GNU bug report logs - #22680
25.0.91; Background colour sometimes not displayed when no foreground text (in shr?)

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: nljlistbox2 <at> gmail.com (N. Jackson)
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Mon, 15 Feb 2016 10:24:51 -0400

[Message part 1 (text/plain, inline)]

This is a follow up to bug#22547 which seems to be fixed for the
original test cases but is not fixed in general.

When reading mail/news in Gnus, HTML messages sometimes have patches
of missing background colour. That is, there are patches where the
window background colour shows through. This problem is not apparent
in Emacs 24.

The problem does not seem to happen where there is text in the
foreground. Rather, the HTML background colour is missing on some
lines (before and) after the text (begins or) ends.

mm-text-html-renderer is `shr' (default). Also, possibly relevant,
in Customize I have:

 '(shr-color-visible-luminance-min 75 t)
 '(shr-use-fonts nil)

Sreenshots and raw text of two new problematic messages are
attached.

[example-3_screen-capture.png (image/png, attachment)]

[example-3_raw-email.txt (text/plain, attachment)]

[example-4_screen-capture.png (image/png, attachment)]

[example-4_raw-email.txt (text/plain, attachment)]

[Message part 6 (text/plain, inline)]

In GNU Emacs 25.0.91.1 (x86_64-unknown-linux-gnu, GTK+ Version
 3.18.7) of 2016-02-14 built on moondust Windowing system
 distributor 'Fedora Project', version 11.0.11800000 System
 Description: Fedora release 23 (Twenty Three)

Configured using:
 'configure --prefix=/home/nlj/local/ --enable-checking=yes,glyphs
 'CFLAGS=-O0 -g3 -ggdb''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GCONF GSETTINGS NOTIFY
ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LC_MONETARY: en_DK.utf8
  value of $LC_NUMERIC: en_DK.utf8
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_CA.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Text

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  recentf-mode: t
  display-battery-mode: t
  display-time-mode: t
  save-place-mode: t
  delete-selection-mode: t
  show-paren-mode: t
  savehist-mode: t
  electric-pair-mode: t
  desktop-save-mode: t
  cua-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Mark saved where search started
Auto-saving...done
Mark saved where search started
Making completion list...
Type C-x 1 to delete the help window.
<mouse-7> is undefined
funcall-interactively: End of buffer [3 times]
next-line: End of buffer [5 times]
Saving file /home/nlj/bug-reports.txt...
Wrote /home/nlj/bug-reports.txt

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georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule 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 737755 158829)
 (symbols 48 99250 0)
 (miscs 40 3798 5017)
 (strings 32 194862 34321)
 (string-bytes 1 7450435)
 (vectors 16 62031)
 (vector-slots 8 1886442 240636)
 (floats 8 821 744)
 (intervals 56 50929 603)
 (buffers 976 98)
 (heap 1024 123073 11280))

Message #10 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: nljlistbox2 <at> gmail.com (N. Jackson)
Cc: 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Tue, 16 Feb 2016 17:20:34 +1100

nljlistbox2 <at> gmail.com (N. Jackson) writes:

> The problem does not seem to happen where there is text in the
> foreground. Rather, the HTML background colour is missing on some
> lines (before and) after the text (begins or) ends.
>
> mm-text-html-renderer is `shr' (default). Also, possibly relevant,
> in Customize I have:
>
>  '(shr-color-visible-luminance-min 75 t)
>  '(shr-use-fonts nil)

I'm unable to reproduce this on the emacs-25 branch.  What commit are
you up to?

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

Message #13 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: nljlistbox2 <at> gmail.com (N. Jackson)
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Tue, 16 Feb 2016 16:10:19 -0400

Hi Lars,

At 17:20 +1100 on Tuesday 2016-02-16, Lars Ingebrigtsen wrote:

> I'm unable to reproduce this on the emacs-25 branch.  What commit are
> you up to?

That was on the second pretest (25.0.91) from the tarball, obtained from
ftp://alpha.gnu.org/gnu/emacs/pretest/emacs-25.0.91.tar.xz and
downloaded at 2016-02-14.13:42 -0400. [I guess that's why
report-emacs-bug didn't include a commit number?]

