From 1f11cf9521114447b3e32e2ac88f075ffaa37555 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Tue, 11 Jun 2019 01:15:24 -0700 Subject: bpo-37219: Remove erroneous optimization for differencing an empty set (GH-13965) --- Lib/test/test_set.py | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Lib/test') diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py index bb1081f034..e4766ab190 100644 --- a/Lib/test/test_set.py +++ b/Lib/test/test_set.py @@ -895,6 +895,12 @@ class TestBasicOps: self.assertEqual(self.set, copy, "%s != %s" % (self.set, copy)) + def test_issue_37219(self): + with self.assertRaises(TypeError): + set().difference(123) + with self.assertRaises(TypeError): + set().difference_update(123) + #------------------------------------------------------------------------------ class TestBasicOpsEmpty(TestBasicOps, unittest.TestCase): -- cgit v1.2.1