[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 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDomParfitt%2Fchip-8" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[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-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DomParfitt/chip-8 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DomParfitt/chip-8 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6de794aed529cf3717cdcf81ada1b700cb32acb3361f04f5218025035417854d
[INFO] running `Command { std: "docker" "start" "-a" "6de794aed529cf3717cdcf81ada1b700cb32acb3361f04f5218025035417854d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6de794aed529cf3717cdcf81ada1b700cb32acb3361f04f5218025035417854d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6de794aed529cf3717cdcf81ada1b700cb32acb3361f04f5218025035417854d", kill_on_drop: false }`
[INFO] [stdout] 6de794aed529cf3717cdcf81ada1b700cb32acb3361f04f5218025035417854d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd155588e4b30c35299fc7690838137f85da70718c4c7d30975b928c83164d27
[INFO] running `Command { std: "docker" "start" "-a" "bd155588e4b30c35299fc7690838137f85da70718c4c7d30975b928c83164d27", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling libc v0.2.41
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[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling byteorder v1.2.3
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[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling token_store v0.1.2
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[INFO] [stderr]    Compiling rayon-core v1.4.0
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[INFO] [stderr]    Compiling rusttype v0.4.3
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[INFO] [stderr]    Compiling read_color v1.0.0
[INFO] [stderr]    Compiling interpolation v0.1.0
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[INFO] [stderr]    Compiling rand_core v0.2.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling rand v0.5.0
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[INFO] [stderr]    Compiling serde_derive v1.0.64
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling image v0.19.0
[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 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-gfx_texture v0.32.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.51.0
[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: variable `high` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_high` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `low` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:11:17
[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]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[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: 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]   = 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: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: this arithmetic operation will overflow
[INFO] [stdout]   --> src/assembler/mod.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[INFO] [stdout]    |                         ^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(arithmetic_overflow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this arithmetic operation will overflow
[INFO] [stdout]   --> src/assembler/mod.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[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: unused variable: `now`
[INFO] [stdout]   --> src/main.rs:24:13
[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] 
[INFO] [stdout] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:25:13
[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 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] 
[INFO] [stdout] warning: function `assemble` is never used
[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 `assemble_opcode` is never used
[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 `get_register_number` is never used
[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: methods `load_program` and `print_display` are never used
[INFO] [stdout]   --> src/chip8/mod.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Chip8 {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn load_program(&mut self, program: Vec<u8>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     pub fn print_display(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `high_nibble_from_byte` and `low_nibble_from_byte` are never used
[INFO] [stdout]    --> src/chip8/mod.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 125 | impl Chip8 {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `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: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let _ = io::stdin().read_line(&mut input);
[INFO] [stdout]    |             +++++++
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.19s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8, syn v0.14.1
[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" "bd155588e4b30c35299fc7690838137f85da70718c4c7d30975b928c83164d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd155588e4b30c35299fc7690838137f85da70718c4c7d30975b928c83164d27", kill_on_drop: false }`
[INFO] [stdout] bd155588e4b30c35299fc7690838137f85da70718c4c7d30975b928c83164d27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9adb4e6ff3b3e4fd47028f2fcb209e512e704d46ea88e3b2e33a2a4aefab458f
[INFO] running `Command { std: "docker" "start" "-a" "9adb4e6ff3b3e4fd47028f2fcb209e512e704d46ea88e3b2e33a2a4aefab458f", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[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: variable `high` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut high: u8;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_high` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `low` is assigned to, but never used
[INFO] [stdout]   --> src/assembler/mod.rs:11:17
[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]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[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: 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]   = 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: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: this arithmetic operation will overflow
