* bug#28477: 25.2; Gnus threading sometimes erratic
@ 2017-09-17 5:16 N. Jackson
2017-09-17 5:38 ` N. Jackson
2018-04-11 21:45 ` Lars Ingebrigtsen
0 siblings, 2 replies; 3+ messages in thread
From: N. Jackson @ 2017-09-17 5:16 UTC (permalink / raw)
To: 28477
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Sometimes when threading is enabled, Gnus displays the messages in
a thread in a bizarre order in the *Summary* buffer, with an older
message shown as a reply to a newer message. This cannot be right
unless the author of one of the messages has a time machine.
Attached are two screen shots showing this problem, one with a
thread from the Emacs development list and one with a thread from
this list.
I would estimate that the frequency of the problem is about once
in around 1000 messages.
The problem isn't new, but I do not think it has always happened.
It's been happening for maybe a year or two I think.
I have the following settings for threading:
(setq gnus-article-sort-functions '((not gnus-article-sort-by-number)))
(setq gnus-thread-sort-functions '((not gnus-thread-sort-by-most-recent-number)))
(setq gnus-subthread-sort-functions '((not gnus-thread-sort-by-most-recent-number)))
. Changing these to:
(setq gnus-article-sort-functions '((not gnus-article-sort-by-date)))
(setq gnus-thread-sort-functions '((not gnus-thread-sort-by-most-recent-date)))
(setq gnus-subthread-sort-functions '((not gnus-thread-sort-by-most-recent-date)))
does not solve the problem.
I thought perhaps that the `gnus-sort-gathered-threads-function'
might be the solution here, but so far I have had no success with
it. If I try to do
(setq gnus-sort-gathered-threads-function '((not gnus-thread-sort-by-date)))
, when the *Summary* buffer opens I get the error message
sort: Invalid function: ((not gnus-thread-sort-by-date))
.
It almost seems that "a list containing functions and ‘(not
some-function)’ elements" is not supported here?
To try to work around this, I tried
(defun nlj-thread-sort-by-date-descending (h1 h2)
"Sort threads in the opposite order to `gnus-thread-sort-by-date'."
(not (gnus-thread-sort-by-date h1 h2)))
(setq gnus-sort-gathered-threads-function 'nlj-thread-sort-by-date-descending)
which avoids the error message but produces an outlandish sorting
order.
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In GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.11)
of 2017-04-26 built on moondust.localdomain
Windowing system distributor 'Fedora Project', version 11.0.11903000
System Description: Fedora release 25 (Twenty Five)
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY ACL
LIBSELINUX GNUTLS LIBXML2 FREETYPE LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11
Important settings:
value of $LANG: en_CA.UTF-8
value of $XMODIFIERS: @im=none
locale-coding-system: utf-8-unix
Major mode: Text
Minor modes in effect:
TeX-PDF-mode: t
csv-field-index-mode: t
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pdf-occur-global-minor-mode: t
shell-dirtrack-mode: t
recentf-mode: t
display-battery-mode: t
display-time-mode: t
show-paren-mode: t
savehist-mode: t
save-place-mode: t
electric-pair-mode: t
desktop-save-mode: t
delete-selection-mode: t
cua-mode: t
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
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Recent messages:
20170917T005607.066> Generating summary...done
Mark set [2 times]
Auto-saving...done
Mark set [2 times]
Auto-saving...done
Mark set
next-line: End of buffer [2 times]
Auto-saving...done
Mark set [3 times]
Auto-saving...
