[INFO] cloning repository https://github.com/tylanphear/gbrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tylanphear/gbrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftylanphear%2Fgbrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftylanphear%2Fgbrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 585994d29742d7ebb403434ebee7ff369789c031
[INFO] checking tylanphear/gbrust against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftylanphear%2Fgbrust" "/workspace/builds/worker-30/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-30/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tylanphear/gbrust 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/tylanphear/gbrust
[INFO] finished tweaking git repo https://github.com/tylanphear/gbrust
[INFO] tweaked toml for git repo https://github.com/tylanphear/gbrust written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate git repo https://github.com/tylanphear/gbrust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] 032125e204415b04a0a044241c0d2c208003f7e1704d3ff8e77d7630bf94e983
[INFO] running `Command { std: "docker" "start" "-a" "032125e204415b04a0a044241c0d2c208003f7e1704d3ff8e77d7630bf94e983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "032125e204415b04a0a044241c0d2c208003f7e1704d3ff8e77d7630bf94e983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "032125e204415b04a0a044241c0d2c208003f7e1704d3ff8e77d7630bf94e983", kill_on_drop: false }`
[INFO] [stdout] 032125e204415b04a0a044241c0d2c208003f7e1704d3ff8e77d7630bf94e983
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] bd6de034656db3370f6c20043e75e6973f26e784500acc8e6a5b877ef693d84f
[INFO] running `Command { std: "docker" "start" "-a" "bd6de034656db3370f6c20043e75e6973f26e784500acc8e6a5b877ef693d84f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking gbrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::u16::MAX as MAX16`
[INFO] [stdout]    --> src/cpu.rs:379:13
[INFO] [stdout]     |
[INFO] [stdout] 379 |         use std::u16::MAX as MAX16;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CPU`
[INFO] [stdout]  --> src/cpu.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct CPU {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/cpu.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tick`
[INFO] [stdout]   --> src/cpu.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn tick(&mut self, time: u8) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_clock`
[INFO] [stdout]   --> src/cpu.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn update_clock(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `and`
[INFO] [stdout]   --> src/cpu.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn and(&mut self, register: R8) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `or`
[INFO] [stdout]   --> src/cpu.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn or(&mut self, register: R8) {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch8`
[INFO] [stdout]   --> src/cpu.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn fetch8(&self, register: R8) -> u8 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fetch16`
[INFO] [stdout]   --> src/cpu.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn fetch16(&self, register: R16) -> u16 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set8`
[INFO] [stdout]   --> src/cpu.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn set8(&mut self, register: R8, value: u8) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set16`
[INFO] [stdout]    --> src/cpu.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn set16(&mut self, register: R16, value: u16) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load`
[INFO] [stdout]    --> src/cpu.rs:129:12
[INFO] [stdout]     |
[INFO] [stdout] 129 |     pub fn load(&mut self, to: R8, from: R8) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add8`
[INFO] [stdout]    --> src/cpu.rs:138:12
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn add8(&mut self, fst: R8, snd: R8) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Clock`
[INFO] [stdout]    --> src/cpu.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 | struct Clock {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Flags`
[INFO] [stdout]    --> src/cpu.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | struct Flags {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `u8s_to_u16`
[INFO] [stdout]    --> src/cpu.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn u8s_to_u16(high: u8, low: u8) -> u16 {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `u16_to_u8s`
[INFO] [stdout]    --> src/cpu.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn u16_to_u8s(wbyte: u16) -> (u8, u8) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `A`
[INFO] [stdout]    --> src/cpu.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 175 |     A,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B`
[INFO] [stdout]    --> src/cpu.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |     B,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `C`
[INFO] [stdout]    --> src/cpu.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     C,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `D`
[INFO] [stdout]    --> src/cpu.rs:178:5
[INFO] [stdout]     |
[INFO] [stdout] 178 |     D,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `E`
[INFO] [stdout]    --> src/cpu.rs:179:5
[INFO] [stdout]     |
