https://leetcode.com/problems/reverse-linked-list/ にて、なぜかエラーになる。

error.cpp

/*
下記のようなエラーが出る。
```
Line 173: Char 16: runtime error: reference binding to misaligned address 0xbebebebebebec0b6 for type 'ListNode *', which requires 8 byte alignment (stl_deque.h)
0xbebebebebebec0b6: note: pointer points here
<memory cannot be printed>
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_deque.h:182:16
```
*/
class Solution {
public:
  ListNode* reverseList(ListNode* head) {
    stack<ListNode*> stack;
    while (head) {
      ListNode* preserved_next = head->next;
      head->next = nullptr;
      if (!stack.empty()) {
        head->next = stack.top();
      }
      stack.push(head);
      head = preserved_next;
    }
    return stack.top();


    ListNode* hoge = new ListNode(stack.top()->val, stack.top()->next);
    while (!stack.empty()) {
      stack.pop();
    }

    return hoge;
  }  
};