[INFO] cloning repository https://github.com/DomParfitt/chip-8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DomParfitt/chip-8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDomParfitt%2Fchip-8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDomParfitt%2Fchip-8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3d5eb2d9969b9621efbcd7efbd3956c473e75861
[INFO] testing DomParfitt/chip-8 against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDomParfitt%2Fchip-8" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DomParfitt/chip-8 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DomParfitt/chip-8
[INFO] finished tweaking git repo https://github.com/DomParfitt/chip-8
[INFO] tweaked toml for git repo https://github.com/DomParfitt/chip-8 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/DomParfitt/chip-8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11931653c31ea26d7979876cbfe15165e70ee7cc25104491a06b7a74465bce9b
[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" "11931653c31ea26d7979876cbfe15165e70ee7cc25104491a06b7a74465bce9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11931653c31ea26d7979876cbfe15165e70ee7cc25104491a06b7a74465bce9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11931653c31ea26d7979876cbfe15165e70ee7cc25104491a06b7a74465bce9b", kill_on_drop: false }`
[INFO] [stdout] 11931653c31ea26d7979876cbfe15165e70ee7cc25104491a06b7a74465bce9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03fe01c0b695e73c18fa304ea3a1f33e6da060fbfdcdee8a54831a3c75d25f9b
[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" "03fe01c0b695e73c18fa304ea3a1f33e6da060fbfdcdee8a54831a3c75d25f9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling serde v1.0.64
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling shader_version v0.3.0
[INFO] [stderr]    Compiling piston-texture v0.6.0
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.4
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling stb_truetype v0.2.2
[INFO] [stderr]    Compiling vecmath v0.3.1
[INFO] [stderr]    Compiling gif v0.10.0
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.14.1
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling x11-dl v2.17.5
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling tempfile v3.0.2
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling glutin v0.14.0
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling serde_derive v1.0.64
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling winit v0.12.0
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_device_gl v0.15.3
[INFO] [stderr]    Compiling piston-gfx_texture v0.32.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.51.0
[INFO] [stderr]    Compiling pistoncore-input v0.21.0
[INFO] [stderr]    Compiling pistoncore-window v0.32.0
[INFO] [stderr]    Compiling pistoncore-event_loop v0.37.0
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.47.0
[INFO] [stderr]    Compiling piston v0.37.0
[INFO] [stderr]    Compiling piston_window v0.80.0
[INFO] [stderr]    Compiling emu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/main.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut now = Instant::now();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut cycle_count = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_cycle_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `high` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_high` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `low` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut low: u8;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_low` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[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: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 high = 0x00;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 low = 0xE0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 high = 0x00;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 low = 0xEE;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 high = (0x3 << 4) | get_register_number(register_token);
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |                     low = get_register_number(tokens[i]) << 4;
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |                     low = u8::from_str_radix(tokens[i], 16).unwrap();
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |             _ => {high = 0x00;
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 low = 0xE0;}//panic!("Unrecognised token."),
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/assembler/mod.rs:70:34
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stdout]    |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let high_byte = opcode.high_byte;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:442:13
[INFO] [stdout]     |
[INFO] [stdout] 442 |         let high_byte = opcode.high_byte;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut now = Instant::now();
[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/assembler/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut assembled_program: Vec<u8> = Vec::new();
[INFO] [stdout]   |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/assembler/mod.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/assembler/mod.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut low: u8;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `assemble`
[INFO] [stdout]  --> src/assembler/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn assemble(program: String) -> Vec<u8> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `assemble_opcode`
[INFO] [stdout]   --> src/assembler/mod.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_register_number`
[INFO] [stdout]   --> src/assembler/mod.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn get_register_number(token: &str) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load_program`
[INFO] [stdout]   --> src/chip8/mod.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn load_program(&mut self, program: Vec<u8>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_display`
[INFO] [stdout]   --> src/chip8/mod.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn print_display(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `high_nibble_from_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `low_nibble_from_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:406:8
[INFO] [stdout]     |
[INFO] [stdout] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             io::stdin().read_line(&mut input);
[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: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/chip8/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub V: [u8; 16],
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/chip8/mod.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub I: u16,
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 33 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 19s
[INFO] running `Command { std: "docker" "inspect" "03fe01c0b695e73c18fa304ea3a1f33e6da060fbfdcdee8a54831a3c75d25f9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03fe01c0b695e73c18fa304ea3a1f33e6da060fbfdcdee8a54831a3c75d25f9b", kill_on_drop: false }`
[INFO] [stdout] 03fe01c0b695e73c18fa304ea3a1f33e6da060fbfdcdee8a54831a3c75d25f9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70ca90e070b4e1ac417177be7a61167317d2b8806f4eb71e8f073a44f2b72c38
[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" "70ca90e070b4e1ac417177be7a61167317d2b8806f4eb71e8f073a44f2b72c38", kill_on_drop: false }`
[INFO] [stderr]    Compiling emu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/main.rs:8:17
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut now = Instant::now();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut cycle_count = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_cycle_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `high` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_high` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `low` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut low: u8;
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_low` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[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: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 high = 0x00;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 low = 0xE0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 high = 0x00;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 low = 0xEE;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 high = (0x3 << 4) | get_register_number(register_token);
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |                     low = get_register_number(tokens[i]) << 4;
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |                     low = u8::from_str_radix(tokens[i], 16).unwrap();
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `high` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |             _ => {high = 0x00;
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `low` is never read
[INFO] [stdout]   --> src/assembler/mod.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 low = 0xE0;}//panic!("Unrecognised token."),
