[INFO] fetching crate apres 0.3.4...
[INFO] checking apres-0.3.4 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate apres 0.3.4 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate apres 0.3.4 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate apres 0.3.4
[INFO] finished tweaking crates.io crate apres 0.3.4
[INFO] tweaked toml for crates.io crate apres 0.3.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eac33d152fade9bab1aa763fcb6ac80e0ae9945404c7f94c5114ef4488cfcf69
[INFO] running `Command { std: "docker" "start" "-a" "eac33d152fade9bab1aa763fcb6ac80e0ae9945404c7f94c5114ef4488cfcf69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eac33d152fade9bab1aa763fcb6ac80e0ae9945404c7f94c5114ef4488cfcf69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eac33d152fade9bab1aa763fcb6ac80e0ae9945404c7f94c5114ef4488cfcf69", kill_on_drop: false }`
[INFO] [stdout] eac33d152fade9bab1aa763fcb6ac80e0ae9945404c7f94c5114ef4488cfcf69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] faeb69dd31db1fc6134cde6211a29f58f2326ad45742f0811b3f95e94d9d9f67
[INFO] running `Command { std: "docker" "start" "-a" "faeb69dd31db1fc6134cde6211a29f58f2326ad45742f0811b3f95e94d9d9f67", kill_on_drop: false }`
[INFO] [stderr]     Checking apres v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `min`
[INFO] [stdout]  --> src/lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::MIDIEvent::*`
[INFO] [stdout]  --> src/tests.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::MIDIEvent::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub mod tests;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MIDIEvent` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `MIDIEvent` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ApresError` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `ApresError` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `Instant`
[INFO] [stdout]  --> src/controller.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `min`
[INFO] [stdout]  --> src/lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MIDIEvent` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `MIDIEvent` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ApresError` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `ApresError` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `Instant`
[INFO] [stdout]  --> src/controller.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/controller.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/controller.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let n: u32;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]   --> src/controller.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let varlength: u64;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:733:13
[INFO] [stdout]     |
[INFO] [stdout] 733 |         let n: u32;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1286:17
[INFO] [stdout]      |
[INFO] [stdout] 1286 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `smpte` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |         let mut smpte: u32;
[INFO] [stdout]      |                 ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_smpte` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tpf` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1316:17
[INFO] [stdout]      |
[INFO] [stdout] 1316 |         let mut tpf: u32;
[INFO] [stdout]      |                 ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_tpf` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found_header` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1321:17
[INFO] [stdout]      |
[INFO] [stdout] 1321 |         let mut found_header = false;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_found_header` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `smpte` is never read
[INFO] [stdout]     --> src/lib.rs:1341:21
[INFO] [stdout]      |
[INFO] [stdout] 1341 |                     smpte = (((divword & 0x7F00) >> 8) as i8) as u32;
[INFO] [stdout]      |                     ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tpf` is never read
[INFO] [stdout]     --> src/lib.rs:1342:21
[INFO] [stdout]      |
[INFO] [stdout] 1342 |                     tpf = divword & 0x00FF;
[INFO] [stdout]      |                     ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found_header` is never read
[INFO] [stdout]     --> src/lib.rs:1349:17
[INFO] [stdout]      |
[INFO] [stdout] 1349 |                 found_header = true;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1364:58
[INFO] [stdout]      |
[INFO] [stdout] 1364 |                         Err(ApresError::UnknownMetaEvent(bytes)) => {
[INFO] [stdout]      |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1367:57
[INFO] [stdout]      |
[INFO] [stdout] 1367 |                         Err(ApresError::IllegibleString(bytes)) => {
[INFO] [stdout]      |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]     --> src/lib.rs:1385:13
[INFO] [stdout]      |
[INFO] [stdout] 1385 |         let n: u32;
[INFO] [stdout]      |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]     --> src/lib.rs:1386:13
[INFO] [stdout]      |
[INFO] [stdout] 1386 |         let varlength: u64;
[INFO] [stdout]      |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1468:17
[INFO] [stdout]      |
[INFO] [stdout] 1468 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track`
[INFO] [stdout]     --> src/lib.rs:1524:36
[INFO] [stdout]      |
[INFO] [stdout] 1524 |     pub fn get_track_length(&self, track: usize) -> usize {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_track`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:245:13
[INFO] [stdout]     |
[INFO] [stdout] 245 |         let mut event = ChannelPrefix(i as u8);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bpm`
[INFO] [stdout]    --> src/tests.rs:261:10
[INFO] [stdout]     |
