The following test currently fails:

    @Test(expectedExceptions = IllegalArgumentException.class,
        expectedExceptionsMessageRegExp = ".*Heap segment not allowed.*")
    public void testNoHeapSets() {
        MemorySegment targetSegment = MemorySegment.allocateNative(ADDRESS.byteSize(), SegmentScope.auto());
        MemorySegment segment = MemorySegment.ofArray(new byte[]{ 0, 1, 2 });
        targetSegment.set(ADDRESS, 0, segment); // should throw
    }

i.e. it is possible to set a heap segment's address into another memory segment. The address of a heap segment is a virtual address, so doing this is non-sensicle.

This should be blocked.