[INFO] [stdout]   --> src/assembler/mod.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[INFO] [stdout]    |                         ^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(arithmetic_overflow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this arithmetic operation will overflow
[INFO] [stdout]   --> src/assembler/mod.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[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: unused variable: `now`
[INFO] [stdout]   --> src/main.rs:24:13
[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] 
[INFO] [stdout] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:25:13
[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 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] 
[INFO] [stdout] warning: function `assemble` is never used
[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 `assemble_opcode` is never used
[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 `get_register_number` is never used
[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: function `test` is never used
[INFO] [stdout]  --> src/assembler/tests.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_display` is never used
[INFO] [stdout]   --> src/chip8/mod.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Chip8 {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     pub fn print_display(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `high_nibble_from_byte` and `low_nibble_from_byte` are never used
[INFO] [stdout]    --> src/chip8/mod.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 125 | impl Chip8 {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `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: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let _ = io::stdin().read_line(&mut input);
[INFO] [stdout]    |             +++++++
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8, syn v0.14.1
[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" "9adb4e6ff3b3e4fd47028f2fcb209e512e704d46ea88e3b2e33a2a4aefab458f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9adb4e6ff3b3e4fd47028f2fcb209e512e704d46ea88e3b2e33a2a4aefab458f", kill_on_drop: false }`
[INFO] [stdout] 9adb4e6ff3b3e4fd47028f2fcb209e512e704d46ea88e3b2e33a2a4aefab458f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 08f61fc09c90aeeb1547527332c0663c7fb2e74c3dc93d734f64e2127ac6320f
[INFO] running `Command { std: "docker" "start" "-a" "08f61fc09c90aeeb1547527332c0663c7fb2e74c3dc93d734f64e2127ac6320f", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[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: variable `high` is assigned to, but never used
[INFO] [stderr]   --> src/assembler/mod.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut high: u8;
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_high` instead
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `low` is assigned to, but never used
[INFO] [stderr]   --> src/assembler/mod.rs:11:17
[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]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[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: 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]   = 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: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: this arithmetic operation will overflow
[INFO] [stderr]   --> src/assembler/mod.rs:17:25
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 high =  (0x8 << 8) | get_register_number(x);
[INFO] [stderr]    |                         ^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(arithmetic_overflow)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: this arithmetic operation will overflow
[INFO] [stderr]   --> src/assembler/mod.rs:20:23
[INFO] [stderr]    |
[INFO] [stderr] 20 |                 low = (get_register_number(y) << 8) | 0x2;
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to shift left by `8_i32`, which would overflow
[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: unused variable: `now`
[INFO] [stderr]   --> src/main.rs:24:13
[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] warning: variable `cycle_count` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:25:13
[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 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] warning: function `assemble` is never used
[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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `assemble_opcode` is never used
[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 `get_register_number` is never used
[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: function `test` is never used
[INFO] [stderr]  --> src/assembler/tests.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn test() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `print_display` is never used
[INFO] [stderr]   --> src/chip8/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl Chip8 {
[INFO] [stderr]    | ---------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 92 |     pub fn print_display(&self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated functions `high_nibble_from_byte` and `low_nibble_from_byte` are never used
[INFO] [stderr]    --> src/chip8/mod.rs:402:8
[INFO] [stderr]     |
[INFO] [stderr] 125 | impl Chip8 {
[INFO] [stderr]     | ---------- associated functions in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 402 |     fn high_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 406 |     fn low_nibble_from_byte(byte: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `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: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 31 |             let _ = io::stdin().read_line(&mut input);
[INFO] [stderr]    |             +++++++
[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: `emu` (bin "emu" test) generated 34 warnings (run `cargo fix --bin "emu" --tests` to apply 5 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8, syn v0.14.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/emu-37bc4c61a324c39d)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test chip8::tests::test_call ... ok
[INFO] [stdout] test chip8::tests::test_call_and_return ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "08f61fc09c90aeeb1547527332c0663c7fb2e74c3dc93d734f64e2127ac6320f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08f61fc09c90aeeb1547527332c0663c7fb2e74c3dc93d734f64e2127ac6320f", kill_on_drop: false }`
[INFO] [stdout] 08f61fc09c90aeeb1547527332c0663c7fb2e74c3dc93d734f64e2127ac6320f
