./MasterServer(+0x1c3a6)[0x55d2ff2bb3a6]
/usr/lib/libstdc++.so.6(+0xa5c8a)[0x7f4c59992c8a]
/usr/lib/libstdc++.so.6(+0xa5cf7)[0x7f4c59992cf7]
/usr/lib/libstdc++.so.6(+0xa5f8e)[0x7f4c59992f8e]
./MasterServer(+0x126ba)[0x55d2ff2b16ba]
./MasterServer(+0x49777)[0x55d2ff2e8777]
./MasterServer(+0x1ec98)[0x55d2ff2bdc98]
./MasterServer(+0x25090)[0x55d2ff2c4090]
./MasterServer(+0x1f746)[0x55d2ff2be746]
./MasterServer(+0x13a86)[0x55d2ff2b2a86]
Error: signal -1: