Message 325640 - Python tracker

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Author	p-ganssle
Recipients	belopolsky, davin, lemburg, p-ganssle, serhiy.storchaka, xtreak
Date	2018-09-18.13:19:45
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1537276785.19.0.956365154283.issue31635@psf.upfronthosting.co.za>
In-reply-to

Content
I do think this is an active bug in OpenBSD's ISO calculations, here: https://github.com/openbsd/src/blob/b66614995ab119f75167daaa7755b34001836821/lib/libc/time/wcsftime.c#L326 I re-created this algorithm in Python and at the beginning of the year it gives the wrong answer at the beginning of the year in about 50% of years. I have spent some time trying to understand the way the algorithm is supposed to work, but I don't totally understand what it's doing. I'll report this to OpenBSD.

I do think this is an active bug in OpenBSD's ISO calculations, here: https://github.com/openbsd/src/blob/b66614995ab119f75167daaa7755b34001836821/lib/libc/time/wcsftime.c#L326

I re-created this algorithm in Python and at the beginning of the year it gives the wrong answer at the beginning of the year in about 50% of years. I have spent some time trying to understand the way the algorithm is *supposed* to work, but I don't totally understand what it's doing. I'll report this to OpenBSD.

History
Date	User	Action	Args
2018-09-18 13:19:45	p-ganssle	set	recipients: + p-ganssle, lemburg, belopolsky, serhiy.storchaka, davin, xtreak
2018-09-18 13:19:45	p-ganssle	set	messageid: <1537276785.19.0.956365154283.issue31635@psf.upfronthosting.co.za>
2018-09-18 13:19:45	p-ganssle	link	issue31635 messages
2018-09-18 13:19:45	p-ganssle	create