#0  0xa7bc2947 in raise () from /lib/tls/libc.so.6
#1  0xa7bc40c9 in abort () from /lib/tls/libc.so.6
#2  0xa7bf7fda in __fsetlocking () from /lib/tls/libc.so.6
#3  0xa7bff89f in mallopt () from /lib/tls/libc.so.6
#4  0xa7bff942 in free () from /lib/tls/libc.so.6
#5  0xa7e981ee in opbx_frfree (fr=0x98) at frame.c:275
#6  0xa610d80a in rxfax_exec (chan=0x80df400, data=0xa5028fc8) at app_rxfax.c:500
#7  0xa7ebc287 in pbx_exec (c=0x80df400, app=0x80a5c30, data=0xa5028fc8, newstack=1) at pbx.c:604
#8  0xa7ec3380 in pbx_extension_helper (c=0x80df400, con=0x0, context=0x80df5a4 "default", exten=0x80df698 "800",
    priority=5, label=0x0, callerid=0x805ca40 "openpbx", action=1) at pbx.c:1846
#9  0xa7ec4c0b in __opbx_pbx_run (c=0x80df400) at pbx.c:2446
#10 0xa7ec5aca in pbx_thread (data=0x80df400) at pbx.c:2676
#11 0xa7e330bd in start_thread () from /lib/tls/libpthread.so.0
#12 0xa7c658fe in clone () from /lib/tls/libc.so.6