[INFO] cloning repository https://github.com/nryaskin/simulator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nryaskin/simulator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnryaskin%2Fsimulator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnryaskin%2Fsimulator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b4bcc7c1aa8ee0b09452eeb6d6b029bef566993
[INFO] testing nryaskin/simulator against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnryaskin%2Fsimulator" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nryaskin/simulator on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nryaskin/simulator
[INFO] finished tweaking git repo https://github.com/nryaskin/simulator
[INFO] tweaked toml for git repo https://github.com/nryaskin/simulator written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nryaskin/simulator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d39c77b591b48f6eaa70986f09be9cc8ab6d8747bc2a5ead49e7610f137c72a
[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" "7d39c77b591b48f6eaa70986f09be9cc8ab6d8747bc2a5ead49e7610f137c72a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d39c77b591b48f6eaa70986f09be9cc8ab6d8747bc2a5ead49e7610f137c72a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d39c77b591b48f6eaa70986f09be9cc8ab6d8747bc2a5ead49e7610f137c72a", kill_on_drop: false }`
[INFO] [stdout] 7d39c77b591b48f6eaa70986f09be9cc8ab6d8747bc2a5ead49e7610f137c72a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68a987750a2533a03e7839b146394fd595510481b7873cf7efc469a5f2178e2d
[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" "68a987750a2533a03e7839b146394fd595510481b7873cf7efc469a5f2178e2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling disassembler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/chip8/cpu.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::rand::prelude::*`
[INFO] [stdout]  --> src/chip8/cpu.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]   --> src/chip8/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::result;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memory`
[INFO] [stdout]    --> src/chip8/cpu.rs:193:26
[INFO] [stdout]     |
[INFO] [stdout] 193 |     fn disp_clear(&self, memory: & mut Memory) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_y`
[INFO] [stdout]    --> src/chip8/cpu.rs:292:48
[INFO] [stdout]     |
[INFO] [stdout] 292 |     fn bit_right_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stdout]     |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_y`
[INFO] [stdout]    --> src/chip8/cpu.rs:309:47
[INFO] [stdout]     |
[INFO] [stdout] 309 |     fn bit_left_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stdout]     |                                               ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CHIP8_V0_REGISTER`
[INFO] [stdout]   --> src/chip8/cpu.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const CHIP8_V0_REGISTER:        usize   = 0x0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `draw_flag`
[INFO] [stdout]  --> src/chip8/graphics.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     draw_flag: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mem_size`
[INFO] [stdout]   --> src/chip8/memory.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn mem_size(& self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Keypad`
[INFO] [stdout]  --> src/chip8/keypad.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Keypad {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mem`
[INFO] [stdout]   --> src/chip8/mod.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn get_mem(&self, addr: u16) -> u8 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         chip.emulate_cycle();
[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: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.57s
[INFO] running `Command { std: "docker" "inspect" "68a987750a2533a03e7839b146394fd595510481b7873cf7efc469a5f2178e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68a987750a2533a03e7839b146394fd595510481b7873cf7efc469a5f2178e2d", kill_on_drop: false }`
[INFO] [stdout] 68a987750a2533a03e7839b146394fd595510481b7873cf7efc469a5f2178e2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--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] 150a61a9e61e8a4ef9f7e81f83fac157216072de60fe2dda1860862db4af1b61
[INFO] running `Command { std: "docker" "start" "-a" "150a61a9e61e8a4ef9f7e81f83fac157216072de60fe2dda1860862db4af1b61", kill_on_drop: false }`
[INFO] [stderr]    Compiling disassembler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/chip8/cpu.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::rand::prelude::*`
[INFO] [stdout]  --> src/chip8/cpu.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]   --> src/chip8/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::result;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memory`
[INFO] [stdout]    --> src/chip8/cpu.rs:193:26
[INFO] [stdout]     |
[INFO] [stdout] 193 |     fn disp_clear(&self, memory: & mut Memory) {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_y`
[INFO] [stdout]    --> src/chip8/cpu.rs:292:48
[INFO] [stdout]     |
[INFO] [stdout] 292 |     fn bit_right_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stdout]     |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_y`
[INFO] [stdout]    --> src/chip8/cpu.rs:309:47
[INFO] [stdout]     |
[INFO] [stdout] 309 |     fn bit_left_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stdout]     |                                               ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CHIP8_V0_REGISTER`
[INFO] [stdout]   --> src/chip8/cpu.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const CHIP8_V0_REGISTER:        usize   = 0x0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `draw_flag`
[INFO] [stdout]  --> src/chip8/graphics.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     draw_flag: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mem_size`
[INFO] [stdout]   --> src/chip8/memory.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn mem_size(& self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Keypad`
[INFO] [stdout]  --> src/chip8/keypad.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Keypad {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mem`
[INFO] [stdout]   --> src/chip8/mod.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn get_mem(&self, addr: u16) -> u8 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         chip.emulate_cycle();
[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: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "150a61a9e61e8a4ef9f7e81f83fac157216072de60fe2dda1860862db4af1b61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "150a61a9e61e8a4ef9f7e81f83fac157216072de60fe2dda1860862db4af1b61", kill_on_drop: false }`
[INFO] [stdout] 150a61a9e61e8a4ef9f7e81f83fac157216072de60fe2dda1860862db4af1b61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d4ad0d16d8e7a78a5bb02820113fe6d0947c88417152cf0973fe6556b4802f68
[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" "d4ad0d16d8e7a78a5bb02820113fe6d0947c88417152cf0973fe6556b4802f68", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]  --> src/chip8/cpu.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::result;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::rand::prelude::*`
[INFO] [stderr]  --> src/chip8/cpu.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use self::rand::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]   --> src/chip8/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::result;
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `memory`
[INFO] [stderr]    --> src/chip8/cpu.rs:193:26
[INFO] [stderr]     |
[INFO] [stderr] 193 |     fn disp_clear(&self, memory: & mut Memory) {
[INFO] [stderr]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r_y`
[INFO] [stderr]    --> src/chip8/cpu.rs:292:48
[INFO] [stderr]     |
[INFO] [stderr] 292 |     fn bit_right_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stderr]     |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r_y`
[INFO] [stderr]    --> src/chip8/cpu.rs:309:47
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn bit_left_shift(& mut self, r_x: usize, r_y: usize) {
[INFO] [stderr]     |                                               ^^^ help: if this is intentional, prefix it with an underscore: `_r_y`
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `CHIP8_V0_REGISTER`
[INFO] [stderr]   --> src/chip8/cpu.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | const CHIP8_V0_REGISTER:        usize   = 0x0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `draw_flag`
[INFO] [stderr]  --> src/chip8/graphics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     draw_flag: bool,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mem_size`
[INFO] [stderr]   --> src/chip8/memory.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn mem_size(& self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Keypad`
[INFO] [stderr]  --> src/chip8/keypad.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Keypad {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mem`
[INFO] [stderr]   --> src/chip8/mod.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn get_mem(&self, addr: u16) -> u8 {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         chip.emulate_cycle();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/disassembler-9e24a0014b32c18c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d4ad0d16d8e7a78a5bb02820113fe6d0947c88417152cf0973fe6556b4802f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4ad0d16d8e7a78a5bb02820113fe6d0947c88417152cf0973fe6556b4802f68", kill_on_drop: false }`
[INFO] [stdout] d4ad0d16d8e7a78a5bb02820113fe6d0947c88417152cf0973fe6556b4802f68