no more memory problem in C

test.c

#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>

char *foo2 ()
{
	return "FOO";
}

char *foo1 ()
{
	char *bar = malloc(sizeof(char)*4);
	strcpy(bar, foo2());
	return bar;
}

int main (int argc, char *argv[])
{
	char *str;
	while (1) {
		str = malloc(sizeof(char)*4);
		char *temp = foo1();
		strcpy(str, temp);
		free(temp);
		free(str);
	}
	return 0;
}