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Issue #23726: Don't enable GC for user subclasses of non-GC types that don't add any new fields.

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Patch by Eugene Toder.
This commit is contained in:
Antoine Pitrou 2015-04-13 20:10:06 +02:00
parent 56452eea39
commit a63cc21234
4 changed files with 27 additions and 5 deletions
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20
Lib/test/test_gc.py
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@ -546,11 +546,31 @@ class GCTests(unittest.TestCase):
class UserClass:
pass
class UserInt(int):
pass
# Base class is object; no extra fields.
class UserClassSlots:
__slots__ = ()
# Base class is fixed size larger than object; no extra fields.
class UserFloatSlots(float):
__slots__ = ()
# Base class is variable size; no extra fields.
class UserIntSlots(int):
__slots__ = ()
self.assertTrue(gc.is_tracked(gc))
self.assertTrue(gc.is_tracked(UserClass))
self.assertTrue(gc.is_tracked(UserClass()))
self.assertTrue(gc.is_tracked(UserInt()))
self.assertTrue(gc.is_tracked([]))
self.assertTrue(gc.is_tracked(set()))
self.assertFalse(gc.is_tracked(UserClassSlots()))
self.assertFalse(gc.is_tracked(UserFloatSlots()))
self.assertFalse(gc.is_tracked(UserIntSlots()))
def test_bug1055820b(self):
# Corresponds to temp2b.py in the bug report.