--- stack trace ---
#0  0x00007f6d27aeba93 in _int_free () from /lib/libc.so.6
#1  0x00007f6d27aebf86 in free () from /lib/libc.so.6
#2  0x00007f6d2325deb0 in pa_pstream_unlink (p=0x19b3b40) at pulsecore/pstream.c:982
	__func__ = "pa_pstream_unlink"
	__PRETTY_FUNCTION__ = "pa_pstream_unlink"
#3  0x00007f6d23238733 in pa_context_set_state (c=0x19af000, st=PA_CONTEXT_TERMINATED) at pulse/context.c:257
	s = (pa_stream *) 0x0
	__func__ = "pa_context_set_state"
	__PRETTY_FUNCTION__ = "pa_context_set_state"
#4  0x00007f6d23482015 in pulse_free (p=0x199fa60) at pulse.c:234
No locals.
#5  0x00007f6d23480dcd in pulse_close (io=<value optimized out>) at pcm_pulse.c:723
	pcm = (snd_pcm_pulse_t *) 0x199f970
	__PRETTY_FUNCTION__ = "pulse_close"
#6  0x00007f6d23713fde in snd_pcm_ioplug_close (pcm=<value optimized out>) at pcm_ioplug.c:744
	io = (ioplug_priv_t *) 0x19b4160
#7  0x00007f6d236d66c5 in snd_pcm_close (pcm=0x19b35f0) at pcm.c:699
	res = 0
	err = <value optimized out>
	__PRETTY_FUNCTION__ = "snd_pcm_close"
#8  0x00007f6d23967071 in outstanding_free (o=0x196b030) at alsa.c:78
	__PRETTY_FUNCTION__ = "outstanding_free"
#9  0x00007f6d23967631 in thread_func (userdata=<value optimized out>) at alsa.c:411
	out = (struct outstanding *) 0x196b030
	ret = 0
	data = (void *) 0x19b6060
	d = <value optimized out>
	fs = 4
	data_size = 16384
	nbytes = 0
	pfd = (struct pollfd *) 0x19698b0
	n_pfd = 2
	p = (struct private *) 0x1969be0
	__PRETTY_FUNCTION__ = "thread_func"
#10 0x00007f6d27de93ea in start_thread () from /lib/libpthread.so.0
#11 0x00007f6d27b56c6d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()
--- thread stack trace ---
.
Thread 3 (process 5902):
#0  0x00007f6d27b64b1e in __lll_lock_wait_private () from /lib/libc.so.6
#1  0x00007f6d27aefb25 in _L_lock_4802 () from /lib/libc.so.6
#2  0x00007f6d27aebf7b in free () from /lib/libc.so.6
#3  0x00007f6d2682b110 in ?? () from /lib/libselinux.so.1
#4  0x00007f6d2681e2ff in ?? () from /lib/libselinux.so.1
#5  0x0000000000000000 in ?? ()
.
Thread 2 (process 5909):
#0  0x00007f6d27de957d in start_thread () from /lib/libpthread.so.0
#1  0x00007f6d2ccc6040 in ?? () from /lib64/ld-linux-x86-64.so.2
#2  0x0000000000000000 in ?? ()
.
Thread 1 (process 5910):
#0  0x00007f6d27aeba93 in _int_free () from /lib/libc.so.6
#1  0x00007f6d27aebf86 in free () from /lib/libc.so.6
#2  0x00007f6d2325deb0 in pa_pstream_unlink (p=0x19b3b40) at pulsecore/pstream.c:982
	__func__ = "pa_pstream_unlink"
	__PRETTY_FUNCTION__ = "pa_pstream_unlink"
#3  0x00007f6d23238733 in pa_context_set_state (c=0x19af000, st=PA_CONTEXT_TERMINATED) at pulse/context.c:257
	s = (pa_stream *) 0x0
	__func__ = "pa_context_set_state"
	__PRETTY_FUNCTION__ = "pa_context_set_state"
#4  0x00007f6d23482015 in pulse_free (p=0x199fa60) at pulse.c:234
No locals.
