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bug#23594: 25.0.94; Display errors on Linux tty
From: |
Alan Mackenzie |
Subject: |
bug#23594: 25.0.94; Display errors on Linux tty |
Date: |
Sun, 22 May 2016 09:38:13 +0000 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
Hello, Eli.
On Sat, May 21, 2016 at 10:09:38PM +0300, Eli Zaretskii wrote:
> > > This bug exists since we started showing the 'decomposition' of
> > > characters in Emacs 24.1. With LF, we send a literal LF character
> > > to the screen.
That's only half the story. The literal LF doesn't seem to be the
problem. Rather, it's got a 'composition text-property attached to it.
The string we're trying to display is
#(" decomposition: (10) ('\n')\n" 24 25 (composition (0 1 [9 10 9])))
^
|
24
What is this composition trying to do? The [9 10 9] is [\t \n \t].
The whole thing is a result of calling
(char-code-property-description 'decomposition '(10))
Under X-Windows, the same string is displayed, this time successfully.
The call
(inseert #(" decomposition: .... [9 10 9])))
works on X-Windows, the "\n" with the composition property being
displayed as a square box.
> > OK. The next question is is it easy to fix?
> Yes. We should not send control characters to that buffer.
It seems to me there is a bug in the display engine here: the same
string which is displayed successfully in X-Windows goes badly wrong on
a Linux tty.
Comments?
--
Alan Mackenzie (Nuremberg, Germany).
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/21
- bug#23594: 25.0.94; Display errors on Linux tty, Eli Zaretskii, 2016/05/21
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/21
- bug#23594: 25.0.94; Display errors on Linux tty, Eli Zaretskii, 2016/05/21
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/21
- bug#23594: 25.0.94; Display errors on Linux tty,
Alan Mackenzie <=
- bug#23594: 25.0.94; Display errors on Linux tty, Eli Zaretskii, 2016/05/22
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/22
- bug#23594: 25.0.94; Display errors on Linux tty, Eli Zaretskii, 2016/05/22
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/22
- bug#23594: 25.0.94; Display errors on Linux tty, Alan Mackenzie, 2016/05/22