[INFO] cloning repository https://github.com/s3bk/synth
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/s3bk/synth" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bk%2Fsynth", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bk%2Fsynth'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bfd0e561d7c63570d0928e9b60241a72a286f23a
[INFO] checking s3bk/synth against master#f2d69d5a7c04617d122facd0a7a5bdde0af928ae for pr-138363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs3bk%2Fsynth" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/s3bk/synth on toolchain f2d69d5a7c04617d122facd0a7a5bdde0af928ae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/s3bk/synth
[INFO] finished tweaking git repo https://github.com/s3bk/synth
[INFO] tweaked toml for git repo https://github.com/s3bk/synth written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/s3bk/synth 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" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1318b4dcb2e41d9bc83da8751df35df252720005c2801d949ac5b754fbdcb23
[INFO] running `Command { std: "docker" "start" "-a" "a1318b4dcb2e41d9bc83da8751df35df252720005c2801d949ac5b754fbdcb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1318b4dcb2e41d9bc83da8751df35df252720005c2801d949ac5b754fbdcb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1318b4dcb2e41d9bc83da8751df35df252720005c2801d949ac5b754fbdcb23", kill_on_drop: false }`
[INFO] [stdout] a1318b4dcb2e41d9bc83da8751df35df252720005c2801d949ac5b754fbdcb23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f2d69d5a7c04617d122facd0a7a5bdde0af928ae" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 211af15dc48640f3fd320d550256dfcb7b6d0ce919a6eb8e459709e9e634cdb7
[INFO] running `Command { std: "docker" "start" "-a" "211af15dc48640f3fd320d550256dfcb7b6d0ce919a6eb8e459709e9e634cdb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]    Compiling cpal v0.15.2
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking dasp_sample v0.11.0
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking alsa v0.7.1
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking midly v0.5.3
[INFO] [stderr]     Checking synth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc` and `Condvar`
[INFO] [stdout]  --> src/synth.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::VecDeque, sync::{Condvar, Arc, mpsc::{Receiver, channel, Sender}}};
[INFO] [stdout]   |                                         ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Condvar`
[INFO] [stdout]  --> src/synth.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::VecDeque, sync::{Condvar, Arc, mpsc::{Receiver, channel, Sender}}};
[INFO] [stdout]   |                                         ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]    --> src/synth.rs:197:65
[INFO] [stdout]     |
[INFO] [stdout] 197 |     pub fn new(freq: f64, sample_duration: f64, amplitude: f64, duration: f64, falloff: f32, colors: &'static [f32]) -> Self {
[INFO] [stdout]     |                                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_vel`
[INFO] [stdout]   --> src/midi.rs:45:54
[INFO] [stdout]    |
[INFO] [stdout] 45 | ...                   if let Some((start_tick, start_vel)) = active.remove(&(channel, key)) {
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_vel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]    --> src/synth.rs:197:65
[INFO] [stdout]     |
[INFO] [stdout] 197 |     pub fn new(freq: f64, sample_duration: f64, amplitude: f64, duration: f64, falloff: f32, colors: &'static [f32]) -> Self {
[INFO] [stdout]     |                                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start_vel`
[INFO] [stdout]   --> src/midi.rs:45:54
[INFO] [stdout]    |
[INFO] [stdout] 45 | ...                   if let Some((start_tick, start_vel)) = active.remove(&(channel, key)) {
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_vel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.38s
[INFO] running `Command { std: "docker" "inspect" "211af15dc48640f3fd320d550256dfcb7b6d0ce919a6eb8e459709e9e634cdb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "211af15dc48640f3fd320d550256dfcb7b6d0ce919a6eb8e459709e9e634cdb7", kill_on_drop: false }`
[INFO] [stdout] 211af15dc48640f3fd320d550256dfcb7b6d0ce919a6eb8e459709e9e634cdb7