#5  0x00007f6d23480dcd in pulse_close (io=<value optimized out>) at pcm_pulse.c:723
	pcm = (snd_pcm_pulse_t *) 0x199f970
	__PRETTY_FUNCTION__ = "pulse_close"
#6  0x00007f6d23713fde in snd_pcm_ioplug_close (pcm=<value optimized out>) at pcm_ioplug.c:744
	io = (ioplug_priv_t *) 0x19b4160
#7  0x00007f6d236d66c5 in snd_pcm_close (pcm=0x19b35f0) at pcm.c:699
	res = 0
	err = <value optimized out>
	__PRETTY_FUNCTION__ = "snd_pcm_close"
#8  0x00007f6d23967071 in outstanding_free (o=0x196b030) at alsa.c:78
	__PRETTY_FUNCTION__ = "outstanding_free"
#9  0x00007f6d23967631 in thread_func (userdata=<value optimized out>) at alsa.c:411
	out = (struct outstanding *) 0x196b030
	ret = 0
	data = (void *) 0x19b6060
	d = <value optimized out>
	fs = 4
	data_size = 16384
	nbytes = 0
	pfd = (struct pollfd *) 0x19698b0
	n_pfd = 2
	p = (struct private *) 0x1969be0
	__PRETTY_FUNCTION__ = "thread_func"
#10 0x00007f6d27de93ea in start_thread () from /lib/libpthread.so.0
#11 0x00007f6d27b56c6d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()
--- source code stack trace ---
#0  0x00007f6d27aeba93 in _int_free () from /lib/libc.so.6
#1  0x00007f6d27aebf86 in free () from /lib/libc.so.6
#2  0x00007f6d2325deb0 in pa_pstream_unlink (p=0x19b3b40) at pulsecore/pstream.c:982
  [Error: pulsecore/pstream.c was not found in source tree]
#3  0x00007f6d23238733 in pa_context_set_state (c=0x19af000, st=PA_CONTEXT_TERMINATED) at pulse/context.c:257
  [Error: pulse/context.c was not found in source tree]
#4  0x00007f6d23482015 in pulse_free (p=0x199fa60) at pulse.c:234
  229:     }
  230: 
  231:     ca_mutex_unlock(p->outstanding_mutex);
  232: 
  233:     while (l) {
  234:         out = l;
  235: 
  236:         CA_LLIST_REMOVE(struct outstanding, l, out);
  237: 
  238:         if (out->callback)
  239:             out->callback(c, out->id, CA_SUCCESS, out->userdata);
#5  0x00007f6d23480dcd in pulse_close (io=<value optimized out>) at pcm_pulse.c:723
  [Error: pcm_pulse.c was not found in source tree]
#6  0x00007f6d23713fde in snd_pcm_ioplug_close (pcm=<value optimized out>) at pcm_ioplug.c:744
  [Error: pcm_ioplug.c was not found in source tree]
#7  0x00007f6d236d66c5 in snd_pcm_close (pcm=0x19b35f0) at pcm.c:699
  [Error: pcm.c was not found in source tree]
#8  0x00007f6d23967071 in outstanding_free (o=0x196b030) at alsa.c:78
  73: 
  74:     if (o->file)
  75:         ca_sound_file_close(o->file);
  76: 
  77:     if (o->pcm)
  78:         snd_pcm_close(o->pcm);
  79: 
  80:     ca_free(o);
  81: }
  82: 
  83: int driver_open(ca_context *c) {
#9  0x00007f6d23967631 in thread_func (userdata=<value optimized out>) at alsa.c:411
  406:     CA_LLIST_REMOVE(struct outstanding, p->outstanding, out);
  407: 
  408:     if (!p->outstanding && p->signal_semaphore)
  409:         sem_post(&p->semaphore);
  410: 
  411:     outstanding_free(out);
  412: 
  413:     ca_mutex_unlock(p->outstanding_mutex);
  414: 
  415:     return NULL;
  416: }
#10 0x00007f6d27de93ea in start_thread () from /lib/libpthread.so.0
#11 0x00007f6d27b56c6d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()