Debug Assertion Failed：_CrtIsValidHeapPointer（pUserData）C ++

Question

我是C ++的初学者，我尝试编写一个程序，从我最喜欢的连续剧中随机生成一集，或绝对随机，但是当我调试它时，总会出现这个错误。

代码没问题，如果它不在Win32 Form应用程序中，它可以工作。

你能帮我吗？

我的列表项代码：

Void pro::Form1::keres(string sori) {


int k=0;
vector<string> a;
srand (time(NULL));
string desti = "d:\\Filmek\\Sorozatok\\" + sori + "\\*";
WIN32_FIND_DATA search_data;
int s;

memset(&search_data, 0, sizeof(WIN32_FIND_DATA));
HANDLE handle = FindFirstFile(desti.c_str(), &search_data);

while(handle != INVALID_HANDLE_VALUE)
{
    a.push_back(search_data.cFileName);
    k++;
    if(FindNextFile(handle, &search_data) == FALSE)
        break;
}

s = rand() % (k-2);
cout<<a[s+2]<<endl;
desti = "d:\\Filmek\\Sorozatok\\" + sori + "\\" + a[s+2] + "\\*";
handle = FindFirstFile(desti.c_str(), &search_data);
k = 0;

while(handle != INVALID_HANDLE_VALUE)
{
    a.push_back(search_data.cFileName);
    k++;
    if(FindNextFile(handle, &search_data) == FALSE)
        break;
}
s = rand() % (k-2);
string run = "cd " + desti + " & start " + a[s+2];
system(run.c_str());
a.clear();
}

Void pro::Form1::kereses(string film) {

int q=0;
int w=0;
int e=0;

int a;
int s;
int d;

vector<string> y;
vector<string> x;
vector<string> v;
srand (time(NULL));

string desti = "d:\\Filmek\\" + film + "\\*";
WIN32_FIND_DATA search_data;

memset(&search_data, 0, sizeof(WIN32_FIND_DATA));
HANDLE handle = FindFirstFile(desti.c_str(), &search_data);

while(handle != INVALID_HANDLE_VALUE)
{
    y.push_back(search_data.cFileName);
    q++;
    if(FindNextFile(handle, &search_data) == FALSE)
        break;
}

a = rand() % (q-2);
desti = "d:\\Filmek\\" + film +"\\" + y[a+2] + "\\*";
handle = FindFirstFile(desti.c_str(), &search_data);
y.clear();
q = 0;

while(handle != INVALID_HANDLE_VALUE)
{
    x.push_back(search_data.cFileName);
    w++;
    if(FindNextFile(handle, &search_data) == FALSE)
        break;
}

s = rand() % (w-2);
desti = "d:\\Filmek\\" + film +"\\" + y[a+2] + "\\" + x[s+2] + "\\*";
handle = FindFirstFile(desti.c_str(), &search_data);
x.clear();
w = 0;

while(handle != INVALID_HANDLE_VALUE)
{
    v.push_back(search_data.cFileName);
    e++;
    if(FindNextFile(handle, &search_data) == FALSE)
        break;
}
d = rand() % (e-2);
string run = "cd " + desti + " & start " + v[d+2];
system(run.c_str());
v.clear();
e=0;

}