#0  0x00007f1f84318e5f in __strlen_sse42 () from /lib64/libc.so.6
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3600.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3600.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
#0  0x00007f1f84318e5f in __strlen_sse42 () from /lib64/libc.so.6
No symbol table info available.
#1  0x0000000000475ee9 in ast_bridge_transfer_attended (to_transferee=0x7f1f4d006288, to_transfer_target=0x7f1ed6394fb8) at bridge.c:4591
        __old = 0x0
        __len = 111720689303552
        __new = 0x7f1f23cad410 <__PRETTY_FUNCTION__.40874> "local_attended_transfer"
        to_transferee_bridge = 0x7f1ef1d93ed8
        to_target_bridge = 0x0
        to_transferee_bridge_channel = 0x7f1ee55628c8
        to_target_bridge_channel = 0x0
        channels = 0x7f1ed6180d50
        transferee = 0x7f1ed62d1208
        transfer_msg = 0x7f1ed6479aa8
        the_bridge = 0x7f1ef1d93ed8
        chan_bridged = 0x7f1f4d006288
        chan_unbridged = 0x7f1ed6394fb8
        transfer_prohibited = 0
        do_bridge_transfer = 0
        res = AST_BRIDGE_TRANSFER_SUCCESS
        app = 0x0
        __PRETTY_FUNCTION__ = "ast_bridge_transfer_attended"
#2  0x00007f1f23c5d565 in local_attended_transfer (transferer=0x7f1ef2d2bd78, transferer_chan=0x7f1f4d006288, seqno=3, nounlock=0x7f1f0a1df238) at chan_sip.c:26015
        targetcall_pvt = 0x7f1ed62af578
        targetcall_chan = 0x7f1ed6394fb8
        transfer_res = 32543
        __PRETTY_FUNCTION__ = "local_attended_transfer"
#3  0x00007f1f23c5e403 in handle_request_refer (p=0x7f1ef2d2bd78, req=0x7f1f0a1df320, seqno=3, nounlock=0x7f1f0a1df238) at chan_sip.c:26280
        refer_to = 0x0
        refer_to_context = 0x0
        res = 0
        cb_data = {referred_by = 0x0, domain = 0x0, replaces = 0x0, redirecting = {orig = {name = {str = 0x0, char_set = 0, presentation = 0, valid = 0 '\000'}, number = {str = 0x0, plan = 0, presentation = 0, valid = 0 '\000'}, subaddress = {str = 0x0, type = 0, odd_even_indicator = 0 '\000', valid = 0 '\000'}, tag = 0x0}, from = {name = {str = 0x0, char_set = 169733568, presentation = 32543, valid = 77 'M'}, number = {str = 0x7f1f0a1dedc0 "\001\200\255\373\036\177", plan = 600471507, presentation = 32543, valid = 40 '('}, subaddress = {str = 0xff <Address 0xff out of bounds>, type = 0, odd_even_indicator = 0 '\000', valid = 0 '\000'}, tag = 0x7f1ef2d2c54d "Rx: REFER"}, to = {name = {str = 0x7f1f84254029 <vsnprintf+121> "H\201\303", <incomplete sequence \360>, char_set = -72515583, presentation = 32542, valid = 77 'M'}, number = {str = 0x7f1ef2d2c54d "Rx: REFER", plan = -221067955, presentation = 32542, valid = 77 'M'}, subaddress = {str = 0x7f1ef2d2c556 "", type = -221067700, odd_even_indicator = 30 '\036', valid = 127 '\177'}, tag = 0x7f1ef2d2c54d "Rx: REFER"}, priv_orig = {name = {str = 0x7f1ef2d2c64c "", char_set = 0, presentation = 0, valid = 0 '\000'}, number = {str = 0x0, plan = 0, presentation = 0, valid = 0 '\000'}, subaddress = {str = 0xd63f30a1 <Address 0xd63f30a1 out of bounds>, type = -700501855, odd_even_indicator = 30 '\036', valid = 127 '\177'}, tag = 0x7f1ed63f0000 ""}, priv_from = {name = {str = 0x0, char_set = 0, presentation = 0, valid = 0 '\000'}, number = {str = 0x0, plan = 0, presentation = 0, valid = 0 '\000'}, subaddress = {str = 0x0, type = -1, odd_even_indicator = 0 '\000', valid = 0 '\000'}, tag = 0x0}, priv_to = {name = {str = 0x0, char_set = -2074508224, presentation = 32543, valid = 0 '\000'}, number = {str = 0x0, plan = 218, presentation = 0, valid = 0 '\000'}, subaddress = {str = 0x7f1fffffffff <Address 0x7f1fffffffff out of bounds>, type = 169733888, odd_even_indicator = 31 '\037', valid = 127 '\177'}, tag = 0x7f1f23ca7970 "%-15s %s / %s / %s"}, reason = {str = 0x7f1f84598740 <_IO_str_jumps> "", code = 0}, orig_reason = {str = 0x0, code = -700501855}, count = 169734640}, update_redirecting = {orig = {name = 190 '\276', number = 47 '/', subaddress = 63 '?'}, from = {name = 214 '\326', number = 30 '\036', subaddress = 127 '\177'}, to = {name = 0 '\000', number = 0 '\000', subaddress = 192 '\300'}, priv_orig = {name = 9 '\t', number = 30 '\036', subaddress = 10 '\n'}, priv_from = {name = 31 '\037', number = 127 '\177', subaddress = 0 '\000'}, priv_to = {name = 0 '\000', number = 0 '\000', subaddress = 7 '\a'}}}
