[issue14095] type_new() removes __qualname__ from the input dictionary
Meador Inge
report at bugs.python.org
Thu Feb 23 21:03:35 CET 2012
Meador Inge <meadori at gmail.com> added the comment:
I can reproduce the segfault on F16:
Python 3.3.0a0 (default:3828d93fd330, Feb 23 2012, 13:49:57)
[GCC 4.4.6] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> d = {'__qualname__':'XXX'}
[66934 refs]
>>> T = type('foo', (), d)
[66956 refs]
>>> T
python: Objects/unicodeobject.c:301: _PyUnicode_CheckConsistency: Assertion `((((((PyObject*)(op))->ob_type))->tp_flags & ((1L<<28))) != 0)' failed.
Aborted (core dumped)
The patch looks mostly OK, but I can still segfault the interpreter by using a '__qualname__' of 'None':
Python 3.3.0a0 (default:3828d93fd330+, Feb 23 2012, 13:55:57)
[GCC 4.4.6] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> d = {'__qualname__':'XXX'}
[67128 refs]
>>> T = type('foo', (), d)
[67156 refs]
>>> T
<class '__main__.XXX'>
[67161 refs]
>>> d = {'__qualname__': None}
[67161 refs]
>>> T = type('foo', (), d)
[67185 refs]
>>> T
python: Objects/unicodeobject.c:301: _PyUnicode_CheckConsistency: Assertion `((((((PyObject*)(op))->ob_type))->tp_flags & ((1L<<28))) != 0)' failed.
Aborted (core dumped)
Try this additional unit test:
d = {'__qualname__': None}
tp = type('foo', (), d)
self.assertEqual(tp.__qualname__, None)
self.assertEqual(tp.__dict__['__qualname__'], None)
self.assertEqual(d, {'__qualname__': None})
self.assertTrue(repr(tp))
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<http://bugs.python.org/issue14095>
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