I don't know how to find out the commit number it corresponds to,
but that pretest was announced 2016-02-13.20:52 +0100 so I suppose it
corresponds to the state of emacs-25 a few hours before that. As you
closed bug http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22547 on
2016-02-09, I assumed that the new pretest would include your fix.

In any case, I checked out emacs-25 from savannah this afternoon
(revision: 106b5bb68dc2ff0776b920a7f31ffc3b17ef8013), and I still see
the problem shown in the Example 3 and Example 4 screenshots.

What additional information should I provide?

Thanks.

N.

Message #16 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: nljlistbox2 <at> gmail.com (N. Jackson)
Cc: larsi <at> gnus.org, 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Tue, 16 Feb 2016 22:22:46 +0200

> From: nljlistbox2 <at> gmail.com (N. Jackson)
> Date: Tue, 16 Feb 2016 16:10:19 -0400
> Cc: 22680 <at> debbugs.gnu.org
> 
> That was on the second pretest (25.0.91) from the tarball, obtained from
> ftp://alpha.gnu.org/gnu/emacs/pretest/emacs-25.0.91.tar.xz and
> downloaded at 2016-02-14.13:42 -0400. [I guess that's why
> report-emacs-bug didn't include a commit number?]
> 
> I don't know how to find out the commit number it corresponds to,

"git tag" should help you find that out.  There's a tag for each
pretest there.

Message #19 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: nljlistbox2 <at> gmail.com (N. Jackson)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: larsi <at> gnus.org, 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Tue, 16 Feb 2016 18:00:23 -0400

Thanks Eli,

At 22:22 +0200 on Tuesday 2016-02-16, Eli Zaretskii wrote:

>> From: nljlistbox2 <at> gmail.com (N. Jackson)
>> 
>> I don't know how to find out the commit number it corresponds to,
>
> "git tag" should help you find that out.  There's a tag for each
> pretest there.

There is no emacs-pretest-25.0.91 tag, but there's an emacs-25.0.91 tag,
and I guess that's it. FWIW, it corresponds to this commit:

    commit 23ca48d3d867cfff9f49ef600e2aad7a26c7a870
    Author: Nicolas Petton <nicolas <at> petton.fr>
    Date:   Sat Feb 13 20:30:37 2016 +0100

        Bump version to 25.0.91

        * README:
        * configure.ac:
        * msdos/sed2v2.inp: Bump version to 25.0.91.

But as I said, I'm still seeing the bug in this afternoon's emacs-25.

N.

Message #26 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: nljlistbox2 <at> gmail.com (N. Jackson)
Cc: 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Mon, 29 Feb 2016 22:19:38 +1100

nljlistbox2 <at> gmail.com (N. Jackson) writes:

> In any case, I checked out emacs-25 from savannah this afternoon
> (revision: 106b5bb68dc2ff0776b920a7f31ffc3b17ef8013), and I still see
> the problem shown in the Example 3 and Example 4 screenshots.

I was able to reproduce this now when using a black Emacs background.
The two different HTML backgrounds were indistinguishable from each
other when the Emacs background was white.

This should now be fixed on the trunk, and I'll backport it to emacs-25.

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

Message #33 received at 22680 <at> debbugs.gnu.org (full text, mbox):

From: nljlistbox2 <at> gmail.com (N. Jackson)
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 22680 <at> debbugs.gnu.org
Subject: Re: bug#22680: 25.0.91;
 Background colour sometimes not displayed when no foreground text (in
 shr?)
Date: Mon, 29 Feb 2016 21:22:12 -0400

At 22:19 +1100 on Monday 2016-02-29, Lars Ingebrigtsen wrote:
>
> This should now be fixed on the trunk, and I'll backport it to emacs-25.

Hi Lars.

I can confirm that this is indeed fixed for me in emacs-25 
(Repository revision: dc42d0ca0b7b6877bd22b91e19c34d3d7d7902f9).

Thank you.

N.

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