output when I run under gdb
(gdb) run
Starting program: /home/ubuntu/Applications/Bitshares/bitshares/programs/client/bitshares_client
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Loading blockchain from: /home/ubuntu/.BitShares/chain
Loading config from file: /home/ubuntu/.BitShares/config.json
[New Thread 0x7ffff638d700 (LWP 1469)]
[New Thread 0x7ffff5b8c700 (LWP 1470)]
[New Thread 0x7ffff538b700 (LWP 1471)]
[New Thread 0x7ffff4b8a700 (LWP 1472)]
[New Thread 0x7fffe7fff700 (LWP 1473)]
[New Thread 0x7fffe77fe700 (LWP 1474)]
[New Thread 0x7fffe6ffd700 (LWP 1475)]
[New Thread 0x7fffcb1e2700 (LWP 1476)]
[New Thread 0x7fffca9e1700 (LWP 1477)]
[New Thread 0x7fffca1e0700 (LWP 1478)]
[New Thread 0x7fffc9996700 (LWP 1479)]
Not starting RPC server, use --server to enable the RPC interface
[New Thread 0x7fffc90d3700 (LWP 1480)]
[New Thread 0x7fffc88d2700 (LWP 1481)]
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6f59e9b in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&) ()
from /usr/lib/x86_64-linux-gnu/libstdc++.so.6