pragma solidity ^0.5.6; contract A { mapping (address => uint64 ) private _balances; constructor() public { _balances[0] = 1; _balances[0] = 2; _balances[0] = 3; _balances[0] = 4; } } contract B { mapping (address => uint256) private _balances; constructor() public { _balances[0] = 1; _balances[0] = 2; _balances[0] = 3; _balances[0] = 4; } }
0.5.6