Bug #65629 for Scalar-List-Utils: Failure to properly lexicalize $a and $b in pairwise, reduce

Thu Feb 10 16:26:25 2011 ether [...] cpan.org - Ticket created

Subject:

Failure to properly lexicalize $a and $b in pairwise, reduce

Using $a and $b in pairwise() or reduce() generates "Name "main::a" used only once possible typo" warnings. This article describes the issue in more detail: http://stackoverflow.com/questions/1490505/how-do-i-prevent-listmoreutils-from-warning-about-using-a-and-b-only-once

Thu Feb 10 16:54:33 2011 GBARR [...] CPAN.ORG - Correspondence added

This is not something that can be fixed in the List::Util module perl itself gets around this with sort because it does exceptions in the lexer. this is not something that ordinary modules have access to. The user of reduce should use our($a,$b) to silence these warnings

Thu Feb 10 16:54:34 2011 The RT System itself - Status changed from 'new' to 'open'

Thu Feb 10 16:54:34 2011 GBARR [...] CPAN.ORG - Status changed from 'open' to 'rejected'

Thu Feb 10 23:13:34 2011 ether [...] cpan.org - Correspondence added

Subject:	Re: [rt.cpan.org #65629] Failure to properly lexicalize $a and $b in pairwise, reduce
Date:	Thu, 10 Feb 2011 14:16:19 -0800
To:	Graham_Barr via RT <bug-Scalar-List-Utils [...] rt.cpan.org>
From:	Karen Etheridge <ether [...] cpan.org>

Hmm ok. I suppose this is why other modules that simulate sort() or other methods use $_[0] and $_[1] in their subs rather than $a, $b. :) On Thu, Feb 10, 2011 at 04:54:33PM -0500, Graham_Barr via RT wrote: Show quoted text

> <URL: https://rt.cpan.org/Ticket/Display.html?id=65629 > > > This is not something that can be fixed in the List::Util module > > > perl itself gets around this with sort because it does exceptions in the lexer. this is not > something that ordinary modules have access to. > > The user of reduce should use our($a,$b) to silence these warnings

Thu Feb 10 23:13:34 2011 The RT System itself - Status changed from 'rejected' to 'open'

Mon Jul 08 02:28:58 2013 ribasushi [...] leporine.io - Correspondence added

Ether, you should be able to re-close this bug (it got auto-opened)

Mon Jul 08 12:33:58 2013 ether [...] cpan.org - Status changed from 'open' to 'rejected'