C++ delete，为啥连最基本的也会报错嘛

 #include <iostream>

using namespace std;

struct ListNode {
    int val;
    ListNode *next;
    ListNode (int x): val(x), next(NULL) {}
};

int main(int argc, char const *argv[])
{
    // ListNode n1(2);
    // ListNode dummy(0);
    // dummy.next = &n1;
    // ListNode *p = &dummy;
    // delete p;
    int *p = new int;
    int t = 10;
    p = &t;
    delete p;
    return 0;
}

如上所示，刚接触内存分配，百度了好些东西了，不明白为什么连这个最基本的分配和释放都会报错pointer being freed was not allocated，真心求助