[INFO] updating cached repository sm-Fifteen/steam-controller-tracker-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sm-Fifteen/steam-controller-tracker-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sm-Fifteen/steam-controller-tracker-rs" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sm-Fifteen/steam-controller-tracker-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sm-Fifteen/steam-controller-tracker-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sm-Fifteen/steam-controller-tracker-rs" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sm-Fifteen/steam-controller-tracker-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sm-Fifteen/steam-controller-tracker-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3998c4c08b86a6f61e17cc76613af7622ad6a70c
[INFO] sha for GitHub repo sm-Fifteen/steam-controller-tracker-rs: 3998c4c08b86a6f61e17cc76613af7622ad6a70c
[INFO] validating manifest of sm-Fifteen/steam-controller-tracker-rs on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sm-Fifteen/steam-controller-tracker-rs on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sm-Fifteen/steam-controller-tracker-rs
[INFO] finished frobbing sm-Fifteen/steam-controller-tracker-rs
[INFO] frobbed toml for sm-Fifteen/steam-controller-tracker-rs written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sm-Fifteen/steam-controller-tracker-rs/Cargo.toml
[INFO] started frobbing sm-Fifteen/steam-controller-tracker-rs
[INFO] finished frobbing sm-Fifteen/steam-controller-tracker-rs
[INFO] frobbed toml for sm-Fifteen/steam-controller-tracker-rs written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sm-Fifteen/steam-controller-tracker-rs/Cargo.toml
[INFO] crate sm-Fifteen/steam-controller-tracker-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sm-Fifteen/steam-controller-tracker-rs against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sm-Fifteen/steam-controller-tracker-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7d9981917b2f24545e3d4e7a65f78b075734ad5a4e66d1c9a75847e722ebc200
[INFO] running `"docker" "start" "-a" "7d9981917b2f24545e3d4e7a65f78b075734ad5a4e66d1c9a75847e722ebc200"`
[INFO] [stderr]    Compiling openmpt-sys v0.1.0
[INFO] [stderr]     Checking crossbeam v0.3.0
[INFO] [stderr]    Compiling libusb-sys v0.2.3
[INFO] [stderr]     Checking bit-set v0.2.0
[INFO] [stderr]     Checking openmpt v0.3.1
[INFO] [stderr]     Checking libusb v0.3.0
[INFO] [stderr]     Checking steam-controller-tracker-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Cell`, `Pattern`
[INFO] [stderr]  --> src/module_parser.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | use openmpt::module::iteration::{Pattern, Row, Cell};
[INFO] [stderr]   |                                  ^^^^^^^       ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Note`
[INFO] [stderr]  --> src/routines.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use music::{Note, ChannelInstruction};
[INFO] [stderr]   |             ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `libusb`
[INFO] [stderr]   --> src/main.rs:58:6
[INFO] [stderr]    |
[INFO] [stderr] 58 |     use libusb;
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `device_io`
[INFO] [stderr]   --> src/main.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |     use super::{music, device_io};
[INFO] [stderr]    |                        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cell`, `Pattern`
[INFO] [stderr]  --> src/module_parser.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | use openmpt::module::iteration::{Pattern, Row, Cell};
[INFO] [stderr]   |                                  ^^^^^^^       ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Note`
[INFO] [stderr]  --> src/routines.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use music::{Note, ChannelInstruction};
[INFO] [stderr]   |             ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 |             let mut dm = DeviceManager::new(&scope, &mut libusb_context);
[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/main.rs:76:7
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut note = music::Note::new(96);
[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/main.rs:77:7
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut instr = music::Instrument::PulseWave(1, 1);
[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/device_io.rs:55:7
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut iter_list = libusb_context.devices().unwrap();
[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/device_io.rs:56:7
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut iter = iter_list.iter();
[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/device_io.rs:57:7
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let mut devices = Vec::<Device<'a>>::new();
[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/device_io.rs:55:7
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let mut iter_list = libusb_context.devices().unwrap();
[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/device_io.rs:56:7
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut iter = iter_list.iter();
[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/device_io.rs:57:7
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let mut devices = Vec::<Device<'a>>::new();
[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/module_parser.rs:45:7
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut state = &mut chan_state[idx..idx+1];
[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/playback_timer.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 let mut state = state_chunks.next().expect("State and device lists do not match");
[INFO] [stderr]    |                     ----^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `libusb_context`
[INFO] [stderr]   --> src/device_io.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     libusb_context: &'a Context,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `devices`
