Use std::addressof to obtain holder address instead of operator&

tests/test_smart_ptr.py

@@ -203,6 +203,50 @@ def test_move_only_holder():
     assert stats.alive() == 0
 
 
+def test_holder_with_addressof_operator():
+    # this test must not throw exception from c++
+    a = m.TypeForHolderWithAddressOf.make()
+    a.print_object_1()
+    a.print_object_2()
+    a.print_object_3()
+    a.print_object_4()
+
+    stats = ConstructorStats.get(m.TypeForHolderWithAddressOf)
+    assert stats.alive() == 1
+
+    np = m.TypeForHolderWithAddressOf.make()
+    assert stats.alive() == 2
+    del a
+    assert stats.alive() == 1
+    del np
+    assert stats.alive() == 0
+
+    b = m.TypeForHolderWithAddressOf.make()
+    c = b
+    assert b.get() is c.get()
+    assert stats.alive() == 1
+
+    del b
+    assert stats.alive() == 1
+
+    del c
+    assert stats.alive() == 0
+
+
+def test_move_only_holder_with_addressof_operator():
+    a = m.TypeForMoveOnlyHolderWithAddressOf.make()
+    a.print_object()
+
+    stats = ConstructorStats.get(m.TypeForMoveOnlyHolderWithAddressOf)
+    assert stats.alive() == 1
+
+    a.value = 42
+    assert a.value == 42
+
+    del a
+    assert stats.alive() == 0
+
+
 def test_smart_ptr_from_default():
     instance = m.HeldByDefaultHolder()
     with pytest.raises(RuntimeError) as excinfo: