[INFO] cloning repository https://github.com/PhilippGackstatter/rustychip
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PhilippGackstatter/rustychip" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Frustychip", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Frustychip'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c619b21e60da1a899c0a2db3dce72f2fb26356c
[INFO] checking PhilippGackstatter/rustychip against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Frustychip" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PhilippGackstatter/rustychip
[INFO] finished tweaking git repo https://github.com/PhilippGackstatter/rustychip
[INFO] tweaked toml for git repo https://github.com/PhilippGackstatter/rustychip written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PhilippGackstatter/rustychip on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/PhilippGackstatter/rustychip 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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: binary `rusty_chip` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /workspace/builds/worker-1-tc1/source/target/.../rusty_chip
[INFO] [stderr]    |                                                  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `rusty-chip`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:8:8
[INFO] [stderr]    |
[INFO] [stderr]  8 - name = "rusty_chip"
[INFO] [stderr]  8 + name = "rusty-chip"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `rusty-chip`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:9:19
[INFO] [stderr]    |
[INFO] [stderr]  9 ~ version = "0.1.0"
[INFO] [stderr] 10 + [[bin]]
[INFO] [stderr] 11 + name = "rusty-chip"
[INFO] [stderr] 12 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `rusty_chip` (manifest) generated 2 warnings
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded read_color v1.0.0
[INFO] [stderr]   Downloaded pistoncore-glutin_window v0.47.0
[INFO] [stderr]   Downloaded token_store v0.1.2
[INFO] [stderr]   Downloaded piston2d-graphics v0.26.0
[INFO] [stderr]   Downloaded shader_version v0.3.0
[INFO] [stderr]   Downloaded gl v0.10.0
[INFO] [stderr]   Downloaded pistoncore-input v0.21.0
[INFO] [stderr]   Downloaded winit v0.12.0
[INFO] [stderr]   Downloaded interpolation v0.1.0
[INFO] [stderr]   Downloaded pistoncore-event_loop v0.37.0
[INFO] [stderr]   Downloaded inflate v0.4.3
[INFO] [stderr]   Downloaded rusttype v0.4.3
[INFO] [stderr]   Downloaded wayland-kbd v0.13.1
[INFO] [stderr]   Downloaded piston v0.37.0
[INFO] [stderr]   Downloaded glutin v0.14.0
[INFO] [stderr]   Downloaded wayland-client v0.12.5
[INFO] [stderr]   Downloaded piston-texture v0.6.0
[INFO] [stderr]   Downloaded piston-gfx_texture v0.32.0
[INFO] [stderr]   Downloaded gif v0.10.0
[INFO] [stderr]   Downloaded deflate v0.7.18
[INFO] [stderr]   Downloaded pistoncore-window v0.32.0
[INFO] [stderr]   Downloaded wayland-protocols v0.12.5
[INFO] [stderr]   Downloaded wayland-sys v0.12.5
[INFO] [stderr]   Downloaded wayland-scanner v0.12.5
[INFO] [stderr]   Downloaded piston-shaders_graphics2d v0.3.1
[INFO] [stderr]   Downloaded wayland-window v0.13.3
[INFO] [stderr]   Downloaded core-graphics v0.13.0
[INFO] [stderr]   Downloaded vecmath v0.3.1
[INFO] [stderr]   Downloaded syn v0.15.4
[INFO] [stderr]   Downloaded piston-viewport v0.3.0
[INFO] [stderr]   Downloaded cocoa v0.14.0
[INFO] [stderr]   Downloaded num-derive v0.2.2
[INFO] [stderr]   Downloaded version_check v0.1.4
[INFO] [stderr]   Downloaded gleam v0.6.0
[INFO] [stderr]   Downloaded piston_window v0.80.0
[INFO] [stderr]   Downloaded piston-float v0.3.0
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.51.0
[INFO] [stderr]   Downloaded core-foundation v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b
[INFO] running `Command { std: "docker" "start" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: binary `rusty_chip` should have a kebab-case name
[INFO] [stderr]    |
[INFO] [stderr]  1 | /opt/rustwide/target/.../rusty_chip
[INFO] [stderr]    |                          ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::non_kebab_case_bins` is set to `warn` by default
[INFO] [stderr] help: to change the binary name to `rusty-chip`, convert `package.name`
[INFO] [stderr]   --> Cargo.toml:8:8
[INFO] [stderr]    |
[INFO] [stderr]  8 - name = "rusty_chip"
[INFO] [stderr]  8 + name = "rusty-chip"
[INFO] [stderr]    |
[INFO] [stderr] help: to change the binary name to `rusty-chip`, specify `bin.name`
[INFO] [stderr]   --> Cargo.toml:9:19
[INFO] [stderr]    |
[INFO] [stderr]  9 ~ version = "0.1.0"
[INFO] [stderr] 10 + [[bin]]
[INFO] [stderr] 11 + name = "rusty-chip"
[INFO] [stderr] 12 + path = "src/main.rs"
[INFO] [stderr]    |
[INFO] [stderr] warning: `rusty_chip` (manifest) generated 2 warnings
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking piston-float v0.3.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking piston-viewport v0.3.0
[INFO] [stderr]     Checking token_store v0.1.2
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling syn v0.15.4
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]     Checking wayland-sys v0.12.5
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling x11-dl v2.18.3
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]     Checking shader_version v0.3.0
[INFO] [stderr]     Checking remove_dir_all v0.5.1
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking tempfile v3.0.4
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking wayland-kbd v0.13.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]     Checking wayland-window v0.13.3
[INFO] [stderr]    Compiling glutin v0.14.0
[INFO] [stderr]     Checking gfx_core v0.8.2
[INFO] [stderr]     Checking stb_truetype v0.2.4
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking piston-texture v0.6.0
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking rusttype v0.4.3
[INFO] [stderr]     Checking winit v0.12.0
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking vecmath v0.3.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking interpolation v0.1.0
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking piston-shaders_graphics2d v0.3.1
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking piston2d-graphics v0.26.0
[INFO] [stderr]     Checking pistoncore-input v0.21.0
[INFO] [stderr]     Checking piston-gfx_texture v0.32.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.51.0
[INFO] [stderr]     Checking gfx_device_gl v0.15.3
[INFO] [stderr]     Checking pistoncore-window v0.32.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.37.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.47.0
[INFO] [stderr]     Checking piston v0.37.0
[INFO] [stderr]     Checking piston_window v0.80.0
[INFO] [stderr]     Checking rusty_chip v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/cpu.rs:56:32
[INFO] [stdout]    |
[INFO] [stdout] 56 |     LeastSigStoreAndShift(u16, u16),
[INFO] [stdout]    |     ---------------------      ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opcode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 -     LeastSigStoreAndShift(u16, u16),
[INFO] [stdout] 56 +     LeastSigStoreAndShift(u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/cpu.rs:58:31
[INFO] [stdout]    |
[INFO] [stdout] 58 |     MostSigStoreAndShift(u16, u16),
[INFO] [stdout]    |     --------------------      ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opcode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 58 -     MostSigStoreAndShift(u16, u16),
[INFO] [stdout] 58 +     MostSigStoreAndShift(u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cpu.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | / ...   write!(
[INFO] [stdout] 26 | | ...       f,
[INFO] [stdout] 27 | | ...       "V0: {}\nV1: {}\nV2: {}\nV3: {}\nV4: {}\nV5: {}\nV6: {}\nV7: {}\nV8: {}\nV9: {}\nV10: {}\nV11: {}\nV12: {}\nV13: {}\nV14...
[INFO] [stdout] 28 | | ...       self.v[0], self.v[1], self.v[2],self.v[3], self.v[4], self.v[5],
[INFO] [stdout] 29 | | ...       self.v[6], self.v[7], self.v[8],self.v[9], self.v[10], self.v[11],
[INFO] [stdout] 30 | | ...       self.v[12], self.v[13], self.v[14],self.v[15]
[INFO] [stdout] 31 | | ...   );
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let _ = write!(
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/cpu.rs:96:9
[INFO] [stdout]     |
[INFO] [stdout]  96 | /         write!(
[INFO] [stdout]  97 | |             f,
[INFO] [stdout]  98 | |             "{:?}\n{:?}\n{}sp: {}\nI: {}\ndraw: {}\n",
[INFO] [stdout]  99 | |             self.debug_current_opcode,
[INFO] [stdout] ...   |
[INFO] [stdout] 104 | |             self.draw_flag
[INFO] [stdout] 105 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout]  96 |         let _ = write!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/cpu.rs:56:32
[INFO] [stdout]    |
[INFO] [stdout] 56 |     LeastSigStoreAndShift(u16, u16),
[INFO] [stdout]    |     ---------------------      ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opcode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 -     LeastSigStoreAndShift(u16, u16),
[INFO] [stdout] 56 +     LeastSigStoreAndShift(u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> src/cpu.rs:58:31
[INFO] [stdout]    |
[INFO] [stdout] 58 |     MostSigStoreAndShift(u16, u16),
[INFO] [stdout]    |     --------------------      ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opcode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 58 -     MostSigStoreAndShift(u16, u16),
[INFO] [stdout] 58 +     MostSigStoreAndShift(u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cpu.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | / ...   write!(
[INFO] [stdout] 26 | | ...       f,
[INFO] [stdout] 27 | | ...       "V0: {}\nV1: {}\nV2: {}\nV3: {}\nV4: {}\nV5: {}\nV6: {}\nV7: {}\nV8: {}\nV9: {}\nV10: {}\nV11: {}\nV12: {}\nV13: {}\nV14...
[INFO] [stdout] 28 | | ...       self.v[0], self.v[1], self.v[2],self.v[3], self.v[4], self.v[5],
[INFO] [stdout] 29 | | ...       self.v[6], self.v[7], self.v[8],self.v[9], self.v[10], self.v[11],
[INFO] [stdout] 30 | | ...       self.v[12], self.v[13], self.v[14],self.v[15]
[INFO] [stdout] 31 | | ...   );
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let _ = write!(
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/cpu.rs:96:9
[INFO] [stdout]     |
[INFO] [stdout]  96 | /         write!(
[INFO] [stdout]  97 | |             f,
[INFO] [stdout]  98 | |             "{:?}\n{:?}\n{}sp: {}\nI: {}\ndraw: {}\n",
[INFO] [stdout]  99 | |             self.debug_current_opcode,
[INFO] [stdout] ...   |
[INFO] [stdout] 104 | |             self.draw_flag
[INFO] [stdout] 105 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout]  96 |         let _ = write!(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.61s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: gfx_device_gl v0.15.3, glutin v0.14.0, serde_derive v1.0.79, syn v0.10.8, syn v0.14.9, winit v0.12.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b", kill_on_drop: false }`
[INFO] [stdout] 929490dedd143c81b8bb3b4d80f9fe55b9a28a4587182254d7357c5fb7bb3a2b
