./MasterServer(+0x1c3a6)[0x55d0119043a6]
/usr/lib/libstdc++.so.6(+0xa5c8a)[0x7f9b90e18c8a]
/usr/lib/libstdc++.so.6(+0xa5cf7)[0x7f9b90e18cf7]
/usr/lib/libstdc++.so.6(+0xa5f8e)[0x7f9b90e18f8e]
./MasterServer(+0x126ba)[0x55d0118fa6ba]
./MasterServer(+0x49777)[0x55d011931777]
./MasterServer(+0x1ec98)[0x55d011906c98]
./MasterServer(+0x25090)[0x55d01190d090]
./MasterServer(+0x1f746)[0x55d011907746]
./MasterServer(+0x13a86)[0x55d0118fba86]
Error: signal -1: