在力扣答题中的报错提示

Question

在力扣中使用reverse 提示 reverse not a function 于是用了下面的方法反转数组，但是还是报错

var addTwoNumbers = function (l1, l2) {
      let arr1 = []
      debugger
      for (let i = l1.length; i > 0; i--) {
        arr1.push(l1[i - 1])
      }
      let arr2 = []
      for (let j = l2.length; j > 0; j--) {
        arr2.push(l2[j - 1])
      }
      let a = Number(arr1.join(''))
      let b = Number(arr2.join(''))
      let c = a + b
      let d = c.toString().split('').reverse()
      return d.map(Number)
    }
    console.log(addTwoNumbers([2, 4, 3], [5, 6, 4]))

报错

Line 44 in solution.js
             throw new TypeError(__serialize__(ret) + " is not valid value for the expected return type ListNode");
             ^
TypeError: [0] is not valid value for the expected return type ListNode
    Line 44: Char 20 in solution.js (Object.<anonymous>)
    Line 16: Char 8 in runner.js (Object.runner)
    Line 28: Char 26 in solution.js (Object.<anonymous>)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:17:47

我想要达到的结果

Answer 1

题目在哪？从代码上看是不会报错的