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org-macro org-footnote org-pcomplete org-list org-faces org-entities
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calc-trail calc-ext calc calc-loaddefs calc-macs ob-awk ob-dot ob-maxima
ob-latex ob-emacs-lisp ob ob-tangle org-src ob-ref ob-lob ob-table
ob-keys ob-exp ob-comint comint ansi-color ring ob-core ob-eval
org-compat org-macs org-loaddefs format-spec find-func bbdb-anniv
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mailabbrev bbdb bbdb-site timezone bbdb-loaddefs finder-inf tex-site
info package epg-config ido seq byte-opt gv bytecomp byte-compile
cl-extra help-mode cconv edmacro kmacro recentf tree-widget wid-edit
easymenu battery time wheatgrass-theme paren savehist saveplace
elec-pair desktop frameset cl-loaddefs pcase cl-lib delsel cua-base
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ediff-hook vc-hooks lisp-float-type mwheel x-win term/common-win x-dnd
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select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
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cl-preloaded nadvice loaddefs button faces cus-face macroexp files
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custom widget hashtable-print-readable backquote dbusbind inotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 1089431 137958)
(symbols 48 91117 0)
(miscs 40 21852 6282)
(strings 32 242283 13994)
(string-bytes 1 9961925)
(vectors 16 68138)
(vector-slots 8 1897265 137679)
(floats 8 638 1190)
(intervals 56 101369 7)
(buffers 976 247))
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#28477: 25.2; Gnus threading sometimes erratic
2017-09-17 5:16 bug#28477: 25.2; Gnus threading sometimes erratic N. Jackson
@ 2017-09-17 5:38 ` N. Jackson
2018-04-11 21:45 ` Lars Ingebrigtsen
1 sibling, 0 replies; 3+ messages in thread
From: N. Jackson @ 2017-09-17 5:38 UTC (permalink / raw)
To: 28477
At 01:16 -0400 on Sunday 2017-09-17, N. Jackson wrote:
>
> Attached are two screen shots showing this problem, one with a
> thread from the Emacs development list and one with a thread from
> this list.
Sorry, I neglected to be explicit about the problem is in the two
screenshots.
In the first screenshot (from this list), the highlighted message
from Simen Heggestoyl is dated the 26th of January (2017) but it
is threaded as a reply to a message from Tom Tromey dated the 3rd
of May (2017).
In the second screenshot (from the development list), the
highlighted message from Eli Zaretskii is dated October 12th
(2016) but it is threaded as a reply to a message from Paul Eggert
dated October 20th (2016).
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#28477: 25.2; Gnus threading sometimes erratic
2017-09-17 5:16 bug#28477: 25.2; Gnus threading sometimes erratic N. Jackson
2017-09-17 5:38 ` N. Jackson
@ 2018-04-11 21:45 ` Lars Ingebrigtsen
1 sibling, 0 replies; 3+ messages in thread
From: Lars Ingebrigtsen @ 2018-04-11 21:45 UTC (permalink / raw)
To: N. Jackson; +Cc: 28477
nljlistbox2@gmail.com (N. Jackson) writes:
> Sometimes when threading is enabled, Gnus displays the messages in
> a thread in a bizarre order in the *Summary* buffer, with an older
> message shown as a reply to a newer message. This cannot be right
> unless the author of one of the messages has a time machine.
It difficult to tell from the images you included, but it seems like
what you're seeing is the result of "gathered threads": Articles with
the same subject that are displayed visually as kinda sorta being in the
same thread. In those cases, getting the response before the answer
isn't unusual, because mail arrive in any which order.
> I thought perhaps that the `gnus-sort-gathered-threads-function'
> might be the solution here, but so far I have had no success with
> it. If I try to do
>
> (setq gnus-sort-gathered-threads-function '((not gnus-thread-sort-by-date)))
>
> , when the *Summary* buffer opens I get the error message
>
> sort: Invalid function: ((not gnus-thread-sort-by-date))
>
> .
>
> It almost seems that "a list containing functions and ‘(not
> some-function)’ elements" is not supported here?
Yes, that's correct. It just takes a function.
> To try to work around this, I tried
>
> (defun nlj-thread-sort-by-date-descending (h1 h2)
> "Sort threads in the opposite order to `gnus-thread-sort-by-date'."
> (not (gnus-thread-sort-by-date h1 h2)))
>
> (setq gnus-sort-gathered-threads-function 'nlj-thread-sort-by-date-descending)
What about
(defun nlj-thread-sort-by-date-descending (h1 h2)
"Sort threads in the opposite order to `gnus-thread-sort-by-date'."
(gnus-thread-sort-by-date h2 h1))
?
In any case, I don't think what you're seeing is a bug, so I'm closing
this bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-09-17 5:16 bug#28477: 25.2; Gnus threading sometimes erratic N. Jackson
2017-09-17 5:38 ` N. Jackson
2018-04-11 21:45 ` Lars Ingebrigtsen
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