Write to Unallocated Memory (wua)

Problem: Attempt to write to nonexistent, unallocated, or unmapped memory.
Possible causes: A stray pointer, overflowing the bounds of a heap block, or accessing a heap block that has already been freed.
		char *a = (char *)malloc(1);
		a[1] = `\0';					/* Write to unallocated memory (wua) */