tree e046712a00e38e94b2a60f5f1a6298ac5eebd460
parent 31bcff8815f263ab25ac9458f7b45975d8ebecbc
author Guido van Rossum <guido@python.org> 999146615 +0000
committer Guido van Rossum <guido@python.org> 999146615 +0000
HG:extra convert_revision:svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/python/branches/legacy-trunk%4022840

Safety measures now that str and tuple are subclassable:

If tp_itemsize of the basetype is nonzero, only allow empty __slots__
(declaring that no __dict__ should be added), and don't add a weakref
offset.