GNU bug report logs - #66696
29.1; "A bug in the function debug."

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Message #17 received at 66696 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Lewis Creary <lewcreary <at> cs.com>
Cc: 66696 <at> debbugs.gnu.org
Subject: Re: bug#66696: 29.1; "A bug in the function debug."
Date: Sun, 05 Nov 2023 07:00:33 +0100

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> Lewis Creary <lewcreary <at> cs.com> writes:
>
> (Please reply to all, so that your mails get to the bug tracker.)
>
>>>> Did you get your parentheses right? The above ')' is the end of the while.
>>
>> I checked, and the extra parenthesis is in my bug report, but not in the code I tried to run.  I'd be interested to know if you can reproduce my
>> problem in emacs lisp, with correct parentheses.
>>
>>    --  Lew Creary
>
> 1:    (while ((and (>= dividend 0) (not stop-sw)))
> 2:       (setq dividend (/ dividend 2)
> 3:             rmdr-list (append (list (% dividend 2)) rmdr-list) )
>
> You write in the bug report that you start with dividend being 5, and
> you expect the first element of the list to be 1, but it is 0.
>
> When you look at line 2, dividend is divided by 2, which results in 5 /
> 2 = 2, because this is integer division.  In line 3, you compute the rest
> of dividend (which is now 2) when divided by 2, which results in 0.
>
> So, this looks correct.

No further reaction expected at this point, so I'm closing this. 

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