Message 380797 - Python tracker

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Author	gvanrossum
Recipients	BTaskaya, emma_smith, glyph, gvanrossum, mental, ryansobol
Date	2020-11-11.23:50:40
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1605138640.56.0.529985579301.issue41987@roundup.psfhosted.org>
In-reply-to

Content
I spent some time debugging this looking for the root cause. I think it looks like the recursion check in ForwardRef._evaluate() fails to trigger. At some point recursive_guard is a frozen set containing "'Integer'" (i.e. a string whose first and last character are single quotes, while self.__forward_arg__ is 'Integer' (i.e. a string that does not contain quotes). I'm running out of time for the rest of the investigation, so feel free to confirm this and go down the rabbit hole from there...

I spent some time debugging this looking for the root cause.

I think it looks like the recursion check in ForwardRef._evaluate() fails to trigger.  At some point recursive_guard is a frozen set containing "'Integer'" (i.e. a string whose first and last character are single quotes, while self.__forward_arg__ is 'Integer' (i.e. a string that does not contain quotes).

I'm running out of time for the rest of the investigation, so feel free to confirm this and go down the rabbit hole from there...

History
Date	User	Action	Args
2020-11-11 23:50:40	gvanrossum	set	recipients: + gvanrossum, glyph, emma_smith, BTaskaya, mental, ryansobol
2020-11-11 23:50:40	gvanrossum	set	messageid: <1605138640.56.0.529985579301.issue41987@roundup.psfhosted.org>
2020-11-11 23:50:40	gvanrossum	link	issue41987 messages
2020-11-11 23:50:40	gvanrossum	create