Message 345347 - Python tracker

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Author	jdemeyer
Recipients	jdemeyer, petr.viktorin, scoder, vstinner
Date	2019-06-12.13:31:05
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1560346265.69.0.13493999676.issue37250@roundup.psfhosted.org>
In-reply-to

Content
> I understand that tp_vectorcall_offset=0 is fine and the expected value for a type which doesn't have the flag _Py_TPFLAGS_HAVE_VECTORCALL. Not necessarily. There are subtleties involved when subclassing: there are cases where tp_vectorcall_offset needs to be non-zero despite _Py_TPFLAGS_HAVE_VECTORCALL not being set. See also PR 13858.

> I understand that tp_vectorcall_offset=0 is fine and the expected value for a type which doesn't have the flag _Py_TPFLAGS_HAVE_VECTORCALL.

Not necessarily. There are subtleties involved when subclassing: there are cases where tp_vectorcall_offset needs to be non-zero despite _Py_TPFLAGS_HAVE_VECTORCALL not being set. See also PR 13858.

History
Date	User	Action	Args
2019-06-12 13:31:05	jdemeyer	set	recipients: + jdemeyer, scoder, vstinner, petr.viktorin
2019-06-12 13:31:05	jdemeyer	set	messageid: <1560346265.69.0.13493999676.issue37250@roundup.psfhosted.org>
2019-06-12 13:31:05	jdemeyer	link	issue37250 messages
2019-06-12 13:31:05	jdemeyer	create