[INFO] fetching crate cpal 0.13.1...
[INFO] testing cpal-0.13.1 against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] extracting crate cpal 0.13.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cpal 0.13.1 on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cpal 0.13.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate cpal 0.13.1
[INFO] tweaked toml for crates.io crate cpal 0.13.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate cpal 0.13.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86bdfe1988784de633148bb22e4753fd32c3142678cb8314c0a62d17593bc254
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "86bdfe1988784de633148bb22e4753fd32c3142678cb8314c0a62d17593bc254", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86bdfe1988784de633148bb22e4753fd32c3142678cb8314c0a62d17593bc254", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86bdfe1988784de633148bb22e4753fd32c3142678cb8314c0a62d17593bc254", kill_on_drop: false }`
[INFO] [stdout] 86bdfe1988784de633148bb22e4753fd32c3142678cb8314c0a62d17593bc254
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3800eaccbaf3e4c35ca1566fefa27efb374a9a8318db44779fc63378e1129d62
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3800eaccbaf3e4c35ca1566fefa27efb374a9a8318db44779fc63378e1129d62", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling cpal v0.13.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling alsa-sys v0.3.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling alsa v0.4.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:711:20
[INFO] [stdout]     |
[INFO] [stdout] 711 |     stream.channel.io().readi(buffer)?;
[INFO] [stdout]     |                    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:756:30
[INFO] [stdout]     |
[INFO] [stdout] 756 |         match stream.channel.io().writei(buffer) {
[INFO] [stdout]     |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.15s
[INFO] running `Command { std: "docker" "inspect" "3800eaccbaf3e4c35ca1566fefa27efb374a9a8318db44779fc63378e1129d62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3800eaccbaf3e4c35ca1566fefa27efb374a9a8318db44779fc63378e1129d62", kill_on_drop: false }`
[INFO] [stdout] 3800eaccbaf3e4c35ca1566fefa27efb374a9a8318db44779fc63378e1129d62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d0a2b5807eec7b72c15a88543696ff4aa97c8ad2e480ba78a06404f1e61b066
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8d0a2b5807eec7b72c15a88543696ff4aa97c8ad2e480ba78a06404f1e61b066", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling ringbuf v0.2.2
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:711:20
[INFO] [stdout]     |
[INFO] [stdout] 711 |     stream.channel.io().readi(buffer)?;
[INFO] [stdout]     |                    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:756:30
[INFO] [stdout]     |
[INFO] [stdout] 756 |         match stream.channel.io().writei(buffer) {
[INFO] [stdout]     |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cpal v0.13.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> examples/record_wav.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sample_format`
[INFO] [stdout]   --> examples/record_wav.rs:71:4
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn sample_format(format: cpal::SampleFormat) -> hound::SampleFormat {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wav_spec_from_config`
[INFO] [stdout]   --> examples/record_wav.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn wav_spec_from_config(config: &cpal::SupportedStreamConfig) -> hound::WavSpec {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `WavWriterHandle`
[INFO] [stdout]   --> examples/record_wav.rs:88:1
[INFO] [stdout]    |
[INFO] [stdout] 88 | type WavWriterHandle = Arc<Mutex<Option<hound::WavWriter<BufWriter<File>>>>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_input_data`
[INFO] [stdout]   --> examples/record_wav.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn write_input_data<T, U>(input: &[T], writer: &WavWriterHandle)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `LATENCY_MS`
[INFO] [stdout]   --> examples/feedback.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | const LATENCY_MS: f32 = 150.0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> examples/feedback.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `err_fn`
[INFO] [stdout]    --> examples/feedback.rs:128:4
[INFO] [stdout]     |
[INFO] [stdout] 128 | fn err_fn(err: cpal::StreamError) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> examples/beep.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> examples/beep.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error>
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write_data`
[INFO] [stdout]   --> examples/beep.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn write_data<T>(output: &mut [T], channels: usize, next_sample: &mut dyn FnMut() -> f32)
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> examples/enumerate.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:711:20
[INFO] [stdout]     |
[INFO] [stdout] 711 |     stream.channel.io().readi(buffer)?;
[INFO] [stdout]     |                    ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stdout]    --> src/host/alsa/mod.rs:756:30
[INFO] [stdout]     |
