ffmpeg_g -f oss -i dev dsp test wav gdb bt 0xb7cbb137 in raise from li

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./ffmpeg_g -f oss -i /dev/dsp test.wav
...
(gdb) bt
#0 0xb7cbb137 in raise () from /lib/libc.so.6
#1 0xb7cbc85a in abort () from /lib/libc.so.6
#2 0xb7cf56b5 in fabs () from /lib/libc.so.6
#3 0xb7cfb3ea in fabs () from /lib/libc.so.6
#4 0xb7cfc8c0 in fabs () from /lib/libc.so.6
#5 0xb7cff29d in free () from /lib/libc.so.6
#6 0x080619ec in av_open_input_stream (ic_ptr=0xbfb7d92c, pb=0x0, filename=0xbfb7e064 "/dev/dsp", fmt=0x8663520, ap=0xbfb7d8fc)
at libavformat/utils.c:418
#7 0x08063e59 in av_open_input_file (ic_ptr=0xbfb7d92c, filename=0xbfb7e064 "/dev/dsp", fmt=0x8663520, buf_size=0,
ap=0xbfb7d8fc) at libavformat/utils.c:494
#8 0x080509b6 in opt_input_file (filename=0xbfb7e064 "/dev/dsp") at ffmpeg.c:2865
#9 0x08057991 in parse_options (argc=6, argv=0xbfb7db64, options=0x8541700, parse_arg_function=0x8050fa0 <opt_output_file>)
at cmdutils.c:172
#10 0x08054e62 in main (argc=6, argv=0xbfb7db64) at ffmpeg.c:3960
(gdb)