        transfer_res = 32543
        transferer = 0x7f1f4d006288
        replaces_str = 0x0
        __PRETTY_FUNCTION__ = "handle_request_refer"
#4  0x00007f1f23c66ec3 in handle_incoming (p=0x7f1ef2d2bd78, req=0x7f1f0a1df320, addr=0x7f1f0a1df290, recount=0x7f1f0a1df23c, nounlock=0x7f1f0a1df238) at chan_sip.c:28124
        cmd = 0x7f1ed63f2fb8 "REFER"
        cseq = 0x7f1ed63f30a1 "3 REFER"
        useragent = 0x7f1ed63f3120 "PolycomSoundPointIP-SPIP_550-UA/4.0.8.1608"
        via = 0x7f1ed63f2fe7 "SIP/2.0/UDP 192.168.0.14;branch=z9hG4bK240ed5ad5F8E6C8D"
        callid = 0x7f1ed63f30b2 "6f51a004385f4d23212f71b249f7d3fd@23.253.109.12:5060"
        via_pos = 2
        seqno = 3
        len = 1
        respid = 169734640
        res = 0
        e = 0x7f1ed63f2fbe "sip:6234@23.253.109.12:5060"
        error = 0
        oldmethod = 6
        acked = 0
        __PRETTY_FUNCTION__ = "handle_incoming"
#5  0x00007f1f23c67902 in handle_request_do (req=0x7f1f0a1df320, addr=0x7f1f0a1df290) at chan_sip.c:28310
        p = 0x7f1ef2d2bd78
        owner_chan_ref = 0x7f1f4d006288
        recount = 0
        nounlock = 1
        __PRETTY_FUNCTION__ = "handle_request_do"
#6  0x00007f1f23c674ff in sipsock_read (id=0x7f1f489e1f70, fd=16, events=1, ignore=0x0) at chan_sip.c:28241
        req = {rlpart1 = 0, rlpart2 = 6, headers = 13, method = 9, lines = 0, sdp_start = 0, sdp_count = 0, debug = 0 '\000', has_to_tag = 1 '\001', ignore = 0 '\000', authenticated = 1 '\001', header = {0, 42, 103, 168, 227, 241, 302, 348, 403, 423, 593, 658, 675, 693, 0 <repeats 50 times>}, line = {693, 0 <repeats 255 times>}, data = 0x7f1ed63f2fa0, content = 0x0, socket = {type = AST_TRANSPORT_UDP, fd = -1, port = 50195, tcptls_session = 0x0, ws_session = 0x0}, next = {next = 0x0}, reqsipoptions = 0}
        addr = {ss = {ss_family = 2, __ss_align = 0, __ss_padding = '\000' <repeats 111 times>}, len = 16}
        res = 708
        readbuf = "REFER sip:6234@23.253.109.12:5060 SIP/2.0\r\nVia: SIP/2.0/UDP 192.168.0.14;branch=z9hG4bK240ed5ad5F8E6C8D\r\nFrom: <sip:6241-FluentStream@192.168.0.14>;tag=5EC7450D-9C93D0AD\r\nTo: \"Lacy Russell\" <sip:6234@"...
        __PRETTY_FUNCTION__ = "sipsock_read"
#7  0x000000000052e161 in ast_io_wait (ioc=0x3264840, howlong=339) at io.c:292
        res = 1
        x = 0
        origcnt = 1
#8  0x00007f1f23c694d6 in do_monitor (data=0x0) at chan_sip.c:28873
        res = 339
        t = 1426524633
        reloading = 0
        __PRETTY_FUNCTION__ = "do_monitor"
#9  0x00000000005ebf1d in dummy_start (data=0xeba0100) at utils.c:1232
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {139771290453760, -3676461472394800417, 0, 139771290454464, 139771290453760, 0, -3676461472403189025, 3658190924299604703}, __mask_was_saved = 0}}, __pad = {0x7f1f0a1dfef0, 0x0, 0x0, 0x0}}
        __cancel_routine = 0x4500ba <ast_unregister_thread>
        __cancel_arg = 0x7f1f0a1e0700
        __not_first_call = 0
        ret = 0x0
        a = {start_routine = 0x7f1f23c692a0 <do_monitor>, data = 0x0, name = 0x3ef44f0 "do_monitor", ' ' <repeats 11 times>, "started at [28906] chan_sip.c restart_monitor()"}
        __PRETTY_FUNCTION__ = "dummy_start"
#10 0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#11 0x00007f1f842d51ad in clone () from /lib64/libc.so.6
No symbol table info available.

