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Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status)

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From Cameron Simpson <cs@zip.com.au>
Newsgroups comp.lang.python
Subject Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status)
Date Tue, 22 Dec 2015 14:36:22 +1100
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On 22Dec2015 10:14, Steven D'Aprano <steve@pearwood.info> wrote:
>On Tue, 22 Dec 2015 08:44 am, Jon Ribbens wrote about mail clients that use
>the Subject line to thread messages:
>
>> Also: Thunderbird, The Bat!, Eudora, Gnus, Outlook, Outlook Express,
>> Pegasus Mail, Pine, Apple Mail, Windows Live Mail, Yahoo Mail,
>> Evolution, SquirrelMail, KMail, Windows Mail, etc.
>
>I understand that at least some of those will only use the Subject as a
>fallback when other threading information is not available. That's a
>reasonable strategy to take.
>
>As for mail clients that *always* and *exclusively* use the subject line to
>implement threading, they are horrifically broken.

A big +1 here. Even as big as +2.

>It is completely
>unreasonable to insist that people using non-broken tools must change their
>habits to support those with completely broken tools.
>
>So as far as I am concerned, if changes of subject line breaks threading for
>you, so sad, too bad. Go without threading or use a better mail client.
[...snip...]

Besides, changing the Subject line is _supposed_ to break the threading in 
these contexts: such clients clearly consider the discussion topic (subject) as 
sufficient definition of a thread, and changing the topic should imply a new 
thread to such simplistic clients.

Cheers,
Cameron Simpson <cs@zip.com.au>

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Thread

How to ignore error with anon-zero exit status Ganesh Pal <ganesh1pal@gmail.com> - 2015-12-20 23:00 +0530
  Ignore error with non-zero exit status (was: How to ignore error with anon-zero exit status) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-20 22:22 +0100
    Re: Ignore error with non-zero exit status (was: How to ignore error with anon-zero exit status) Chris Angelico <rosuav@gmail.com> - 2015-12-21 08:56 +1100
      Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-20 23:46 +0100
        Re: Ignore error with non-zero exit status Chris Angelico <rosuav@gmail.com> - 2015-12-21 10:09 +1100
          Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 08:51 +0100
            Re: Ignore error with non-zero exit status Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-12-21 12:58 +0000
              Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 14:19 +0100
                Re: Ignore error with non-zero exit status Chris Angelico <rosuav@gmail.com> - 2015-12-22 00:23 +1100
                Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 15:05 +0100
                Re: Ignore error with non-zero exit status Chris Angelico <rosuav@gmail.com> - 2015-12-22 01:11 +1100
                Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 15:19 +0100
                Re: Ignore error with non-zero exit status Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-12-21 16:07 +0000
                Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 23:30 +0100
                Re: Ignore error with non-zero exit status Random832 <random832@fastmail.com> - 2015-12-21 11:30 -0500
                Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 23:27 +0100
                Re: Ignore error with non-zero exit status Steven D'Aprano <steve@pearwood.info> - 2015-12-22 10:32 +1100
                Re: Ignore error with non-zero exit status Terry Reedy <tjreedy@udel.edu> - 2015-12-21 18:53 -0500
                Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-22 13:17 +0100
                Re: Ignore error with non-zero exit status Chris Angelico <rosuav@gmail.com> - 2015-12-22 11:05 +1100
                Re: Ignore error with non-zero exit status Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-21 17:17 -0700
                Re: Ignore error with non-zero exit status Chris Angelico <rosuav@gmail.com> - 2015-12-22 11:25 +1100
        Re: Ignore error with non-zero exit status Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-21 13:30 -0700
        Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Ben Finney <ben+python@benfinney.id.au> - 2015-12-22 07:58 +1100
        Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-21 14:16 -0700
          Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-12-21 21:44 +0000
            Re: Meaning and purpose of the Subject field Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 23:55 +0100
            Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Steven D'Aprano <steve@pearwood.info> - 2015-12-22 10:14 +1100
              Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2015-12-21 23:24 +0000
                Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-21 16:57 -0700
                Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Tim Chase <python.list@tim.thechases.com> - 2015-12-22 09:56 -0600
              Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Cameron Simpson <cs@zip.com.au> - 2015-12-22 14:36 +1100
              Re: Meaning and purpose of the Subject field Random832 <random832@fastmail.com> - 2015-12-21 23:22 -0500
                Re: Meaning and purpose of the Subject field Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-22 13:26 +0100
              Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Grant Edwards <invalid@invalid.invalid> - 2015-12-22 15:17 +0000
                Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-22 08:28 -0700
                Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Grant Edwards <invalid@invalid.invalid> - 2015-12-22 22:32 +0000
        Re: Meaning and purpose of the Subject field (was: Ignore error with non-zero exit status) Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-12-21 16:55 -0500
    Re: Ignore error with non-zero exit status (was: How to ignore error with anon-zero exit status) Ganesh Pal <ganesh1pal@gmail.com> - 2015-12-21 08:22 +0530
      Re: Ignore error with non-zero exit status Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-12-21 08:54 +0100

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