$ build/cli/anna-cli conf/anna-config.yml
kvs> GET_CAUSAL doesnotexist
Segmentation fault
kvs> GET_CAUSAL q
Thread 1 "anna-cli" received signal SIGSEGV, Segmentation fault.
0x000055555556bc3b in handle_request(KvsClientInterface*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) ()
(gdb) bt
#0 0x000055555556bc3b in handle_request(KvsClientInterface*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) ()
#1 0x000055555556d27a in run(KvsClientInterface*) ()
#2 0x0000555555569f41 in main ()