[INFO] [stderr]   --> src/device_io.rs:16:2
[INFO] [stderr]    |
[INFO] [stderr] 16 |     devices: Vec<Device<'a>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_channels`
[INFO] [stderr]   --> src/module_parser.rs:10:2
[INFO] [stderr]    |
[INFO] [stderr] 10 |     num_channels: i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/module_parser.rs:45:7
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut state = &mut chan_state[idx..idx+1];
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |         buf.write_u8(0x8f); // Feedback data
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |         buf.write_u8(0x08); // Length : 8 bytes
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |         buf.write_u8(self.haptic_channel);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:34:3
[INFO] [stderr]    |
[INFO] [stderr] 34 |         buf.write_u16::<LittleEndian>(self.hi_period);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |         buf.write_u16::<LittleEndian>(self.lo_period);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |         buf.write_u16::<LittleEndian>(self.cycle_count);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |         buf.write_u8(self.priority);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 handle.detach_kernel_driver(2);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:80:7
[INFO] [stderr]    |
[INFO] [stderr] 80 |                         Self::send_control(handle_ref, control);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |                               match instruction {
[INFO] [stderr]    |  _____________________________^
[INFO] [stderr] 65 | |                                 ChannelInstruction::Stop => device_manager.play_raw(channel_idx, 0, 0, 0),
[INFO] [stderr] 66 | |                                 ChannelInstruction::Long(note) => device_manager.play_note(channel_idx, &note, &instrument, None),
[INFO] [stderr] 67 | |                                 ChannelInstruction::Short(note) => device_manager.play_note(channel_idx, &note, &instrument, Some(tick_duration)),
[INFO] [stderr] 68 | |                             };
[INFO] [stderr]    | |______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:72:8
[INFO] [stderr]    |
[INFO] [stderr] 72 |                             device_manager.play_note(channel_idx, &note, &instrument, None);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:75:7
[INFO] [stderr]    |
[INFO] [stderr] 75 |                         tick_timer_thread.join();
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:81:3
[INFO] [stderr]    |
[INFO] [stderr] 81 |         row_timer_thread.join();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/playback_timer.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 let mut state = state_chunks.next().expect("State and device lists do not match");
[INFO] [stderr]    |                     ----^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `libusb_context`
[INFO] [stderr]   --> src/device_io.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     libusb_context: &'a Context,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `devices`
[INFO] [stderr]   --> src/device_io.rs:16:2
[INFO] [stderr]    |
[INFO] [stderr] 16 |     devices: Vec<Device<'a>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_channels`
[INFO] [stderr]   --> src/module_parser.rs:10:2
[INFO] [stderr]    |
[INFO] [stderr] 10 |     num_channels: i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |         buf.write_u8(0x8f); // Feedback data
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |         buf.write_u8(0x08); // Length : 8 bytes
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |         buf.write_u8(self.haptic_channel);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:34:3
[INFO] [stderr]    |
[INFO] [stderr] 34 |         buf.write_u16::<LittleEndian>(self.hi_period);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |         buf.write_u16::<LittleEndian>(self.lo_period);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |         buf.write_u16::<LittleEndian>(self.cycle_count);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |         buf.write_u8(self.priority);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 handle.detach_kernel_driver(2);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/device_io.rs:80:7
[INFO] [stderr]    |
[INFO] [stderr] 80 |                         Self::send_control(handle_ref, control);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |                               match instruction {
[INFO] [stderr]    |  _____________________________^
[INFO] [stderr] 65 | |                                 ChannelInstruction::Stop => device_manager.play_raw(channel_idx, 0, 0, 0),
[INFO] [stderr] 66 | |                                 ChannelInstruction::Long(note) => device_manager.play_note(channel_idx, &note, &instrument, None),
[INFO] [stderr] 67 | |                                 ChannelInstruction::Short(note) => device_manager.play_note(channel_idx, &note, &instrument, Some(tick_duration)),
[INFO] [stderr] 68 | |                             };
[INFO] [stderr]    | |______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:72:8
[INFO] [stderr]    |
[INFO] [stderr] 72 |                             device_manager.play_note(channel_idx, &note, &instrument, None);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:75:7
[INFO] [stderr]    |
[INFO] [stderr] 75 |                         tick_timer_thread.join();
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/playback_timer.rs:81:3
[INFO] [stderr]    |
[INFO] [stderr] 81 |         row_timer_thread.join();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.16s
[INFO] running `"docker" "inspect" "7d9981917b2f24545e3d4e7a65f78b075734ad5a4e66d1c9a75847e722ebc200"`
[INFO] running `"docker" "rm" "-f" "7d9981917b2f24545e3d4e7a65f78b075734ad5a4e66d1c9a75847e722ebc200"`
[INFO] [stdout] 7d9981917b2f24545e3d4e7a65f78b075734ad5a4e66d1c9a75847e722ebc200