#0  ast_rtcp_read (rtp=0x0) at rtp.c:345
345             if (!rtp->rtcp)
(gdb) bt
#0  ast_rtcp_read (rtp=0x0) at rtp.c:345
#1  0x0051fac6 in sip_rtp_read (ast=0x0, p=0xb5b22b30) at chan_sip.c:2218
#2  0x0051dd99 in sip_read (ast=0xb62e9978) at chan_sip.c:2251
#3  0x0805cea5 in ast_read (chan=0xb62e9978) at channel.c:1307
#4  0x0806069c in ast_channel_bridge (c0=0xb62e9978, c1=0x88b21f0,
    config=0x48181d0, fo=0x4817920, rc=0x4817924) at channel.c:2670
#5  0x00593895 in ast_bridge_call (chan=0xb62e9978, peer=0x88b21f0,
    config=0x48181d0) at res_features.c:366
#6  0x0094aa72 in dial_exec (chan=0xb62e9978, data=0x48181d0)
    at app_dial.c:1028
#7  0x08075086 in pbx_exec (c=0xb62e9978, app=0x878df30, data=0x481a700,
    newstack=1) at pbx.c:471
#8  0x0807d53f in pbx_extension_helper (c=0xb62e9978,
    context=0xb62e9ad0 "longdistance", exten=0xb62e9978 "SIP/5672613600-b893",
    priority=1, callerid=0xb621c7f0 "\"*removed*\" <removed>\"",
    action=-1238459452) at pbx.c:1290
#9  0x0807713a in ast_pbx_run (c=0xb62e9978) at pbx.c:1772
#10 0x0807dc51 in pbx_thread (data=0x0) at pbx.c:1995
#11 0x0067bde8 in start_thread () from /lib/tls/libpthread.so.0
#12 0x002f893a in clone () from /lib/tls/libc.so.6
(gdb)