Rect::new(x as i32, y as i32, self.scale as u32, self.scale as u32));
[INFO] [stdout]    | |_________________________________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/gfx.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 | /                 self.renderer.fill_rect(
[INFO] [stdout] 50 | |                     Rect::new(x as i32, y as i32, self.scale as u32, self.scale as u32));
[INFO] [stdout]    | |_________________________________________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.67s
[INFO] running `Command { std: "docker" "inspect" "75a05bbeee455e2b2a9770c38d3452011362179bbade3972ebcad0ac22eccfa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75a05bbeee455e2b2a9770c38d3452011362179bbade3972ebcad0ac22eccfa8", kill_on_drop: false }`
[INFO] [stdout] 75a05bbeee455e2b2a9770c38d3452011362179bbade3972ebcad0ac22eccfa8