[INFO] cloning repository https://github.com/etscrivner/neoboy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/etscrivner/neoboy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetscrivner%2Fneoboy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetscrivner%2Fneoboy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84dd459edfb6d01f4d1fa9f0066e1e1b55d1d9cc
[INFO] checking etscrivner/neoboy against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fetscrivner%2Fneoboy" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/etscrivner/neoboy on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/etscrivner/neoboy
[INFO] finished tweaking git repo https://github.com/etscrivner/neoboy
[INFO] tweaked toml for git repo https://github.com/etscrivner/neoboy written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/etscrivner/neoboy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 012e7c19e67fe17e031af5025ef78c0fbb95189e8abcd6f59d55d86c81de9a2e
[INFO] running `Command { std: "docker" "start" "-a" "012e7c19e67fe17e031af5025ef78c0fbb95189e8abcd6f59d55d86c81de9a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "012e7c19e67fe17e031af5025ef78c0fbb95189e8abcd6f59d55d86c81de9a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "012e7c19e67fe17e031af5025ef78c0fbb95189e8abcd6f59d55d86c81de9a2e", kill_on_drop: false }`
[INFO] [stdout] 012e7c19e67fe17e031af5025ef78c0fbb95189e8abcd6f59d55d86c81de9a2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fff8e4f33a32c6793f1e0bb33382789f94e7aef35931054ef5cf72f70feb7b0
[INFO] running `Command { std: "docker" "start" "-a" "7fff8e4f33a32c6793f1e0bb33382789f94e7aef35931054ef5cf72f70feb7b0", kill_on_drop: false }`
[INFO] [stderr]     Checking gameboy v0.1.0 (/opt/rustwide/workdir/gameboy)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/memory.rs:32:24
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub cartridge: Box<Cartridge>
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/memory.rs:39:31
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn new(cartridge: Box<Cartridge>) -> Self {
[INFO] [stdout]    |                               ^^^^^^^^^ help: use `dyn`: `dyn Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/memory.rs:32:24
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub cartridge: Box<Cartridge>
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/rom.rs:91:47
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn into_cartridge(self) -> Option<Box<cartridge::Cartridge>> {
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn cartridge::Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/memory.rs:39:31
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn new(cartridge: Box<Cartridge>) -> Self {
[INFO] [stdout]    |                               ^^^^^^^^^ help: use `dyn`: `dyn Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> gameboy/src/rom.rs:91:47
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn into_cartridge(self) -> Option<Box<cartridge::Cartridge>> {
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn cartridge::Cartridge`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `f`
[INFO] [stdout]  --> gameboy/src/registers.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     f: u8,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `gameboy_type`
[INFO] [stdout]   --> gameboy/src/lib.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     gameboy_type: GameboyType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `f`
[INFO] [stdout]  --> gameboy/src/registers.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     f: u8,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `gameboy_type`
[INFO] [stdout]   --> gameboy/src/lib.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     gameboy_type: GameboyType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking neoboy v0.1.0 (/opt/rustwide/workdir/neoboy)
[INFO] [stdout] warning: unused import: `gameboy::cpu::*`
[INFO] [stdout]  --> gameboy/tests/cpu_tests.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use gameboy::cpu::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> gameboy/tests/memory_tests.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let cartridge: Box<Cartridge> = Box::new(RomOnly::new(vec![0x12; 0x10000]));
[INFO] [stdout]   |                        ^^^^^^^^^ help: use `dyn`: `dyn Cartridge`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:41:60
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut opcode_table: HashMap<&str, Vec<(u8, &str, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:41:60
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut opcode_table: HashMap<&str, Vec<(u8, &str, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:41:61
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut opcode_table: HashMap<&str, Vec<(u8, &str, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                             ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:41:61
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut opcode_table: HashMap<&str, Vec<(u8, &str, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                             ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:43:44
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:43:45
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                             ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:43:65
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:43:66
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:43:44
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:43:45
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                             ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> neoboy/src/main.rs:43:65
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> neoboy/src/main.rs:43:66
[INFO] [stdout]    |
[INFO] [stdout] 43 |             &str, Vec<(u8, &str, &str, Box<(Fn(u8) -> u8)>, Box<(Fn(u8) -> u8)>)>> = HashMap::new();
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(u8) -> u8`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `gameboy::cpu::*`
[INFO] [stdout]  --> gameboy/tests/operations_tests.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use gameboy::cpu::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expected_value`
[INFO] [stdout]  --> neoboy/src/main.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn expected_value(regname: &str) -> 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: `opcode_tests`
[INFO] [stdout]   --> neoboy/src/main.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn opcode_tests() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expected_value`
[INFO] [stdout]  --> neoboy/src/main.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn expected_value(regname: &str) -> 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: `opcode_tests`
[INFO] [stdout]   --> neoboy/src/main.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn opcode_tests() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `Command { std: "docker" "inspect" "7fff8e4f33a32c6793f1e0bb33382789f94e7aef35931054ef5cf72f70feb7b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fff8e4f33a32c6793f1e0bb33382789f94e7aef35931054ef5cf72f70feb7b0", kill_on_drop: false }`
[INFO] [stdout] 7fff8e4f33a32c6793f1e0bb33382789f94e7aef35931054ef5cf72f70feb7b0