Thread 83 (Thread 0x7f1f0bb10700 (LWP 4771)):
#0  0x00007f1f842cabdd in poll () from /lib64/libc.so.6
#1  0x00000000005ec2a0 in ast_wait_for_input (fd=18, ms=-1) at utils.c:1321
#2  0x00000000005d9b85 in ast_tcptls_server_root (data=0x7f1f23ebf080 <sip_tls_desc>) at tcptls.c:705
#3  0x00000000005ebf1d in dummy_start (data=0x3962e10) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 82 (Thread 0x7f1f0bb8c700 (LWP 4770)):
#0  0x00007f1f842cabdd in poll () from /lib64/libc.so.6
#1  0x00000000005ec2a0 in ast_wait_for_input (fd=17, ms=-1) at utils.c:1321
#2  0x00000000005d9b85 in ast_tcptls_server_root (data=0x7f1f23ebee60 <sip_tcp_desc>) at tcptls.c:705
#3  0x00000000005ebf1d in dummy_start (data=0x2cd0840) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 81 (Thread 0x7f1f34a5b700 (LWP 4763)):
#0  0x00007f1f84ff8705 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000535d68 in __ast_cond_wait (filename=0x6e4874 "sched.c", lineno=124, func=0x6e4b50 <__PRETTY_FUNCTION__.12708> "sched_run", cond_name=0x6e4887 "&con->sched_thread->cond", mutex_name=0x6e487c "&con->lock", cond=0x2eb51c8, t=0x30ac880) at lock.c:598
#2  0x00000000005b081c in sched_run (data=0x30ac880) at sched.c:124
#3  0x00000000005ebf1d in dummy_start (data=0x3527ca0) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 80 (Thread 0x7f1f34ad7700 (LWP 4762)):
#0  0x00007f1f84ff8705 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000535d68 in __ast_cond_wait (filename=0x6e4874 "sched.c", lineno=124, func=0x6e4b50 <__PRETTY_FUNCTION__.12708> "sched_run", cond_name=0x6e4887 "&con->sched_thread->cond", mutex_name=0x6e487c "&con->lock", cond=0x31bb8d8, t=0x3303c00) at lock.c:598
#2  0x00000000005b081c in sched_run (data=0x3303c00) at sched.c:124
#3  0x00000000005ebf1d in dummy_start (data=0x34e0a90) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 79 (Thread 0x7f1f47808700 (LWP 4750)):
#0  0x00007f1f84ff8705 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000535d68 in __ast_cond_wait (filename=0x6e4874 "sched.c", lineno=124, func=0x6e4b50 <__PRETTY_FUNCTION__.12708> "sched_run", cond_name=0x6e4887 "&con->sched_thread->cond", mutex_name=0x6e487c "&con->lock", cond=0x31d1c28, t=0x3173ee0) at lock.c:598
#2  0x00000000005b081c in sched_run (data=0x3173ee0) at sched.c:124
#3  0x00000000005ebf1d in dummy_start (data=0x2fb82d0) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 78 (Thread 0x7f1f47900700 (LWP 4748)):
#0  0x00007f1f842cabdd in poll () from /lib64/libc.so.6
#1  0x00000000005ec2a0 in ast_wait_for_input (fd=11, ms=-1) at utils.c:1321
#2  0x00000000005d9b85 in ast_tcptls_server_root (data=0x984c20 <amis_desc>) at tcptls.c:705
#3  0x00000000005ebf1d in dummy_start (data=0x3263480) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6

Thread 77 (Thread 0x7f1f47884700 (LWP 4749)):
#0  0x00007f1f84ffa7c0 in sem_wait () from /lib64/libpthread.so.0
#1  0x00000000005d69c9 in ast_sem_wait (sem=0x2f12a80) at /usr/src/asterisk/asterisk-13.2.0/include/asterisk/sem.h:59
#2  0x00000000005d6a99 in default_tps_processing_function (data=0x335f368) at taskprocessor.c:177
#3  0x00000000005ebf1d in dummy_start (data=0x317d5d0) at utils.c:1232
#4  0x00007f1f84ff4df3 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1f842d51ad in clone () from /lib64/libc.so.6