Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5e36f7c in std::string::compare(std::string const&) const ()
   from /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/libstdc++.so.6
(gdb) bt
#0  0x00007ffff5e36f7c in std::string::compare(std::string const&) const ()
   from /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/libstdc++.so.6
#1  0x00007ffff7e74102 in operator< <char, std::char_traits<char>, std::allocator<char> > (__rhs=..., __lhs=...)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/basic_string.h:2419
#2  operator() (__y=..., __x=..., this=<optimized out>)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/stl_function.h:230
#3  _M_lower_bound (__k=..., __y=0x7ffff85fc408, __x=0x7ffff86932c0, this=<optimized out>)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/stl_tree.h:1004
#4  lower_bound (__k=..., this=<optimized out>)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/stl_tree.h:763
#5  lower_bound (__x=..., this=0x7ffff85fc400)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/stl_map.h:739
#6  std::map<std::string, std::vector<mongo::HostAndPort, std::allocator<mongo::HostAndPort> >, std::less<std::string>, std::allocator<std::pair<std::string const, std::vector<mongo::HostAndPort, std::allocator<mongo::HostAndPort> > > > >::operator[] (__k=..., this=0x7ffff85fc400)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.4/include/g++-v4/bits/stl_map.h:448
#7  0x00007ffff7e744a8 in mongo::ReplicaSetMonitor::_cacheServerAddresses_inlock (this=0x7ffff8694420)
    at src/mongo/client/dbclient_rs.cpp:260
#8  0x00007ffff7e7be5d in mongo::ReplicaSetMonitor::~ReplicaSetMonitor (this=0x7ffff8694420, 
    __in_chrg=<optimized out>) at src/mongo/client/dbclient_rs.cpp:252