[INFO] [stdout] 261 |     for (bpm, expected_uspqn) in test_cases_bpm.iter() {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_bpm`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut event = SetTempo(*expected_uspqn);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:24
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                        ----^^
[INFO] [stdout]      |                        |
[INFO] [stdout]      |                        help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:36
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                                    ----^^
[INFO] [stdout]      |                                    |
[INFO] [stdout]      |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1280:17
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 file.read(&mut buffer);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 let _ = file.read(&mut buffer);
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1466:17
[INFO] [stdout]      |
[INFO] [stdout] 1466 |                 file.write_all(bytes.as_slice());
[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] 1466 |                 let _ = file.write_all(bytes.as_slice());
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/controller.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/controller.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let n: u32;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]   --> src/controller.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let varlength: u64;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:733:13
[INFO] [stdout]     |
[INFO] [stdout] 733 |         let n: u32;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1286:17
[INFO] [stdout]      |
[INFO] [stdout] 1286 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `smpte` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |         let mut smpte: u32;
[INFO] [stdout]      |                 ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_smpte` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tpf` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1316:17
[INFO] [stdout]      |
[INFO] [stdout] 1316 |         let mut tpf: u32;
[INFO] [stdout]      |                 ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_tpf` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found_header` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1321:17
[INFO] [stdout]      |
[INFO] [stdout] 1321 |         let mut found_header = false;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_found_header` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `smpte` is never read
[INFO] [stdout]     --> src/lib.rs:1341:21
[INFO] [stdout]      |
[INFO] [stdout] 1341 |                     smpte = (((divword & 0x7F00) >> 8) as i8) as u32;
[INFO] [stdout]      |                     ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tpf` is never read
[INFO] [stdout]     --> src/lib.rs:1342:21
[INFO] [stdout]      |
[INFO] [stdout] 1342 |                     tpf = divword & 0x00FF;
[INFO] [stdout]      |                     ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found_header` is never read
[INFO] [stdout]     --> src/lib.rs:1349:17
[INFO] [stdout]      |
[INFO] [stdout] 1349 |                 found_header = true;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1364:58
[INFO] [stdout]      |
[INFO] [stdout] 1364 |                         Err(ApresError::UnknownMetaEvent(bytes)) => {
[INFO] [stdout]      |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1367:57
[INFO] [stdout]      |
[INFO] [stdout] 1367 |                         Err(ApresError::IllegibleString(bytes)) => {
[INFO] [stdout]      |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]     --> src/lib.rs:1385:13
[INFO] [stdout]      |
[INFO] [stdout] 1385 |         let n: u32;
[INFO] [stdout]      |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]     --> src/lib.rs:1386:13
[INFO] [stdout]      |
[INFO] [stdout] 1386 |         let varlength: u64;
[INFO] [stdout]      |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1468:17
[INFO] [stdout]      |
[INFO] [stdout] 1468 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track`
[INFO] [stdout]     --> src/lib.rs:1524:36
[INFO] [stdout]      |
[INFO] [stdout] 1524 |     pub fn get_track_length(&self, track: usize) -> usize {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_track`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:24
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                        ----^^
[INFO] [stdout]      |                        |
[INFO] [stdout]      |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:36
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                                    ----^^
[INFO] [stdout]      |                                    |
[INFO] [stdout]      |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1280:17
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 file.read(&mut buffer);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 let _ = file.read(&mut buffer);
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1466:17
[INFO] [stdout]      |
[INFO] [stdout] 1466 |                 file.write_all(bytes.as_slice());
[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] 1466 |                 let _ = file.write_all(bytes.as_slice());
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "faeb69dd31db1fc6134cde6211a29f58f2326ad45742f0811b3f95e94d9d9f67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faeb69dd31db1fc6134cde6211a29f58f2326ad45742f0811b3f95e94d9d9f67", kill_on_drop: false }`
[INFO] [stdout] faeb69dd31db1fc6134cde6211a29f58f2326ad45742f0811b3f95e94d9d9f67
[INFO] checking apres-0.3.4 against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] extracting crate apres 0.3.4 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate apres 0.3.4 on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate apres 0.3.4
[INFO] finished tweaking crates.io crate apres 0.3.4
[INFO] tweaked toml for crates.io crate apres 0.3.4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 323ced27994f69789188ce7cb70cc215e26edf8b70472221fa45a2cf9f92c95d
[INFO] running `Command { std: "docker" "start" "-a" "323ced27994f69789188ce7cb70cc215e26edf8b70472221fa45a2cf9f92c95d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "323ced27994f69789188ce7cb70cc215e26edf8b70472221fa45a2cf9f92c95d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "323ced27994f69789188ce7cb70cc215e26edf8b70472221fa45a2cf9f92c95d", kill_on_drop: false }`
[INFO] [stdout] 323ced27994f69789188ce7cb70cc215e26edf8b70472221fa45a2cf9f92c95d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 986b1479a21b6949715828f9c0e1b60cf72c89faf0f85f35ec18924d03b27dcd
[INFO] running `Command { std: "docker" "start" "-a" "986b1479a21b6949715828f9c0e1b60cf72c89faf0f85f35ec18924d03b27dcd", kill_on_drop: false }`
[INFO] [stderr]     Checking apres v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `min`
[INFO] [stdout]  --> src/lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::MIDIEvent::*`
[INFO] [stdout]  --> src/tests.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::MIDIEvent::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub mod tests;
[INFO] [stdout]   | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MIDIEvent` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `MIDIEvent` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ApresError` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `ApresError` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `Instant`
[INFO] [stdout]  --> src/controller.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `min`
[INFO] [stdout]  --> src/lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MIDIEvent` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `MIDIEvent` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ApresError` is imported redundantly
[INFO] [stdout]  --> src/controller.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `ApresError` is already imported here
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout] 3 | use super::{MIDIEvent, ApresError};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `Instant`
[INFO] [stdout]  --> src/controller.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/controller.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/controller.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let n: u32;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]   --> src/controller.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let varlength: u64;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:733:13
[INFO] [stdout]     |
[INFO] [stdout] 733 |         let n: u32;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1286:17
[INFO] [stdout]      |
[INFO] [stdout] 1286 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `smpte` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |         let mut smpte: u32;
[INFO] [stdout]      |                 ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_smpte` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tpf` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1316:17
[INFO] [stdout]      |
[INFO] [stdout] 1316 |         let mut tpf: u32;
[INFO] [stdout]      |                 ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_tpf` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found_header` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1321:17
[INFO] [stdout]      |
[INFO] [stdout] 1321 |         let mut found_header = false;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_found_header` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `smpte` is never read
[INFO] [stdout]     --> src/lib.rs:1341:21
[INFO] [stdout]      |
[INFO] [stdout] 1341 |                     smpte = (((divword & 0x7F00) >> 8) as i8) as u32;
[INFO] [stdout]      |                     ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tpf` is never read
[INFO] [stdout]     --> src/lib.rs:1342:21
[INFO] [stdout]      |
[INFO] [stdout] 1342 |                     tpf = divword & 0x00FF;
[INFO] [stdout]      |                     ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found_header` is never read
[INFO] [stdout]     --> src/lib.rs:1349:17
[INFO] [stdout]      |
[INFO] [stdout] 1349 |                 found_header = true;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1364:58
[INFO] [stdout]      |
[INFO] [stdout] 1364 |                         Err(ApresError::UnknownMetaEvent(bytes)) => {
[INFO] [stdout]      |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1367:57
[INFO] [stdout]      |
[INFO] [stdout] 1367 |                         Err(ApresError::IllegibleString(bytes)) => {
[INFO] [stdout]      |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]     --> src/lib.rs:1385:13
[INFO] [stdout]      |
[INFO] [stdout] 1385 |         let n: u32;
[INFO] [stdout]      |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]     --> src/lib.rs:1386:13
[INFO] [stdout]      |
[INFO] [stdout] 1386 |         let varlength: u64;
[INFO] [stdout]      |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1468:17
[INFO] [stdout]      |
[INFO] [stdout] 1468 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track`
[INFO] [stdout]     --> src/lib.rs:1524:36
[INFO] [stdout]      |
[INFO] [stdout] 1524 |     pub fn get_track_length(&self, track: usize) -> usize {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_track`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:24
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                        ----^^
[INFO] [stdout]      |                        |
[INFO] [stdout]      |                        help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:36
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                                    ----^^
[INFO] [stdout]      |                                    |
[INFO] [stdout]      |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1280:17
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 file.read(&mut buffer);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 let _ = file.read(&mut buffer);
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1466:17
[INFO] [stdout]      |
[INFO] [stdout] 1466 |                 file.write_all(bytes.as_slice());
[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] 1466 |                 let _ = file.write_all(bytes.as_slice());
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:245:13
[INFO] [stdout]     |
[INFO] [stdout] 245 |         let mut event = ChannelPrefix(i as u8);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bpm`
[INFO] [stdout]    --> src/tests.rs:261:10
[INFO] [stdout]     |
[INFO] [stdout] 261 |     for (bpm, expected_uspqn) in test_cases_bpm.iter() {
[INFO] [stdout]     |          ^^^ help: if this is intentional, prefix it with an underscore: `_bpm`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tests.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |         let mut event = SetTempo(*expected_uspqn);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/controller.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/controller.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let n: u32;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]   --> src/controller.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let varlength: u64;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:733:13
[INFO] [stdout]     |
[INFO] [stdout] 733 |         let n: u32;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1286:17
[INFO] [stdout]      |
[INFO] [stdout] 1286 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `smpte` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |         let mut smpte: u32;
[INFO] [stdout]      |                 ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_smpte` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tpf` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1316:17
[INFO] [stdout]      |
[INFO] [stdout] 1316 |         let mut tpf: u32;
[INFO] [stdout]      |                 ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_tpf` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found_header` is assigned to, but never used
[INFO] [stdout]     --> src/lib.rs:1321:17
[INFO] [stdout]      |
[INFO] [stdout] 1321 |         let mut found_header = false;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: consider using `_found_header` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `smpte` is never read
[INFO] [stdout]     --> src/lib.rs:1341:21
[INFO] [stdout]      |
[INFO] [stdout] 1341 |                     smpte = (((divword & 0x7F00) >> 8) as i8) as u32;
[INFO] [stdout]      |                     ^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tpf` is never read
[INFO] [stdout]     --> src/lib.rs:1342:21
[INFO] [stdout]      |
[INFO] [stdout] 1342 |                     tpf = divword & 0x00FF;
[INFO] [stdout]      |                     ^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found_header` is never read
[INFO] [stdout]     --> src/lib.rs:1349:17
[INFO] [stdout]      |
[INFO] [stdout] 1349 |                 found_header = true;
[INFO] [stdout]      |                 ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1364:58
[INFO] [stdout]      |
[INFO] [stdout] 1364 |                         Err(ApresError::UnknownMetaEvent(bytes)) => {
[INFO] [stdout]      |                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]     --> src/lib.rs:1367:57
[INFO] [stdout]      |
[INFO] [stdout] 1367 |                         Err(ApresError::IllegibleString(bytes)) => {
[INFO] [stdout]      |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]     --> src/lib.rs:1385:13
[INFO] [stdout]      |
[INFO] [stdout] 1385 |         let n: u32;
[INFO] [stdout]      |             ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `varlength`
[INFO] [stdout]     --> src/lib.rs:1386:13
[INFO] [stdout]      |
[INFO] [stdout] 1386 |         let varlength: u64;
[INFO] [stdout]      |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_varlength`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/lib.rs:1468:17
[INFO] [stdout]      |
[INFO] [stdout] 1468 |             Err(e) => {
[INFO] [stdout]      |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track`
[INFO] [stdout]     --> src/lib.rs:1524:36
[INFO] [stdout]      |
[INFO] [stdout] 1524 |     pub fn get_track_length(&self, track: usize) -> usize {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_track`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:24
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                        ----^^
[INFO] [stdout]      |                        |
[INFO] [stdout]      |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1672:36
[INFO] [stdout]      |
[INFO] [stdout] 1672 | fn build_key_signature(mut mi: u8, mut sf: u8) -> MIDIEvent {
[INFO] [stdout]      |                                    ----^^
[INFO] [stdout]      |                                    |
[INFO] [stdout]      |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1280:17
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 file.read(&mut buffer);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1280 |                 let _ = file.read(&mut buffer);
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1466:17
[INFO] [stdout]      |
[INFO] [stdout] 1466 |                 file.write_all(bytes.as_slice());
[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] 1466 |                 let _ = file.write_all(bytes.as_slice());
[INFO] [stdout]      |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "986b1479a21b6949715828f9c0e1b60cf72c89faf0f85f35ec18924d03b27dcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "986b1479a21b6949715828f9c0e1b60cf72c89faf0f85f35ec18924d03b27dcd", kill_on_drop: false }`
[INFO] [stdout] 986b1479a21b6949715828f9c0e1b60cf72c89faf0f85f35ec18924d03b27dcd
