[INFO] cloning repository https://github.com/WuGambinos/chip8-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/WuGambinos/chip8-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWuGambinos%2Fchip8-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWuGambinos%2Fchip8-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aaa7e3c0502a25d5e541f58f962564b6175c7724
[INFO] checking WuGambinos/chip8-rust against master#5b270e1198e911247244b035a6f06ce3af0a4420 for pr-126571-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWuGambinos%2Fchip8-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WuGambinos/chip8-rust on toolchain 5b270e1198e911247244b035a6f06ce3af0a4420
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5b270e1198e911247244b035a6f06ce3af0a4420" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/WuGambinos/chip8-rust
[INFO] finished tweaking git repo https://github.com/WuGambinos/chip8-rust
[INFO] tweaked toml for git repo https://github.com/WuGambinos/chip8-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/WuGambinos/chip8-rust 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" "+5b270e1198e911247244b035a6f06ce3af0a4420" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5b270e1198e911247244b035a6f06ce3af0a4420" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc28a8e2fd75635991919aea31c38f088be13224fc240af31c33387c22a958b3
[INFO] running `Command { std: "docker" "start" "-a" "bc28a8e2fd75635991919aea31c38f088be13224fc240af31c33387c22a958b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc28a8e2fd75635991919aea31c38f088be13224fc240af31c33387c22a958b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc28a8e2fd75635991919aea31c38f088be13224fc240af31c33387c22a958b3", kill_on_drop: false }`
[INFO] [stdout] bc28a8e2fd75635991919aea31c38f088be13224fc240af31c33387c22a958b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+5b270e1198e911247244b035a6f06ce3af0a4420" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1f970fe3e3c3cb9474c85b1bf3641e3c2d9a524bcafb13b10b2a61bdfc64890
[INFO] running `Command { std: "docker" "start" "-a" "f1f970fe3e3c3cb9474c85b1bf3641e3c2d9a524bcafb13b10b2a61bdfc64890", kill_on_drop: false }`
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[INFO] [stderr]     Checking chip8-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::sound`
[INFO] [stdout]  --> src/chip.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::sound;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SineWave` and `Source`
[INFO] [stdout]  --> src/sound.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rodio::source::{SineWave, Source};
[INFO] [stdout]   |                     ^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decoder` and `Sink`
[INFO] [stdout]  --> src/sound.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rodio::{Decoder, OutputStream, Sink};
[INFO] [stdout]   |             ^^^^^^^                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::sound`
[INFO] [stdout]  --> src/chip.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::sound;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/sound.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SineWave` and `Source`
[INFO] [stdout]  --> src/sound.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rodio::source::{SineWave, Source};
[INFO] [stdout]   |                     ^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decoder` and `Sink`
[INFO] [stdout]  --> src/sound.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rodio::{Decoder, OutputStream, Sink};
[INFO] [stdout]   |             ^^^^^^^                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/sound.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chip.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let mut pixel = self.memory[(self.i + (yline as u16)) as usize];
[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/chip.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let mut pixel = self.memory[(self.i + (yline as u16)) as usize];
[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: unused variable: `stream_handle`
[INFO] [stdout]  --> src/sound.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (_stream, stream_handle) = match OutputStream::try_default() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_handle`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream_handle`
[INFO] [stdout]  --> src/sound.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (_stream, stream_handle) = match OutputStream::try_default() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_handle`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `font_size` is never read
[INFO] [stdout]   --> src/support.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct System {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub font_size: f32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `font_size` is never read
[INFO] [stdout]   --> src/support.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct System {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub font_size: f32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 28s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.2.0, traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "f1f970fe3e3c3cb9474c85b1bf3641e3c2d9a524bcafb13b10b2a61bdfc64890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1f970fe3e3c3cb9474c85b1bf3641e3c2d9a524bcafb13b10b2a61bdfc64890", kill_on_drop: false }`
[INFO] [stdout] f1f970fe3e3c3cb9474c85b1bf3641e3c2d9a524bcafb13b10b2a61bdfc64890
[INFO] checking WuGambinos/chip8-rust against try#0ecd73ac69e42f0c7915911f31169e93143ae55d for pr-126571-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWuGambinos%2Fchip8-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/WuGambinos/chip8-rust on toolchain 0ecd73ac69e42f0c7915911f31169e93143ae55d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0ecd73ac69e42f0c7915911f31169e93143ae55d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/WuGambinos/chip8-rust
[INFO] finished tweaking git repo https://github.com/WuGambinos/chip8-rust
[INFO] tweaked toml for git repo https://github.com/WuGambinos/chip8-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/WuGambinos/chip8-rust 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" "+0ecd73ac69e42f0c7915911f31169e93143ae55d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+0ecd73ac69e42f0c7915911f31169e93143ae55d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a1925cdb969a6db2335d5162b84593dc34daedee6acb355144fe8c7da8e9a8c
[INFO] running `Command { std: "docker" "start" "-a" "5a1925cdb969a6db2335d5162b84593dc34daedee6acb355144fe8c7da8e9a8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a1925cdb969a6db2335d5162b84593dc34daedee6acb355144fe8c7da8e9a8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a1925cdb969a6db2335d5162b84593dc34daedee6acb355144fe8c7da8e9a8c", kill_on_drop: false }`
[INFO] [stdout] 5a1925cdb969a6db2335d5162b84593dc34daedee6acb355144fe8c7da8e9a8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+0ecd73ac69e42f0c7915911f31169e93143ae55d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7c16f842469165a9dece5bea9882ddc0331c2b2546dc343d3ac9349a1e6ff89
[INFO] running `Command { std: "docker" "start" "-a" "b7c16f842469165a9dece5bea9882ddc0331c2b2546dc343d3ac9349a1e6ff89", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `crate::sound`
[INFO] [stdout]  --> src/chip.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::sound;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SineWave` and `Source`
[INFO] [stdout]  --> src/sound.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rodio::source::{SineWave, Source};
[INFO] [stdout]   |                     ^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decoder` and `Sink`
[INFO] [stdout]  --> src/sound.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rodio::{Decoder, OutputStream, Sink};
[INFO] [stdout]   |             ^^^^^^^                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/sound.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::sound`
[INFO] [stdout]  --> src/chip.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::sound;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SineWave` and `Source`
[INFO] [stdout]  --> src/sound.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rodio::source::{SineWave, Source};
[INFO] [stdout]   |                     ^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Decoder` and `Sink`
[INFO] [stdout]  --> src/sound.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rodio::{Decoder, OutputStream, Sink};
[INFO] [stdout]   |             ^^^^^^^                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/sound.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chip.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let mut pixel = self.memory[(self.i + (yline as u16)) as usize];
[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/chip.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let mut pixel = self.memory[(self.i + (yline as u16)) as usize];
[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: unused variable: `stream_handle`
[INFO] [stdout]  --> src/sound.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (_stream, stream_handle) = match OutputStream::try_default() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_handle`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream_handle`
[INFO] [stdout]  --> src/sound.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (_stream, stream_handle) = match OutputStream::try_default() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream_handle`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `font_size` is never read
[INFO] [stdout]   --> src/support.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct System {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub font_size: f32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `font_size` is never read
[INFO] [stdout]   --> src/support.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct System {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub font_size: f32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.2.0, traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "b7c16f842469165a9dece5bea9882ddc0331c2b2546dc343d3ac9349a1e6ff89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7c16f842469165a9dece5bea9882ddc0331c2b2546dc343d3ac9349a1e6ff89", kill_on_drop: false }`
[INFO] [stdout] b7c16f842469165a9dece5bea9882ddc0331c2b2546dc343d3ac9349a1e6ff89