Ears call crashes on even runs only

[skligys]

I have very simple code:

let mut sound = Sound::new(sound_ogg_file).unwrap();
sound.play();
while sound.is_playing() {
   sleep(Duration::from_millis(100));
}
sound.stop();

It runs fine the first time (I cancel it with Ctrl+C since it loops and plays other files) but crashes on second, fourth, sixth etc. runs with the error below. Something does not get cleaned up properly on Ctrl+C signal. Any ideas what needs to be cleaned up?

Crash location:

ears/src/internal.rs

Line 50 in 14b6c0b

let device = unsafe { ffi::alcOpenDevice(ptr::null_mut()) };

ALSA lib pcm_dmix.c:1079:(snd_pcm_dmix_open) unable to open slave
AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': File descriptor in bad state
internal error: cannot open the default device.
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', ../src/libcore/option.rs:325
stack backtrace:
   1:     0x5567001175df - std::sys::backtrace::tracing::imp::write::h6528da8103c51ab9
   2:     0x55670011a2bb - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::hbe741a5cc3c49508
   3:     0x556700119f3f - std::panicking::default_hook::he0146e6a74621cb4
   4:     0x55670010ec1e - std::panicking::rust_panic_with_hook::h983af77c1a2e581b
   5:     0x55670011a501 - std::panicking::begin_panic::he426e15a3766089a
   6:     0x55670010faea - std::panicking::begin_panic_fmt::hdddb415186c241e7
   7:     0x55670011a49e - rust_begin_unwind
   8:     0x55670014fe3f - core::panicking::panic_fmt::hf4e16cb7f0d41a25
   9:     0x556700150118 - core::panicking::panic::h907815f47e914305
  10:     0x5566ffff0840 - _<core..option..Option<T>>::unwrap::h40c081deed71d1e9
                        at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/macros.rs:21
  11:     0x5566fffe87e5 - df_ambiance::main::hcebc08599674c5fb
                        at /home/skirmis/Work/DfAmbiance/src/main.rs:296
  12:     0x556700119b78 - std::panicking::try::call::h852b0d5f2eec25e4
  13:     0x55670012403b - __rust_try
  14:     0x556700123fde - __rust_maybe_catch_panic
  15:     0x55670011961e - std::rt::lang_start::hfe4efe1fc39e4a30
  16:     0x5566ffff0ea9 - main
  17:     0x7fb7bca86740 - __libc_start_main
  18:     0x5566fffbb728 - _start
  19:                0x0 - <unknown>
error: Process didn't exit successfully: `target/debug/df_ambiance` (exit code: 101)