crash log:

#0  0x00aeb977 in __gnu_cxx::__pool<true>::_M_get_thread_id () from /usr/lib/libstdc++.so.6
#1  0x00aebe0c in __gnu_cxx::__pool<true>::_M_reclaim_block () from /usr/lib/libstdc++.so.6
#2  0x00b3627d in std::string::_Rep::_S_create () from /usr/lib/libstdc++.so.6
#3  0x00b3a25f in std::operator+<char, std::char_traits<char>, std::allocator<char> > () from /usr/lib/libstdc++.so.6
#4  0x00b3ae7c in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string ()
   from /usr/lib/libstdc++.so.6
#5  0x003dd6aa in PFactory<PURLScheme, PString>::GetInstance () at /root/pwlib_Mimas_patch2/include/ptlib/pfactory.h:326
#6  0x003dd8ae in PFactory<PURLScheme, PString>::CreateInstance (key=@0xb31f34cc)
    at /root/pwlib_Mimas_patch2/include/ptlib/pfactory.h:288
#7  0x003d7987 in PURL::InternalParse (this=0xb31f397c, cstr=0xabbdd70 "123456@192.168.1.4:1720", defaultScheme=0x16b0b7f "h323")
    at ../../ptclib/http.cxx:711
#8  0x015710aa in PURL::Parse (this=0xb31f397c, str=@0xb31f3b5c, defaultScheme=0x16b0b7f "h323")
    at /root/pwlib_Mimas_patch2/include/ptclib/url.h:219
#9  0x003d2b6c in PURL (this=0xb31f397c, str=@0xb31f3b5c, defaultScheme=0x16b0b7f "h323") at ../../ptclib/http.cxx:520
#10 0x0156d601 in H323EndPoint::ParsePartyName (this=0x99cc770, _remoteParty=@0xb31f3f00, alias=@0xb31f3dc0, address=@0xb31f3dac)
    at h323ep.cxx:1614
#11 0x0156f3b4 in H323EndPoint::InternalMakeCall (this=0x99cc770, trasferFromToken=@0xb31f3e9c, callIdentity=@0xb31f3e88, 
    capabilityLevel=4294967295, remoteParty=@0xb31f3f00, transport=0x0, newToken=@0xb31f3f94, userData=0x9d6ec18)
    at h323ep.cxx:1441
#12 0x01564bc2 in H323EndPoint::MakeCallLocked (this=0x99cc770, remoteParty=@0xb31f3f00, token=@0xb31f3f94, userData=0x9d6ec18, 
---Type <return> to continue, or q <return> to quit---
    transport=0x0) at h323ep.cxx:1425
#13 0x00679a8b in MyH323EndPoint::MakeCall (this=0x99cc770, dest=@0xb31f3f80, token=@0xb31f3f94, callReference=0x9d6ecec, 
    opts=0x9d6ec18) at ast_h323.cxx:324
#14 0x0067f949 in h323_make_call (dest=0xb31f400c "123456@192.168.1.4:1720", cd=0x9d6ecec, call_options=0x9d6ec18)
    at ast_h323.cxx:1379
#15 0x006727e3 in oh323_call (c=0x9e4b084, dest=0xb31f4df8 "123456@192.168.1.4/69601007", timeout=0) at chan_h323.c:433
#16 0x0806ea1d in ast_call (chan=0x9e4b084, addr=0x0, timeout=0) at channel.c:2554
#17 0x00e6ce4a in dial_exec_full (chan=0xb7279cdc, data=0xb31f8fc8, peerflags=0xb31f4f08) at app_dial.c:1121
#18 0x00e722cc in dial_exec (chan=0x0, data=0xb8c420) at app_dial.c:1619
#19 0x080a6504 in pbx_extension_helper (c=0xb7279cdc, con=Variable "con" is not available.
) at pbx.c:553
#20 0x080a7a68 in __ast_pbx_run (c=0xb7279cdc) at pbx.c:2227
#21 0x080a88dd in pbx_thread (data=0x0) at pbx.c:2514
#22 0x00a7bb80 in start_thread () from /lib/libpthread.so.0
#23 0x009d3dee in clone () from /lib/libc.so.6