Description of problem:
no idea what caused this

Version-Release number of selected component:
pnmixer-0.5.1-4.fc18

Additional info:
reporter:       libreport-2.1.6
backtrace_rating: 4
cmdline:        pnmixer
crash_function: __assert_fail_base
executable:     /usr/bin/pnmixer
kernel:         3.10.4-100.fc18.x86_64
runlevel:       N 5
uid:            1000
var_log_messages: Aug 13 22:25:40 localhost6 abrt[3042]: Saved core dump of pid 2953 (/usr/bin/pnmixer) to /var/tmp/abrt/ccpp-2013-08-13-22:25:39-2953 (27385856 bytes)

Truncated backtrace:
Thread no. 1 (9 frames)
 #2 __assert_fail_base at assert.c:92
 #3 __assert_fail at assert.c:101
 #4 snd_hctl_name at hcontrol.c:132
 #5 snd_mixer_detach at mixer.c:254
 #6 close_mixer at alsa.c:195
 #7 get_channels at alsa.c:221
 #8 get_cards at alsa.c:53
 #9 alsaset at alsa.c:244
 #10 alsa_init at alsa.c:350

Potential duplicate: bug 996883