可疑的内存泄漏使用_BEGINTHREAD

所以，我怀疑内存泄漏有一些问题，以便测试我写了这个小代码。通过评论以下行：

printf("Calc index: %dn", ArrLength);

代码运行良好。但是，当我删除它时，该程序在数千个线程后崩溃了。当我使用try/catch时，该程序刚刚在尝试函数中崩溃。谁能在这里帮助我？

#include "stdafx.h"
#include <process.h>
#include <iostream>
#include <mutex>
#include <windows.h>
using namespace std;
typedef struct {
    int StartNode;
    int EndNode;
    int GangID;
    int MemberID;
    int ArrLength;
    int arr[10000];
}t;
t *arg;
mutex m;
void myFunc(void *param) {
    m.lock();
    printf("Calculate thread startedn");
    t *args = (t*)param;
    int StartNode = args->StartNode;
    int EndNode = args->EndNode;
    int GangID = args->GangID;
    int MemberID = args->MemberID;
    int ArrLength = args->ArrLength;
    printf("Calc index: %dn", ArrLength);
    free(args);
    m.unlock();
}
int main()
{
    for (int i = 0; i < 1000000; i++)
    {
        HANDLE handle;
        arg = (t *)malloc(sizeof(t));
        arg->StartNode = 2;
        arg->EndNode = 1;
        arg->GangID = 1;
        arg->MemberID = 1;
        arg->ArrLength = 5;
        for (int j = 0; j < 10000; j++)
        {
            arg->arr[j] = j;
        }
        handle = (HANDLE)_beginthread(myFunc, 0, (void*)arg);
    }
    cin.get();
    return 0;
}