[INFO] fetching crate musicbox 0.3.0...
[INFO] checking musicbox-0.3.0 against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] extracting crate musicbox 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate musicbox 0.3.0
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate musicbox 0.3.0
[INFO] tweaked toml for crates.io crate musicbox 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate musicbox 0.3.0 on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate musicbox 0.3.0 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" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 694267d12162a1d37afa3d3d37615e7c699bf14c9ac8fdd495bb041e14831bdf
[INFO] running `Command { std: "docker" "start" "-a" "694267d12162a1d37afa3d3d37615e7c699bf14c9ac8fdd495bb041e14831bdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "694267d12162a1d37afa3d3d37615e7c699bf14c9ac8fdd495bb041e14831bdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "694267d12162a1d37afa3d3d37615e7c699bf14c9ac8fdd495bb041e14831bdf", kill_on_drop: false }`
[INFO] [stdout] 694267d12162a1d37afa3d3d37615e7c699bf14c9ac8fdd495bb041e14831bdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f2e12cf08ef7898fc17c6dfbe6fcea78586932c57089c8a23120f8824f8e65a
[INFO] running `Command { std: "docker" "start" "-a" "7f2e12cf08ef7898fc17c6dfbe6fcea78586932c57089c8a23120f8824f8e65a", kill_on_drop: false }`
[INFO] [stderr]     Checking musicbox v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::notary::Notary`
[INFO] [stdout]  --> src/fetchuser.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::notary::Notary;
[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: `crate::TONIC`
[INFO] [stdout]  --> src/fetchuser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::TONIC;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Notation::*`
[INFO] [stdout]  --> src/fetchuser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use Notation::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Chord`
[INFO] [stdout]  --> src/fetchuser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::Chord;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scales::chordlib::major::_major`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use scales::chordlib::major::_major;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fetch_input`
[INFO] [stdout]   --> src/lib.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 | use fetchuser::{fetch_input};
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mubot::Mubot`
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use mubot::Mubot;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::notary::Notary`
[INFO] [stdout]  --> src/fetchuser.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::notary::Notary;
[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: `crate::TONIC`
[INFO] [stdout]  --> src/fetchuser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::TONIC;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Notation::*`
[INFO] [stdout]  --> src/fetchuser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use Notation::*;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Chord`
[INFO] [stdout]  --> src/fetchuser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::Chord;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scales::chordlib::major::_major`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use scales::chordlib::major::_major;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fetch_input`
[INFO] [stdout]   --> src/lib.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 | use fetchuser::{fetch_input};
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mubot::Mubot`
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use mubot::Mubot;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/instrument/guitar.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let mut positions = vec![];
[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: `tonic`
[INFO] [stdout]   --> src/instrument/guitar.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 38 |         position0.iter_mut().for_each(|tonic| _1(music.tonic));
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_tonic`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chord` is never constructed
[INFO] [stdout]   --> src/lib.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Chord {
[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 `class` is never read
[INFO] [stdout]   --> src/instrument/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Instrument {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |     class: Classification,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `definition` and `values` are never read
[INFO] [stdout]   --> src/scales/mod.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Scale {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 44 |     definition: Vec<Notation>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 45 |     values: Vec<f64>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/scales/mod.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Scale {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 49 |     fn ionian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn dorian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn phyrgian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn lydian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn mixolydian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn aeolian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn locrian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mode` is never used
[INFO] [stdout]  --> src/scales/mode.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Mode {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bars` is never read
[INFO] [stdout]  --> src/score/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct MusicScore{
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 9 |     bars: Bar,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rhythm` and `instruments` are never read
[INFO] [stdout]   --> src/score/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Bar {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 14 |     rhythm: Rhythm, 
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 15 |     instruments: Instrument,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TimeSign` is never constructed
[INFO] [stdout]   --> src/score/mod.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct TimeSign {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tempo` and `time` are never read
[INFO] [stdout]  --> src/score/rhythm.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Rhythm {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 2 |     tempo: u16, //BPM
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 3 |     time: u8,   //Divisions in a bar
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/fetchuser.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     stdin().read_line(&mut io_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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = stdin().read_line(&mut io_buffer);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/instrument/guitar.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let mut positions = vec![];
[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: `tonic`
[INFO] [stdout]   --> src/instrument/guitar.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 38 |         position0.iter_mut().for_each(|tonic| _1(music.tonic));
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_tonic`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chord` is never constructed
[INFO] [stdout]   --> src/lib.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Chord {
[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 `class` is never read
[INFO] [stdout]   --> src/instrument/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Instrument {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |     class: Classification,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `definition` and `values` are never read
[INFO] [stdout]   --> src/scales/mod.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Scale {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 44 |     definition: Vec<Notation>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 45 |     values: Vec<f64>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/scales/mod.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Scale {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 49 |     fn ionian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn dorian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn phyrgian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn lydian(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn mixolydian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn aeolian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn locrian(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mode` is never used
[INFO] [stdout]  --> src/scales/mode.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Mode {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bars` is never read
[INFO] [stdout]  --> src/score/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct MusicScore{
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 9 |     bars: Bar,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rhythm` and `instruments` are never read
[INFO] [stdout]   --> src/score/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Bar {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 14 |     rhythm: Rhythm, 
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 15 |     instruments: Instrument,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TimeSign` is never constructed
[INFO] [stdout]   --> src/score/mod.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct TimeSign {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tempo` and `time` are never read
[INFO] [stdout]  --> src/score/rhythm.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Rhythm {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 2 |     tempo: u16, //BPM
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 3 |     time: u8,   //Divisions in a bar
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/fetchuser.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     stdin().read_line(&mut io_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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = stdin().read_line(&mut io_buffer);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "7f2e12cf08ef7898fc17c6dfbe6fcea78586932c57089c8a23120f8824f8e65a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f2e12cf08ef7898fc17c6dfbe6fcea78586932c57089c8a23120f8824f8e65a", kill_on_drop: false }`
[INFO] [stdout] 7f2e12cf08ef7898fc17c6dfbe6fcea78586932c57089c8a23120f8824f8e65a
