[INFO] cloning repository https://github.com/zachs18/midi-player-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zachs18/midi-player-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachs18%2Fmidi-player-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachs18%2Fmidi-player-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68d0679b7176367ac832dba42063d3ac3b763c53
[INFO] checking zachs18/midi-player-rs against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachs18%2Fmidi-player-rs" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zachs18/midi-player-rs
[INFO] finished tweaking git repo https://github.com/zachs18/midi-player-rs
[INFO] tweaked toml for git repo https://github.com/zachs18/midi-player-rs written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zachs18/midi-player-rs on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zachs18/midi-player-rs 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-0-tc2/source/player/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fc9097075a8871cbb3ea28c8a3d79f0f735914d6a192e4ae26e9247c24e4f1f
[INFO] running `Command { std: "docker" "start" "-a" "0fc9097075a8871cbb3ea28c8a3d79f0f735914d6a192e4ae26e9247c24e4f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fc9097075a8871cbb3ea28c8a3d79f0f735914d6a192e4ae26e9247c24e4f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc9097075a8871cbb3ea28c8a3d79f0f735914d6a192e4ae26e9247c24e4f1f", kill_on_drop: false }`
[INFO] [stdout] 0fc9097075a8871cbb3ea28c8a3d79f0f735914d6a192e4ae26e9247c24e4f1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e9da8dbdf9c2fdb92859d79ef075e52f1bab406f7159d51e214472e86340f79
[INFO] running `Command { std: "docker" "start" "-a" "3e9da8dbdf9c2fdb92859d79ef075e52f1bab406f7159d51e214472e86340f79", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /opt/rustwide/workdir/player/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling rayon-core v1.9.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling rayon v1.5.2
[INFO] [stderr]     Checking bytemuck v1.9.1
[INFO] [stderr]    Compiling player v0.1.0 (/opt/rustwide/workdir/player)
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling libpulse-sys v1.19.3
[INFO] [stderr]    Compiling libpulse-simple-sys v1.19.2
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking midly v0.5.2
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking tokio v1.18.1
[INFO] [stderr]     Checking libpulse-binding v2.26.0
[INFO] [stderr]     Checking libpulse-simple-binding v2.25.0
[INFO] [stdout] warning: unused imports: `Instant`, `env`, and `io::Read`
[INFO] [stdout]  --> player/src/main.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{time::{Duration, Instant}, io::Read, os::unix::prelude::AsRawFd, env};
[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: `pulse::sample::CHANNELS_MAX`
[INFO] [stdout]  --> player/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pulse::sample::CHANNELS_MAX;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> player/src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     'main_loop: while running {
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Instant`, `env`, and `io::Read`
[INFO] [stdout]  --> player/src/main.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{time::{Duration, Instant}, io::Read, os::unix::prelude::AsRawFd, env};
[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: `pulse::sample::CHANNELS_MAX`
[INFO] [stdout]  --> player/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pulse::sample::CHANNELS_MAX;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> player/src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     'main_loop: while running {
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `libpulse_binding::sample::CHANNELS_MAX`: use associated constants on structs instead
[INFO] [stdout]  --> player/src/main.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pulse::sample::CHANNELS_MAX;
[INFO] [stdout]   |                    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `libpulse_binding::sample::CHANNELS_MAX`: use associated constants on structs instead
[INFO] [stdout]  --> player/src/main.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pulse::sample::CHANNELS_MAX;
[INFO] [stdout]   |                    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]   --> player/src/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let ret = unsafe {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> player/src/main.rs:122:9
[INFO] [stdout]     |
[INFO] [stdout] 122 |     let mut stdin = std::io::stdin();
[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: unused variable: `start`
[INFO] [stdout]    --> player/src/main.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |         let start = std::time::Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channel`
[INFO] [stdout]    --> player/src/main.rs:198:18
[INFO] [stdout]     |
[INFO] [stdout] 198 |             for (channel, channel_notes) in notes.iter_mut().enumerate() {
[INFO] [stdout]     |                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `opt_sin` is never used
[INFO] [stdout]   --> player/src/main.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn opt_sin(x: f64) -> f64 {
[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 `full_amplitude` is never read
