我目前正在尝试ECMA6类。我当前的课程如下

class Player {
  constructor(id) {
    this.id = id;
    this.cash = 350;
  }

  get cash() {
    return this.cash;
  }

  set cash(value) { // line 19
    this.cash = value; // line 20
  }
};

当我现在通过调用创建新对象时，let playerObject = new Player(1);出现以下错误

...\node_modules\mysql\lib\protocol\Parser.js:82
        throw err;
              ^
RangeError: Maximum call stack size exceeded
    at Player.cash (player.js:19:11)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
    at Player.cash (player.js:20:15)
Press enter to exit

这与mysql库有什么关系？为什么同一行中的错误多次出现？我只叫一次。