[INFO] fetching crate ksynth 0.11.4...
[INFO] checking ksynth-0.11.4 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate ksynth 0.11.4 into /workspace/builds/worker-84/source
[INFO] validating manifest of crates.io crate ksynth 0.11.4 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ksynth 0.11.4
[INFO] finished tweaking crates.io crate ksynth 0.11.4
[INFO] tweaked toml for crates.io crate ksynth 0.11.4 written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c42c0698ef676d8b3fc5d0df0fbd360366f787e1750189bbf2d0c8ff6ec72c5
[INFO] running `Command { std: "docker" "start" "-a" "1c42c0698ef676d8b3fc5d0df0fbd360366f787e1750189bbf2d0c8ff6ec72c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c42c0698ef676d8b3fc5d0df0fbd360366f787e1750189bbf2d0c8ff6ec72c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c42c0698ef676d8b3fc5d0df0fbd360366f787e1750189bbf2d0c8ff6ec72c5", kill_on_drop: false }`
[INFO] [stdout] 1c42c0698ef676d8b3fc5d0df0fbd360366f787e1750189bbf2d0c8ff6ec72c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0549e62a8832e76a5cd12f4791353403ec8fcd9cdb872902086b7c1cc2f339d
[INFO] running `Command { std: "docker" "start" "-a" "d0549e62a8832e76a5cd12f4791353403ec8fcd9cdb872902086b7c1cc2f339d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking bit v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.2
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.4
[INFO] [stderr]     Checking num_enum v0.5.4
[INFO] [stderr]     Checking ksynth v0.11.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::RangeInclusive`
[INFO] [stdout]  --> src/k5000/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::RangeInclusive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::k4::bank::Bank`
[INFO] [stdout]  --> src/k4/multi.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::k4::bank::Bank;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `info`, `warn`
[INFO] [stdout]  --> src/k4/drum.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use log::{info, warn, error, debug};
[INFO] [stdout]   |           ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `info`, `warn`
[INFO] [stdout]  --> src/k4/bank.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use log::{info, warn, error, debug};
[INFO] [stdout]   |           ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::RangeInclusive`
[INFO] [stdout]  --> src/k5000/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::RangeInclusive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `*`
[INFO] [stdout]    --> src/k5000/lfo.rs:163:17
[INFO] [stdout]     |
[INFO] [stdout] 163 |     use super::{*};
[INFO] [stdout]     |                 ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `info`, `warn`
[INFO] [stdout]  --> src/k4/drum.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use log::{info, warn, error, debug};
[INFO] [stdout]   |           ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `info`, `warn`
[INFO] [stdout]  --> src/k4/bank.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use log::{info, warn, error, debug};
[INFO] [stdout]   |           ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/lib.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |     for (index, value) in v.iter().enumerate() {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/k5000/single.rs:326:13
[INFO] [stdout]     |
[INFO] [stdout] 326 |         for i in 0..common.source_count {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]    --> src/k5000/single.rs:344:17
[INFO] [stdout]     |
[INFO] [stdout] 344 |         let mut count = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k5000/single.rs:386:17
[INFO] [stdout]     |
[INFO] [stdout] 386 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `size` is never read
[INFO] [stdout]    --> src/k5000/single.rs:387:17
[INFO] [stdout]     |
[INFO] [stdout] 387 |         let mut size: usize = 0;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `offset` is never read
[INFO] [stdout]   --> src/k5000/addkit.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let mut offset = 0;
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/amp.rs:208:17
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/amp.rs:209:17
[INFO] [stdout]     |
[INFO] [stdout] 209 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/filter.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/filter.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]   --> src/k4/multi.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut end: usize = 0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/k4/multi.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         for i in 0..SECTION_COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_name`
[INFO] [stdout]    --> src/k4/single.rs:198:28
[INFO] [stdout]     |
[INFO] [stdout] 198 |     pub fn set_name(&self, new_name: &str) {
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/single.rs:317:17
[INFO] [stdout]     |
[INFO] [stdout] 317 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/single.rs:318:17
[INFO] [stdout]     |
[INFO] [stdout] 318 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `original_checksum`
[INFO] [stdout]    --> src/k4/single.rs:446:13
[INFO] [stdout]     |
[INFO] [stdout] 446 |         let original_checksum = b; // store the checksum as we got it from SysEx
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_original_checksum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/k4/source.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut start: usize = 0;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]   --> src/k4/source.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut end: usize = 0;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/k4/amp.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let mut b: 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: variable does not need to be mutable
[INFO] [stdout]   --> src/k4/multi.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut start: usize = 0;
[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/k4/source.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut start: usize = 0;
[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/k4/source.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut end: usize = 0;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/lib.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |     for (index, value) in v.iter().enumerate() {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/k5000/single.rs:326:13
[INFO] [stdout]     |
[INFO] [stdout] 326 |         for i in 0..common.source_count {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]    --> src/k5000/single.rs:344:17
[INFO] [stdout]     |
[INFO] [stdout] 344 |         let mut count = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k5000/single.rs:386:17
[INFO] [stdout]     |
[INFO] [stdout] 386 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `size` is never read
[INFO] [stdout]    --> src/k5000/single.rs:387:17
[INFO] [stdout]     |
[INFO] [stdout] 387 |         let mut size: usize = 0;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `offset` is never read
[INFO] [stdout]   --> src/k5000/addkit.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let mut offset = 0;
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/amp.rs:208:17
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/amp.rs:209:17
[INFO] [stdout]     |
[INFO] [stdout] 209 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/filter.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/filter.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]   --> src/k4/multi.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut end: usize = 0;
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/k4/multi.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         for i in 0..SECTION_COUNT {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_name`
[INFO] [stdout]    --> src/k4/single.rs:198:28
[INFO] [stdout]     |
[INFO] [stdout] 198 |     pub fn set_name(&self, new_name: &str) {
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/k4/single.rs:317:17
[INFO] [stdout]     |
[INFO] [stdout] 317 |         let mut start: usize = 0;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `end` is never read
[INFO] [stdout]    --> src/k4/single.rs:318:17
[INFO] [stdout]     |
[INFO] [stdout] 318 |         let mut end: usize = 0;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `original_checksum`
[INFO] [stdout]    --> src/k4/single.rs:446:13
[INFO] [stdout]     |
[INFO] [stdout] 446 |         let original_checksum = b; // store the checksum as we got it from SysEx
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_original_checksum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/k4/source.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut start: usize = 0;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]   --> src/k4/source.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut end: usize = 0;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/k4/amp.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let mut b: 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: variable does not need to be mutable
[INFO] [stdout]   --> src/k4/multi.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut start: usize = 0;
[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/k4/source.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut start: usize = 0;
[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/k4/source.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut end: usize = 0;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.86s
[INFO] running `Command { std: "docker" "inspect" "d0549e62a8832e76a5cd12f4791353403ec8fcd9cdb872902086b7c1cc2f339d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0549e62a8832e76a5cd12f4791353403ec8fcd9cdb872902086b7c1cc2f339d", kill_on_drop: false }`
[INFO] [stdout] d0549e62a8832e76a5cd12f4791353403ec8fcd9cdb872902086b7c1cc2f339d