[INFO] [stdout]   --> player/src/main.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Instrument {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 69 |     amplitudes: &'static [f64],
[INFO] [stdout] 70 |     full_amplitude: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instrument` 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: function `opt_sin` is never used
[INFO] [stdout]  --> player/src/main.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 |         pub(super) fn opt_sin(x: f64) -> f64;
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]   --> player/src/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let ret = unsafe {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> player/src/main.rs:122:9
[INFO] [stdout]     |
[INFO] [stdout] 122 |     let mut stdin = std::io::stdin();
[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: unused variable: `start`
[INFO] [stdout]    --> player/src/main.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |         let start = std::time::Instant::now();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channel`
[INFO] [stdout]    --> player/src/main.rs:198:18
[INFO] [stdout]     |
[INFO] [stdout] 198 |             for (channel, channel_notes) in notes.iter_mut().enumerate() {
[INFO] [stdout]     |                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `opt_sin` is never used
[INFO] [stdout]   --> player/src/main.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn opt_sin(x: f64) -> f64 {
[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 `full_amplitude` is never read
[INFO] [stdout]   --> player/src/main.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct Instrument {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 69 |     amplitudes: &'static [f64],
[INFO] [stdout] 70 |     full_amplitude: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instrument` 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: function `opt_sin` is never used
[INFO] [stdout]  --> player/src/main.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 |         pub(super) fn opt_sin(x: f64) -> f64;
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> parser/src/lib.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut progress = midi.tracks.iter().flat_map(
[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: field `todo` is never read
[INFO] [stdout]  --> parser/src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct MidiEventStream<'a> {
[INFO] [stdout]   |            --------------- field in this struct
[INFO] [stdout] 8 |     sleep: Option<Pin<Box<Sleep>>>,
[INFO] [stdout] 9 |     todo: &'a Smf<'a>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Peekable` in tuple element 1 that must be used
[INFO] [stdout]   --> parser/src/lib.rs:68:25
[INFO] [stdout]    |
[INFO] [stdout] 68 |                         progress.remove(i);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> parser/src/lib.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut progress = midi.tracks.iter().flat_map(
[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: field `todo` is never read
[INFO] [stdout]  --> parser/src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct MidiEventStream<'a> {
[INFO] [stdout]   |            --------------- field in this struct
[INFO] [stdout] 8 |     sleep: Option<Pin<Box<Sleep>>>,
[INFO] [stdout] 9 |     todo: &'a Smf<'a>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Peekable` in tuple element 1 that must be used
[INFO] [stdout]   --> parser/src/lib.rs:68:25
[INFO] [stdout]    |
[INFO] [stdout] 68 |                         progress.remove(i);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `midly::TrackEventKind`
[INFO] [stdout]  --> parser/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use midly::TrackEventKind;
[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 `Result` that must be used
[INFO] [stdout]   --> parser/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     file.rewind();
[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] 19 |     let _ = file.rewind();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> parser/src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     file.read_to_end(&mut data);
[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] 23 |     let _ = file.read_to_end(&mut data);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `midly::TrackEventKind`
[INFO] [stdout]  --> parser/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use midly::TrackEventKind;
[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 `Result` that must be used
[INFO] [stdout]   --> parser/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     file.rewind();
[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] 19 |     let _ = file.rewind();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> parser/src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     file.read_to_end(&mut data);
[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] 23 |     let _ = file.read_to_end(&mut data);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.54s
[INFO] running `Command { std: "docker" "inspect" "3e9da8dbdf9c2fdb92859d79ef075e52f1bab406f7159d51e214472e86340f79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e9da8dbdf9c2fdb92859d79ef075e52f1bab406f7159d51e214472e86340f79", kill_on_drop: false }`
[INFO] [stdout] 3e9da8dbdf9c2fdb92859d79ef075e52f1bab406f7159d51e214472e86340f79
