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bug#36858: 27.0.50; display bugs with display-fill-column-indicator-mode

From: Ergus
Subject: bug#36858: 27.0.50; display bugs with display-fill-column-indicator-mode
Date: Fri, 9 Aug 2019 00:29:14 +0200
User-agent: NeoMutt/20180716

On Thu, Aug 08, 2019 at 08:33:38PM +0300, Eli Zaretskii wrote:
Date: Thu, 8 Aug 2019 09:17:58 +0200
From: Ergus <address@hidden>
Cc: address@hidden, address@hidden

After tying this solution I proposed yesterday to add the indicator also
for the latest line (call extend_face_to_end_of_line for a no empty line
without \n too) I get it working perfectly fine only in the tui

In gui it just doesn't work. But it seems that the issue is not due to
the condition:

if (!get_next_display_element (it));

because when I add a test glyph unconditionally there; it is not printed
in the screen, but when I add a message to stdout it is.

For sure I am missing something here, but what?

Is it possible that some optimization in the gui glue code stops
printing glyphs OR that some later code hides the extra glyphs?

I don't think I understand what you tried well enough to answer the
question.  Can you show a patch relative to the current master?

See the attachement


Attachment: last_line.patch
Description: Text document

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