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/assembler/mod.rs:70:34
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stdout]    |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let high_byte = opcode.high_byte;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `high_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:442:13
[INFO] [stdout]     |
[INFO] [stdout] 442 |         let high_byte = opcode.high_byte;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut now = Instant::now();
[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/assembler/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut assembled_program: Vec<u8> = Vec::new();
[INFO] [stdout]   |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/assembler/mod.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/assembler/mod.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let mut low: u8;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/assembler/tests.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `assemble`
[INFO] [stdout]  --> src/assembler/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn assemble(program: String) -> Vec<u8> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `assemble_opcode`
[INFO] [stdout]   --> src/assembler/mod.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_register_number`
[INFO] [stdout]   --> src/assembler/mod.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn get_register_number(token: &str) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_display`
[INFO] [stdout]   --> src/chip8/mod.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn print_display(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `high_nibble_from_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `low_nibble_from_byte`
[INFO] [stdout]    --> src/chip8/mod.rs:406:8
[INFO] [stdout]     |
[INFO] [stdout] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             io::stdin().read_line(&mut input);
[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: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/chip8/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub V: [u8; 16],
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/chip8/mod.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub I: u16,
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 33 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.70s
[INFO] running `Command { std: "docker" "inspect" "70ca90e070b4e1ac417177be7a61167317d2b8806f4eb71e8f073a44f2b72c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70ca90e070b4e1ac417177be7a61167317d2b8806f4eb71e8f073a44f2b72c38", kill_on_drop: false }`
[INFO] [stdout] 70ca90e070b4e1ac417177be7a61167317d2b8806f4eb71e8f073a44f2b72c38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 54ed001361c8f5759ee2674cc7b09eaaf807ba5a573d23ea6f7bb2c76f1f1d23
[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" "54ed001361c8f5759ee2674cc7b09eaaf807ba5a573d23ea6f7bb2c76f1f1d23", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/main.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::time::{Duration, Instant};
[INFO] [stderr]   |                 ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `now`
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut now = Instant::now();
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let mut cycle_count = 0;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_cycle_count` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `high` is assigned to, but never used
[INFO] [stderr]   --> src/assembler/mod.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut high: u8;
[INFO] [stderr]    |             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_high` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `low` is assigned to, but never used
[INFO] [stderr]   --> src/assembler/mod.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let mut low: u8;
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_low` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `high` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `high` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:24:17
[INFO] [stderr]    |
[INFO] [stderr] 24 |                 high = 0x00;
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |                 low = 0xE0;
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `high` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 high = 0x00;
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:35:17
[INFO] [stderr]    |
[INFO] [stderr] 35 |                 low = 0xEE;
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `high` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |                 high = (0x3 << 4) | get_register_number(register_token);
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 |                     low = get_register_number(tokens[i]) << 4;
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |                     low = u8::from_str_radix(tokens[i], 16).unwrap();
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `high` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:58:19
[INFO] [stderr]    |
[INFO] [stderr] 58 |             _ => {high = 0x00;
[INFO] [stderr]    |                   ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `low` is never read
[INFO] [stderr]   --> src/assembler/mod.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |                 low = 0xE0;}//panic!("Unrecognised token."),
[INFO] [stderr]    |                 ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operand`
[INFO] [stderr]   --> src/assembler/mod.rs:70:34
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stderr]    |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `high_byte`
[INFO] [stderr]    --> src/chip8/mod.rs:145:13
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let high_byte = opcode.high_byte;
[INFO] [stderr]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `high_byte`
[INFO] [stderr]    --> src/chip8/mod.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 |         let high_byte = opcode.high_byte;
[INFO] [stderr]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_high_byte`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut now = Instant::now();
[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: variable does not need to be mutable
[INFO] [stderr]  --> src/assembler/mod.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut assembled_program: Vec<u8> = Vec::new();
[INFO] [stderr]   |         ----^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/assembler/mod.rs:10:13
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut high: u8;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/assembler/mod.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let mut low: u8;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/assembler/tests.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn test() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `assemble`
[INFO] [stderr]  --> src/assembler/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn assemble(program: String) -> Vec<u8> {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `assemble_opcode`
[INFO] [stderr]   --> src/assembler/mod.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn assemble_opcode(opcode: &str, operand: &str) -> (u8, u8) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_register_number`
[INFO] [stderr]   --> src/assembler/mod.rs:80:4
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn get_register_number(token: &str) -> u8 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_display`
[INFO] [stderr]   --> src/chip8/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub fn print_display(&self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `high_nibble_from_byte`
[INFO] [stderr]    --> src/chip8/mod.rs:402:8
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `low_nibble_from_byte`
[INFO] [stderr]    --> src/chip8/mod.rs:406:8
[INFO] [stderr]     |
[INFO] [stderr] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |             io::stdin().read_line(&mut input);
[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: structure field `V` should have a snake case name
[INFO] [stderr]   --> src/chip8/mod.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub V: [u8; 16],
[INFO] [stderr]    |         ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `I` should have a snake case name
[INFO] [stderr]   --> src/chip8/mod.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub I: u16,
[INFO] [stderr]    |         ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stderr] 
[INFO] [stderr] warning: 33 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/emu-dd9eb152d6f67f7f
[INFO] [stdout] running 2 tests
[INFO] [stdout] test chip8::tests::test_call_and_return ... ok
[INFO] [stdout] test chip8::tests::test_call ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "54ed001361c8f5759ee2674cc7b09eaaf807ba5a573d23ea6f7bb2c76f1f1d23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54ed001361c8f5759ee2674cc7b09eaaf807ba5a573d23ea6f7bb2c76f1f1d23", kill_on_drop: false }`
[INFO] [stdout] 54ed001361c8f5759ee2674cc7b09eaaf807ba5a573d23ea6f7bb2c76f1f1d23
