(gdb)
#0  0x00007fa3a1c56fb5 in raise () from /lib/libc.so.6
#1  0x00007fa3a1c58bc3 in abort () from /lib/libc.so.6
#2  0x00007fa3a1c96228 in ?? () from /lib/libc.so.6
#3  0x00007fa3a1c9bcb8 in ?? () from /lib/libc.so.6
#4  0x00007fa3a1c9e276 in free () from /lib/libc.so.6
#5  0x00007fa390017243 in isup_free_call (ss7=0x270d9e0, c=0x7fa39c521ab0) at isup.c:2224
#6  0x00007fa39001a353 in isup_rlc (ss7=0x270d9e0, c=0x7fa39c521ab0) at isup.c:3259
#7  0x00007fa3906bd185 in ss7_linkset (data=0x7fa3908d6520) at chan_dahdi.c:10121
#8  0x00000000004ed84c in dummy_start (data=<value optimized out>) at utils.c:861
#9  0x00007fa3a180b3ba in start_thread () from /lib/libpthread.so.0
#10 0x00007fa3a1d09fcd in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()
(gdb) bt full
#0  0x00007fa3a1c56fb5 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0x00007fa3a1c58bc3 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x00007fa3a1c96228 in ?? () from /lib/libc.so.6
No symbol table info available.
#3  0x00007fa3a1c9bcb8 in ?? () from /lib/libc.so.6
No symbol table info available.
#4  0x00007fa3a1c9e276 in free () from /lib/libc.so.6
No symbol table info available.
#5  0x00007fa390017243 in isup_free_call (ss7=0x270d9e0, c=0x7fa39c521ab0) at isup.c:2224
        cur = (struct isup_call *) 0x0
        prev = (struct isup_call *) 0x7fa37c019260
        winner = (struct isup_call *) 0x0
#6  0x00007fa39001a353 in isup_rlc (ss7=0x270d9e0, c=0x7fa39c521ab0) at isup.c:3259
        res = 0
#7  0x00007fa3906bd185 in ss7_linkset (data=0x7fa3908d6520) at chan_dahdi.c:10121
        res = <value optimized out>
        i = 2
        next = <value optimized out>
        ss7 = (struct ss7 *) 0x270d9e0
        e = (ss7_event *) 0x270f448
        p = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        chanpos = <value optimized out>
        pollers = {{fd = 17, events = 7, revents = 5}, {fd = 18, events = 7, revents = 5}, {fd = 0, events = 0, revents = 0}, {fd = 24,
    events = 0, revents = 0}}
        cic = <value optimized out>
        dpc = <value optimized out>
        nextms = 44861
        __PRETTY_FUNCTION__ = "ss7_linkset"
#8  0x00000000004ed84c in dummy_start (data=<value optimized out>) at utils.c:861
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {37853104, 9041651841850724305, 0, 0, 140340782227520, 140736053368400,
        -9062009414245625903, 9041652381672067025}, __mask_was_saved = 0}}, __pad = {0x7fa39000a1b0, 0x0, 0x0, 0x0}}
        not_first_call = <value optimized out>
        ret = <value optimized out>
#9  0x00007fa3a180b3ba in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#10 0x00007fa3a1d09fcd in clone () from /lib/libc.so.6
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.