[INFO] [stdout] 179 |     E,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `H`
[INFO] [stdout]    --> src/cpu.rs:180:5
[INFO] [stdout]     |
[INFO] [stdout] 180 |     H,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `L`
[INFO] [stdout]    --> src/cpu.rs:181:5
[INFO] [stdout]     |
[INFO] [stdout] 181 |     L,
[INFO] [stdout]     |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CONST`
[INFO] [stdout]    --> src/cpu.rs:182:5
[INFO] [stdout]     |
[INFO] [stdout] 182 |     CONST(u8)
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `registers`
[INFO] [stdout]    --> src/cpu.rs:187:12
[INFO] [stdout]     |
[INFO] [stdout] 187 |     pub fn registers() -> Iter<'static, R8> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `REGISTERS`
[INFO] [stdout]    --> src/cpu.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |         static REGISTERS: [R8; 7] = [R8::A, R8::B, R8::C, R8::D, R8::E, R8::H, R8::L];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PC`
[INFO] [stdout]    --> src/cpu.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 195 |     PC,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SP`
[INFO] [stdout]    --> src/cpu.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     SP,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BC`
[INFO] [stdout]    --> src/cpu.rs:197:5
[INFO] [stdout]     |
[INFO] [stdout] 197 |     BC,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DE`
[INFO] [stdout]    --> src/cpu.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     DE,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `HL`
[INFO] [stdout]    --> src/cpu.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     HL,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CONST`
[INFO] [stdout]    --> src/cpu.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     CONST(u16)
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `registers`
[INFO] [stdout]    --> src/cpu.rs:204:12
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn registers() -> Iter<'static, R16> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `REGISTERS`
[INFO] [stdout]    --> src/cpu.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |         static REGISTERS: [R16; 5] = [R16::PC, R16::SP, R16::BC, R16::DE, R16::HL];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `detect_half_carry`
[INFO] [stdout]    --> src/cpu.rs:210:4
[INFO] [stdout]     |
[INFO] [stdout] 210 | fn detect_half_carry(fst: u8, snd: u8) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/cpu.rs:189:19
[INFO] [stdout]     |
[INFO] [stdout] 189 |         REGISTERS.into_iter()
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 189 |         REGISTERS.iter()
[INFO] [stdout]     |                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 189 |         IntoIterator::into_iter(REGISTERS)
[INFO] [stdout]     |         ++++++++++++++++++++++++         ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/cpu.rs:206:19
[INFO] [stdout]     |
[INFO] [stdout] 206 |         REGISTERS.into_iter()
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 206 |         REGISTERS.iter()
[INFO] [stdout]     |                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 206 |         IntoIterator::into_iter(REGISTERS)
[INFO] [stdout]     |         ++++++++++++++++++++++++         ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/cpu.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         &mut self.set8(R8::A, res);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let _ = &mut self.set8(R8::A, res);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `and`
[INFO] [stdout]   --> src/cpu.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn and(&mut self, register: R8) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `or`
[INFO] [stdout]   --> src/cpu.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn or(&mut self, register: R8) {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CONST`
[INFO] [stdout]    --> src/cpu.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     CONST(u16)
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/cpu.rs:189:19
[INFO] [stdout]     |
[INFO] [stdout] 189 |         REGISTERS.into_iter()
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 189 |         REGISTERS.iter()
[INFO] [stdout]     |                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 189 |         IntoIterator::into_iter(REGISTERS)
[INFO] [stdout]     |         ++++++++++++++++++++++++         ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/cpu.rs:206:19
[INFO] [stdout]     |
[INFO] [stdout] 206 |         REGISTERS.into_iter()
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 206 |         REGISTERS.iter()
[INFO] [stdout]     |                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 206 |         IntoIterator::into_iter(REGISTERS)
[INFO] [stdout]     |         ++++++++++++++++++++++++         ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/cpu.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         &mut self.set8(R8::A, res);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let _ = &mut self.set8(R8::A, res);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "bd6de034656db3370f6c20043e75e6973f26e784500acc8e6a5b877ef693d84f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6de034656db3370f6c20043e75e6973f26e784500acc8e6a5b877ef693d84f", kill_on_drop: false }`
[INFO] [stdout] bd6de034656db3370f6c20043e75e6973f26e784500acc8e6a5b877ef693d84f