Business Launch Social Post

@@ -3404,6 +3404,14 @@ class C:
 
  c = C('hello')
  self.assertEqual(deepcopy(c), c)
+ def test_frozen_slots_setattr(self):
+ # gh-143969: Ensure frozen+slots uses object.__setattr__
+ @dataclass(frozen=True, slots=True)
+ class A:
+ x: int
+ a = A(1)
+ with self.assertRaisesRegex(FrozenInstanceError, 'cannot assign to field'):
+ a.x = 2
 
 
 class TestSlots(unittest.TestCase):

Sample Blogs For Beginners To Read

@@ -0,0 +1,2 @@
+Fixed a crash in frozen slotted dataclasses where assigning to an attribute
+could raise an internal :exc:`TypeError` instead of failing cleanly.