Bug with strcat

[Ivan Mari]

This code produces an access violation. Commenting out the arr[] it works 
fine. Leaving the arr[]  and commenting out the strcat works too.
Anyway on a Linux with GCC 3.4.2 it works as it is presented here without 
problems

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{

        int arr[] = {1,2,3,4,5};

        char *buf = (char *) malloc (80);
        if (buf == ((void *)0))
                printf("LKD error: Not enough memory\n");

   		int a = 20;

		{char tempBuffer[80];int bsize;snprintf (tempBuffer,80, "Ivan %d", a 
);bsize += strlen(tempBuffer) + 1; buf = (char *) realloc (buf, bsize); 
strcat(buf, tempBuffer);}

return 0;
}

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