类型错误：无法设置原型：会造成原型链循环
JavaScript 异常“TypeError:无法设置原型：当一个对象的原型被设置为一个对象，使得 原型链 变成循环（a 和 b 在它们的原型链中都有彼此）时，就会导致“原型链循环”。
¥The JavaScript exception "TypeError: can't set prototype: it would cause a prototype chain cycle" occurs when an object's prototype is set to an object such that the prototype chain becomes circular (a and b both have each other in their prototype chains).
信息
错误类型
什么地方出了错？
¥What went wrong?
原型链中引入了循环，也称为循环。这意味着，当走这条原型链时，同一个地方会被一遍又一遍地访问，而不是最终到达 null。
¥A loop, also called a cycle, was introduced in a prototype chain. That means that when walking this prototype chain, the same place would be accessed over and over again, instead of eventually reaching null.
这个错误是在设置原型时抛出的。在像 Object.setPrototypeOf(a, b) 这样的操作中，如果 a 已经存在于 b 的原型链中，就会抛出这个错误。
¥This error is thrown at the time of setting the prototype. In an operation like Object.setPrototypeOf(a, b), if a already exists in the prototype chain of b, this error will be thrown.
示例
¥Examples
const a = {};
Object.setPrototypeOf(a, a);
// TypeError: can't set prototype: it would cause a prototype chain cycle
const a = {};
const b = {};
const c = {};
Object.setPrototypeOf(a, b);
Object.setPrototypeOf(b, c);
Object.setPrototypeOf(c, a);
// TypeError: can't set prototype: it would cause a prototype chain cycle