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Diffstat (limited to 'Lib/test/test_collections.py')
| -rw-r--r-- | Lib/test/test_collections.py | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py index 2099d23..0b7cb58 100644 --- a/Lib/test/test_collections.py +++ b/Lib/test/test_collections.py @@ -1721,6 +1721,18 @@ class TestCollectionABCs(ABCTestCase): mss.clear() self.assertEqual(len(mss), 0) + # issue 34427 + # extending self should not cause infinite loop + items = 'ABCD' + mss2 = MutableSequenceSubclass() + mss2.extend(items + items) + mss.clear() + mss.extend(items) + mss.extend(mss) + self.assertEqual(len(mss), len(mss2)) + self.assertEqual(list(mss), list(mss2)) + + ################################################################################ ### Counter ################################################################################ |