[INFO] cloning repository https://github.com/jonathangold/rustboy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonathangold/rustboy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonathangold%2Frustboy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonathangold%2Frustboy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3eaca0642297d36975ff771759fe7b32b30b8e09
[INFO] checking jonathangold/rustboy against master#03c609abb6638f9d7f49f34326d4137d07f5cd61 for pr-155945
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonathangold%2Frustboy" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jonathangold/rustboy
[INFO] finished tweaking git repo https://github.com/jonathangold/rustboy
[INFO] tweaked toml for git repo https://github.com/jonathangold/rustboy written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jonathangold/rustboy on toolchain 03c609abb6638f9d7f49f34326d4137d07f5cd61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jonathangold/rustboy 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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded c_vec v1.0.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 68cec0c7e3385145acf33678e2beea18ecf9b2e01aca3e2e73917c5922c4afb1
[INFO] running `Command { std: "docker" "start" "-a" "68cec0c7e3385145acf33678e2beea18ecf9b2e01aca3e2e73917c5922c4afb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68cec0c7e3385145acf33678e2beea18ecf9b2e01aca3e2e73917c5922c4afb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68cec0c7e3385145acf33678e2beea18ecf9b2e01aca3e2e73917c5922c4afb1", kill_on_drop: false }`
[INFO] [stdout] 68cec0c7e3385145acf33678e2beea18ecf9b2e01aca3e2e73917c5922c4afb1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 577e0c4531c10348208e6d802d2858f205e7f90f90a3670b758d2908554a8863
[INFO] running `Command { std: "docker" "start" "-a" "577e0c4531c10348208e6d802d2858f205e7f90f90a3670b758d2908554a8863", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]    Compiling sdl2-sys v0.30.0
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking lazy_static v0.2.8
[INFO] [stderr]     Checking c_vec v1.0.12
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking sdl2 v0.30.0
[INFO] [stderr]     Checking rustboy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:36:19
[INFO] [stdout]    |
[INFO] [stdout] 36 |             0x0000...0x00FF => {BOOT_ROM[input as usize]}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |             0x0100...0x7FFF => {self.read_rom(input)}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:38:19
[INFO] [stdout]    |
[INFO] [stdout] 38 |             0x8000...0xFFFF => {self.contents[input as usize]}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std`
[INFO] [stdout]  --> src/cpu.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std;
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::pixels`
[INFO] [stdout]  --> src/display.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::sdl2::pixels;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::keyboard::Keycode`
[INFO] [stdout]  --> src/display.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use self::sdl2::keyboard::Keycode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::gfx::primitives::DrawRenderer`
[INFO] [stdout]  --> src/display.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::sdl2::gfx::primitives::DrawRenderer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/memory.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => {panic!("Unrecognized Address: {:#x}", input)}
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/memory.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |             0x0000...0x00FF => {BOOT_ROM[input as usize]}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 37 |             0x0100...0x7FFF => {self.read_rom(input)}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 38 |             0x8000...0xFFFF => {self.contents[input as usize]}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 39 |             _ => {panic!("Unrecognized Address: {:#x}", input)}
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `val` is never read
[INFO] [stdout]    --> src/cpu.rs:111:28
[INFO] [stdout]     |
[INFO] [stdout] 111 |             if $self.f.c { val += 1 }
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |             0x17 => { println!("{:?}", self); rln!(self, a); println!("{:?}", self); }
[INFO] [stdout]     |                                               ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `rln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/display.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let mut event_pump = sdl_context.event_pump().unwrap();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `write_de` is never used
[INFO] [stdout]    --> src/cpu.rs:652:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | impl Cpu {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 652 | fn write_de(&mut self, data:u16) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `canvas` is never read
[INFO] [stdout]   --> src/display.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Display {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 14 |     canvas: sdl2::render::Canvas<sdl2::video::Window>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]   --> src/display.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Display {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn update(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/cpu.rs:439:17
[INFO] [stdout]     |
[INFO] [stdout] 439 |                 self.a - self.h;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 439 |                 let _ = self.a - self.h;
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:36:19
[INFO] [stdout]    |
[INFO] [stdout] 36 |             0x0000...0x00FF => {BOOT_ROM[input as usize]}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |             0x0100...0x7FFF => {self.read_rom(input)}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/memory.rs:38:19
[INFO] [stdout]    |
[INFO] [stdout] 38 |             0x8000...0xFFFF => {self.contents[input as usize]}
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std`
[INFO] [stdout]  --> src/cpu.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std;
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::pixels`
[INFO] [stdout]  --> src/display.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::sdl2::pixels;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::keyboard::Keycode`
[INFO] [stdout]  --> src/display.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use self::sdl2::keyboard::Keycode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::sdl2::gfx::primitives::DrawRenderer`
[INFO] [stdout]  --> src/display.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::sdl2::gfx::primitives::DrawRenderer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/memory.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => {panic!("Unrecognized Address: {:#x}", input)}
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/memory.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |             0x0000...0x00FF => {BOOT_ROM[input as usize]}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 37 |             0x0100...0x7FFF => {self.read_rom(input)}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 38 |             0x8000...0xFFFF => {self.contents[input as usize]}
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 39 |             _ => {panic!("Unrecognized Address: {:#x}", input)}
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `val` is never read
[INFO] [stdout]    --> src/cpu.rs:111:28
[INFO] [stdout]     |
[INFO] [stdout] 111 |             if $self.f.c { val += 1 }
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |             0x17 => { println!("{:?}", self); rln!(self, a); println!("{:?}", self); }
[INFO] [stdout]     |                                               ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `rln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/display.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let mut event_pump = sdl_context.event_pump().unwrap();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `write_de` is never used
[INFO] [stdout]    --> src/cpu.rs:652:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | impl Cpu {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 652 | fn write_de(&mut self, data:u16) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `canvas` is never read
[INFO] [stdout]   --> src/display.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Display {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 14 |     canvas: sdl2::render::Canvas<sdl2::video::Window>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]   --> src/display.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Display {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn update(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/cpu.rs:439:17
[INFO] [stdout]     |
[INFO] [stdout] 439 |                 self.a - self.h;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 439 |                 let _ = self.a - self.h;
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.26s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.7.0
[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" "577e0c4531c10348208e6d802d2858f205e7f90f90a3670b758d2908554a8863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "577e0c4531c10348208e6d802d2858f205e7f90f90a3670b758d2908554a8863", kill_on_drop: false }`
[INFO] [stdout] 577e0c4531c10348208e6d802d2858f205e7f90f90a3670b758d2908554a8863