[INFO] [stdout] 756 |         match stream.channel.io().writei(buffer) {
[INFO] [stdout]     |                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.82s
[INFO] running `Command { std: "docker" "inspect" "8d0a2b5807eec7b72c15a88543696ff4aa97c8ad2e480ba78a06404f1e61b066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d0a2b5807eec7b72c15a88543696ff4aa97c8ad2e480ba78a06404f1e61b066", kill_on_drop: false }`
[INFO] [stdout] 8d0a2b5807eec7b72c15a88543696ff4aa97c8ad2e480ba78a06404f1e61b066
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4a133250e9f5250436f37d21e1bdb472ee523083d25acc41c2f42e3c3f79fc3a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4a133250e9f5250436f37d21e1bdb472ee523083d25acc41c2f42e3c3f79fc3a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stderr]    --> src/host/alsa/mod.rs:711:20
[INFO] [stderr]     |
[INFO] [stderr] 711 |     stream.channel.io().readi(buffer)?;
[INFO] [stderr]     |                    ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stderr]    --> src/host/alsa/mod.rs:756:30
[INFO] [stderr]     |
[INFO] [stderr] 756 |         match stream.channel.io().writei(buffer) {
[INFO] [stderr]     |                              ^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stderr]    --> src/host/alsa/mod.rs:711:20
[INFO] [stderr]     |
[INFO] [stderr] 711 |     stream.channel.io().readi(buffer)?;
[INFO] [stderr]     |                    ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `host::alsa::alsa::PCM::io`: renamed to io_bytes
[INFO] [stderr]    --> src/host/alsa/mod.rs:756:30
[INFO] [stderr]     |
[INFO] [stderr] 756 |         match stream.channel.io().writei(buffer) {
[INFO] [stderr]     |                              ^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> examples/beep.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn main() {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> examples/beep.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error>
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_data`
[INFO] [stderr]   --> examples/beep.rs:77:4
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn write_data<T>(output: &mut [T], channels: usize, next_sample: &mut dyn FnMut() -> f32)
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> examples/record_wav.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sample_format`
[INFO] [stderr]   --> examples/record_wav.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn sample_format(format: cpal::SampleFormat) -> hound::SampleFormat {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `wav_spec_from_config`
[INFO] [stderr]   --> examples/record_wav.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn wav_spec_from_config(config: &cpal::SupportedStreamConfig) -> hound::WavSpec {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `WavWriterHandle`
[INFO] [stderr]   --> examples/record_wav.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | type WavWriterHandle = Arc<Mutex<Option<hound::WavWriter<BufWriter<File>>>>>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_input_data`
[INFO] [stderr]   --> examples/record_wav.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn write_input_data<T, U>(input: &[T], writer: &WavWriterHandle)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `LATENCY_MS`
[INFO] [stderr]   --> examples/feedback.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | const LATENCY_MS: f32 = 150.0;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> examples/feedback.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `err_fn`
[INFO] [stderr]    --> examples/feedback.rs:128:4
[INFO] [stderr]     |
[INFO] [stderr] 128 | fn err_fn(err: cpal::StreamError) {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> examples/enumerate.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn main() -> Result<(), anyhow::Error> {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/cpal-003bae409ab54e98
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test samples_formats::test::f32_to_f32 ... ok
[INFO] [stdout] test samples_formats::test::i16_to_i16 ... ok
[INFO] [stdout] test samples_formats::test::i16_to_u16 ... ok
[INFO] [stdout] test samples_formats::test::f32_to_u16 ... ok
[INFO] [stdout] test samples_formats::test::i16_to_f32 ... ok
[INFO] [stdout] test samples_formats::test::u16_to_u16 ... ok
[INFO] [stdout] test samples_formats::test::u16_to_f32 ... ok
[INFO] [stdout] test samples_formats::test::u16_to_i16 ... ok
[INFO] [stdout] test samples_formats::test::f32_to_i16 ... ok
[INFO] [stdout] test test_cmp_default_heuristics ... ok
[INFO] [stdout] test test_stream_instant ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cpal
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - (line 131) ... ok
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] test src/lib.rs - (line 58) ... ok
[INFO] [stdout] test src/lib.rs - (line 115) ... ok
[INFO] [stdout] test src/lib.rs - (line 90) ... ok
[INFO] [stdout] test src/lib.rs - (line 45) ... ok
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4a133250e9f5250436f37d21e1bdb472ee523083d25acc41c2f42e3c3f79fc3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a133250e9f5250436f37d21e1bdb472ee523083d25acc41c2f42e3c3f79fc3a", kill_on_drop: false }`
[INFO] [stdout] 4a133250e9f5250436f37d21e1bdb472ee523083d25acc41c2f42e3c3f79fc3a