[INFO] cloning repository https://github.com/Mersive-Technologies/rusbplay
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mersive-Technologies/rusbplay" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMersive-Technologies%2Frusbplay", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMersive-Technologies%2Frusbplay'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d35810cc3e53482b6d2906e5689e7ca66f923787
[INFO] checking Mersive-Technologies/rusbplay against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMersive-Technologies%2Frusbplay" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Mersive-Technologies/rusbplay
[INFO] finished tweaking git repo https://github.com/Mersive-Technologies/rusbplay
[INFO] tweaked toml for git repo https://github.com/Mersive-Technologies/rusbplay written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Mersive-Technologies/rusbplay on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Mersive-Technologies/rusbplay 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pkg-config v0.3.18
[INFO] [stderr]   Downloaded vcpkg v0.2.10
[INFO] [stderr]   Downloaded filetime v0.2.12
[INFO] [stderr]   Downloaded libflate v1.0.2
[INFO] [stderr]   Downloaded byte-slice-cast v0.3.5
[INFO] [stderr]   Downloaded rusb v0.6.4
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[INFO] [stderr]   Downloaded libc v0.2.77
[INFO] [stderr]   Downloaded libusb1-sys v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e57568efeb1f1097a30acdee9e8438eb6d9e292007cfcb5fe53ff545344368de
[INFO] running `Command { std: "docker" "start" "-a" "e57568efeb1f1097a30acdee9e8438eb6d9e292007cfcb5fe53ff545344368de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e57568efeb1f1097a30acdee9e8438eb6d9e292007cfcb5fe53ff545344368de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e57568efeb1f1097a30acdee9e8438eb6d9e292007cfcb5fe53ff545344368de", kill_on_drop: false }`
[INFO] [stdout] e57568efeb1f1097a30acdee9e8438eb6d9e292007cfcb5fe53ff545344368de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd10a95a3414e0e4f01b7eb104f01785a990e55cff756216e5409adff0e63e1d
[INFO] running `Command { std: "docker" "start" "-a" "cd10a95a3414e0e4f01b7eb104f01785a990e55cff756216e5409adff0e63e1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling proc-macro2 v1.0.23
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.24
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling libflate_lz77 v1.0.0
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling libflate v1.0.2
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]     Checking futures-task v0.3.5
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[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking thread_local v1.0.1
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[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]    Compiling libusb1-sys v0.4.2
[INFO] [stderr]     Checking rusb v0.6.4
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]     Checking pin-project v0.4.24
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking rusb-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::slice`
[INFO] [stdout]   --> src/transfer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::slice;
[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: `byte_slice_cast::AsSliceOf`
[INFO] [stdout]   --> src/transfer.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use byte_slice_cast::AsSliceOf;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DeviceHandle`
[INFO] [stdout]  --> src/main.rs:9:39
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rusb::{DeviceList, GlobalContext, DeviceHandle, UsbContext};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::SelectAll`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use futures::future::SelectAll;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/main.rs:75:40
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let ctx = GlobalContext::default();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout]  90 | /     loop {
[INFO] [stdout]  91 | |         let (res, idx, mut sub2) = futures::future::select_all(submissions.into_iter()).await;
[INFO] [stdout]  92 | |         trace!("Result={:?}", res);
[INFO] [stdout]  93 | |         if res.is_err() {
[INFO] [stdout] ...   |
[INFO] [stdout] 117 | |         submissions = sub2;
[INFO] [stdout] 118 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 119 |
[INFO] [stdout] 120 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         let mut xfer = &mut transfers[idx];
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/transfer.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let mut native_transfer = *&libusb_alloc_transfer(pkt_cnt as i32);
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IsoPacketDescriptor` is never constructed
[INFO] [stdout]   --> src/transfer.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct IsoPacketDescriptor {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_libusb` is never used
[INFO] [stdout]   --> src/transfer.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl IsoPacketDescriptor {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 22 |     pub fn from_libusb(src: &libusb_iso_packet_descriptor) -> IsoPacketDescriptor {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `actual_length` is never read
[INFO] [stdout]   --> src/transfer.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct TransferResult {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 44 |     pub status: i32,
[INFO] [stdout] 45 |     pub actual_length: i32,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TransferResult` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `result` is never read
[INFO] [stdout]   --> src/transfer.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub struct Submission {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 49 |     native_transfer: *mut libusb_transfer,
[INFO] [stdout] 50 |     result: Option<Result<TransferResult, Error>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `context` is never read
[INFO] [stdout]    --> src/transfer.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | pub struct Transfer<T: UsbContext> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] 104 |     context: T,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     handle.unconfigure();
[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] 50 |     let _ = handle.unconfigure();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     handle.write_control(0x21, 0x0a, 0x0000, 0x03, &[0u8; 0], Duration::from_millis(0)); // set idle
[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] 60 |     let _ = handle.write_control(0x21, 0x0a, 0x0000, 0x03, &[0u8; 0], Duration::from_millis(0)); // set idle
