(gdb) bt
#0  0x0067da63 in decodeMP3 () from /usr/lib/asterisk/modules/format_mp3.so
#1  0x0809ca5e in ast_readframe (s=0xb6df2bf2) at file.c:657
#2  0x00279848 in moh_files_generator (chan=0xb74c0ed8, data=0xb6b2fc48, len=0, samples=160) at res_musiconhold.c:288
#3  0x080824d1 in generator_force (data=0xb74c0ed8) at channel.c:1576
#4  0x080851c3 in __ast_read (chan=0xb74c0ed8, dropaudio=0) at channel.c:2001
#5  0x08088483 in ast_channel_bridge (c0=0xb74c0ed8, c1=0xb6b2fc80, config=0xb6e39cec, fo=0xb6e38e18, rc=0xb6e38e14) at channel.c:2324
#6  0x00da41cd in ast_bridge_call (chan=0xb74c0ed8, peer=0xb6b2fc80, config=0xb6e39cec) at res_features.c:1422
#7  0x00d4f8e8 in dial_exec_full (chan=0xb74c0ed8, data=<value optimized out>, peerflags=0xb6e39db4, continue_exec=0x0) at app_dial.c:1693
#8  0x00d50072 in dial_exec (chan=0xb74c0ed8, data=0xb6e3be28) at app_dial.c:1747
#9  0x080c9a4b in pbx_extension_helper (c=0xb74c0ed8, con=0x0, context=0xb74c1058 "macro-ael-extenroute-handler", exten=0xb74c10a8 "s", priority=21,
    label=0x0, callerid=0xb6b2a6e8 "4085045341", action=E_SPAWN) at pbx.c:537
#10 0x00a6a069 in _macro_exec (chan=0xb74c0ed8, data=<value optimized out>, exclusive=0) at app_macro.c:308
#11 0x080c9a4b in pbx_extension_helper (c=0xb74c0ed8, con=0x0, context=0xb74c1058 "macro-ael-extenroute-handler", exten=0xb74c10a8 "s", priority=79,
    label=0x0, callerid=0xb6b2a6e8 "4085045341", action=E_SPAWN) at pbx.c:537
#12 0x00a6a069 in _macro_exec (chan=0xb74c0ed8, data=<value optimized out>, exclusive=0) at app_macro.c:308
#13 0x080c9a4b in pbx_extension_helper (c=0xb74c0ed8, con=0x0, context=0xb74c1058 "macro-ael-extenroute-handler", exten=0xb74c10a8 "s", priority=1,
    label=0x0, callerid=0xb74a8068 "\210Aw¨\006w\020", action=E_SPAWN) at pbx.c:537
#14 0x080cc0c4 in __ast_pbx_run (c=0xb74c0ed8) at pbx.c:2317
#15 0x080cd15e in pbx_thread (data=0xb74c0ed8) at pbx.c:2634
#16 0x080fb08b in dummy_start (data=0xb7d52db0) at utils.c:865
#17 0x00c9a45b in start_thread () from /lib/libpthread.so.0
#18 0x00b9124e in clone () from /lib/libc.so.6