(gdb) bt
#0  0xb7d754ac in free () from /lib/tls/i686/cmov/libc.so.6
#1  0xb7d6df43 in _IO_free_backup_area () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7d6e743 in __underflow () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7d6b18c in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0xb7d6d2a8 in _IO_sgetn () from /lib/tls/i686/cmov/libc.so.6
#5  0xb7d612ee in fread () from /lib/tls/i686/cmov/libc.so.6
#6  0xb790999c in wav_read (s=0x83d1b78, whennext=0xb4ba1454) at format_wav.c:378
#7  0x08094031 in read_frame (s=0xb4b26ff8, whennext=0x0) at file.c:717
#8  0x08094368 in ast_readframe (s=0x83d1b78) at file.c:738
#9  0xb6d15fe8 in moh_files_generator (chan=0xb3a8f500, data=0x82be578, len=160, samples=160) at res_musiconhold.c:274
#10 0x0807818a in ast_read_generator_actions (chan=0xb3a8f500, f=0xb3b66c3c) at channel.c:2014
#11 0x0807f6df in __ast_read (chan=0xb3a8f500, dropaudio=0) at channel.c:2496
#12 0x080bb21c in bridge_p2p_loop (c0=0xb3a8f500, c1=0x81d8f40, p0=0xb3b66c38, p1=0x85f92c8, timeoutms=-1, flags=0, fo=0xb4ba1a2c, rc=0xb4ba1a28, pvt0=0xb3de8be8,
    pvt1=0x865c7a0) at rtp.c:3315
#13 0x080be25a in ast_rtp_bridge (c0=0xb3a8f500, c1=0x81d8f40, flags=0, fo=0xb4ba1a2c, rc=0xb4ba1a28, timeoutms=-1) at rtp.c:3540
#14 0x0808136b in ast_channel_bridge (c0=0xb3a8f500, c1=0x81d8f40, config=0xb4ba2230, fo=0xb4ba1a2c, rc=0xb4ba1a28) at channel.c:4543
#15 0xb7cbea4c in ast_bridge_call (chan=0xb3a8f500, peer=0x81d8f40, config=0xb4ba2230) at res_features.c:1806
#16 0xb51a4d85 in dial_exec_full (chan=0xb3a8f500, data=0xb4ba2e37, peerflags=0xb4ba2de4, continue_exec=0x0) at app_dial.c:1812
#17 0xb51a612d in dial_exec (chan=0xb3a8f500, data=0xb4ba2e37) at app_dial.c:1851
#18 0x080b1307 in pbx_exec (c=0xb3a8f500, app=0xb7863738, data=0xb4ba2e37) at pbx.c:536
#19 0xb6d39b5f in execif_exec (chan=0xb3a8f500, data=0xb4ba5148) at app_exec.c:184
#20 0x080b1307 in pbx_exec (c=0xb3a8f500, app=0xb59aa838, data=0xb4ba5148) at pbx.c:536
#21 0x080b66f3 in pbx_extension_helper (c=0xb3a8f500, con=<value optimized out>, context=0xb3a8f680 "main-functions", exten=0xb3a8f6d0 "*750100", priority=7, label=0x0,
    callerid=0x82df3a0 "%231060244925", action=E_SPAWN) at pbx.c:1863
#22 0x080b79f9 in __ast_pbx_run (c=0xb3a8f500) at pbx.c:2373
#23 0x080b8dfe in pbx_thread (data=0xb3a8f500) at pbx.c:2599
#24 0x080e20a7 in dummy_start (data=0xb6a06720) at utils.c:856
#25 0xb7ec24fb in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#26 0xb7ddce5e in clone () from /lib/tls/i686/cmov/libc.so.6