// May lead to unexpected result.
const array = [];
const object = {};

const a = {
	[array]: 1,
	[object]() {}
};

class A {
	[array]: 1
	[object]() {}
}

// `4n` is used as `4` not `'4n'`
const array = [];
array[4n] = '';
// array.length === 5

const a = {
  1.00000000000000001: 1
};

const a = {
  1234567891012345678910: 1
};

const array = [];
const object = {};

const a = {
	[array.join('')]: 1,
	[toString(object)]: 2
};

const array = [];
array[Number(4n)] = '';

const symbol = Symbol("key")
const a = {
	[symbol]: 1
};