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     handle.write_control(0x21, 1, 0x0200, 0x0200, &[0x4cu8, 0xfau8], Duration::from_millis(0)); // set speaker volume
[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] 62 |     let _ = handle.write_control(0x21, 1, 0x0200, 0x0200, &[0x4cu8, 0xfau8], Duration::from_millis(0)); // set speaker volume
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     handle.write_control(0x21, 1, 0x0200, 0x0600, &[0x60u8, 0xe7u8], Duration::from_millis(0)); // set mic volume
[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] 63 |     let _ = handle.write_control(0x21, 1, 0x0200, 0x0600, &[0x60u8, 0xe7u8], Duration::from_millis(0)); // set mic volume
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 65 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 66 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 67 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 68 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 69 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transfer.rs:155:5
[INFO] [stdout]     |
[INFO] [stdout] 155 |     ctx.result_tail.send(result);
[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] 155 |     let _ = ctx.result_tail.send(result);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice`
[INFO] [stdout]   --> src/transfer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::slice;
[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: `byte_slice_cast::AsSliceOf`
[INFO] [stdout]   --> src/transfer.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use byte_slice_cast::AsSliceOf;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DeviceHandle`
[INFO] [stdout]  --> src/main.rs:9:39
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rusb::{DeviceList, GlobalContext, DeviceHandle, UsbContext};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::SelectAll`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use futures::future::SelectAll;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/main.rs:75:40
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let ctx = GlobalContext::default();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout]  90 | /     loop {
[INFO] [stdout]  91 | |         let (res, idx, mut sub2) = futures::future::select_all(submissions.into_iter()).await;
[INFO] [stdout]  92 | |         trace!("Result={:?}", res);
[INFO] [stdout]  93 | |         if res.is_err() {
[INFO] [stdout] ...   |
[INFO] [stdout] 117 | |         submissions = sub2;
[INFO] [stdout] 118 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 119 |
[INFO] [stdout] 120 |       Ok(())
[INFO] [stdout]     |       ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         let mut xfer = &mut transfers[idx];
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/transfer.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let mut native_transfer = *&libusb_alloc_transfer(pkt_cnt as i32);
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IsoPacketDescriptor` is never constructed
[INFO] [stdout]   --> src/transfer.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct IsoPacketDescriptor {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_libusb` is never used
[INFO] [stdout]   --> src/transfer.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl IsoPacketDescriptor {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 22 |     pub fn from_libusb(src: &libusb_iso_packet_descriptor) -> IsoPacketDescriptor {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `actual_length` is never read
[INFO] [stdout]   --> src/transfer.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct TransferResult {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 44 |     pub status: i32,
[INFO] [stdout] 45 |     pub actual_length: i32,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TransferResult` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `result` is never read
[INFO] [stdout]   --> src/transfer.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub struct Submission {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 49 |     native_transfer: *mut libusb_transfer,
[INFO] [stdout] 50 |     result: Option<Result<TransferResult, Error>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `context` is never read
[INFO] [stdout]    --> src/transfer.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | pub struct Transfer<T: UsbContext> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] 104 |     context: T,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     handle.unconfigure();
[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] 50 |     let _ = handle.unconfigure();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     handle.write_control(0x21, 0x0a, 0x0000, 0x03, &[0u8; 0], Duration::from_millis(0)); // set idle
[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] 60 |     let _ = handle.write_control(0x21, 0x0a, 0x0000, 0x03, &[0u8; 0], Duration::from_millis(0)); // set idle
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     handle.write_control(0x21, 1, 0x0200, 0x0200, &[0x4cu8, 0xfau8], Duration::from_millis(0)); // set speaker volume
[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] 62 |     let _ = handle.write_control(0x21, 1, 0x0200, 0x0200, &[0x4cu8, 0xfau8], Duration::from_millis(0)); // set speaker volume
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     handle.write_control(0x21, 1, 0x0200, 0x0600, &[0x60u8, 0xe7u8], Duration::from_millis(0)); // set mic volume
[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] 63 |     let _ = handle.write_control(0x21, 1, 0x0200, 0x0600, &[0x60u8, 0xe7u8], Duration::from_millis(0)); // set mic volume
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 65 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 65 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 66 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 67 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 68 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[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] 69 |     let _ = handle.write_control(0x21, 0x09, 0x0231, 0x03, &[0x31u8, 0x00u8], Duration::from_millis(0)); // set report
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transfer.rs:155:5
[INFO] [stdout]     |
[INFO] [stdout] 155 |     ctx.result_tail.send(result);
[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] 155 |     let _ = ctx.result_tail.send(result);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.57s
[INFO] running `Command { std: "docker" "inspect" "cd10a95a3414e0e4f01b7eb104f01785a990e55cff756216e5409adff0e63e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd10a95a3414e0e4f01b7eb104f01785a990e55cff756216e5409adff0e63e1d", kill_on_drop: false }`
[INFO] [stdout] cd10a95a3414e0e4f01b7eb104f01785a990e55cff756216e5409adff0e63e1d
