GNU bug report logs - #43677
27.1; Calc holidays off-by-one error, incorrect business day calculation

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: Aaron Zeng <zeng.aaron.l <at> gmail.com>, 43677 <at> debbugs.gnu.org
Subject: bug#43677: 27.1; Calc holidays off-by-one error, incorrect business day calculation
Date: Wed, 30 Sep 2020 15:40:37 +0200

Mattias Engdegård <mattiase <at> acm.org> writes:

> Since the bug is a regression -- it is present in Emacs 26.1 but not
> in 22.1.1 -- it may be a good idea to find out exactly what change
> introduced it, and work from there. That might reduce the risk of
> causing secondary bugs.

That's quite a stretch to be bisecting, though...  What's the best test
function here?

(require 'calc-forms)
(math-from-business-day 526951)
=> (date 737732)

while it should be 737731?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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