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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 9478d07ee71161a8098da53b4b902899f36bf6ba authored by Guido van Rossum on 07 September 2001, 18:52:13 UTC, committed by Guido van Rossum on 07 September 2001, 18:52:13 UTC 
PyType_IsSubtype(): test tp_flags for HAVE_CLASS bit before accessing
 
a->tp_mro.  If a doesn't have class, it's considered a subclass only
of itself or of 'object'.

This one fix is enough to prevent the ExtensionClass test suite from
dumping core, but that doesn't say much (it's a rather small test
suite).  Also note that for ExtensionClass-defined types, a different
subclass test may be needed.  But I haven't checked whether
PyType_IsSubtype() is actually used in situations where this matters
-- probably it doesn't, since we also don't check for classic classes.
1 parent 317e9f5
History
Tip revision: 9478d07ee71161a8098da53b4b902899f36bf6ba authored by Guido van Rossum on 07 September 2001, 18:52:13 UTC
PyType_IsSubtype(): test tp_flags for HAVE_CLASS bit before accessing
Tip revision: 9478d07
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