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bug#57066: 29.0.50; Complex emoji overlaps with text
From: |
Eli Zaretskii |
Subject: |
bug#57066: 29.0.50; Complex emoji overlaps with text |
Date: |
Tue, 09 Aug 2022 19:05:06 +0300 |
> From: Protesilaos Stavrou <info@protesilaos.com>
> Cc: 57066@debbugs.gnu.org
> Date: Tue, 09 Aug 2022 15:50:10 +0300
>
> >> Right after inserting the "sun" emoji, the 'describe-char' does not
> >> work. The echo area shows:
> >>
> >> point=154 of 153 (EOB) column=7
> >
> > Are you saying that what describe-char does at EOB means it doesn't
> > work? The above is exactly the expected result at EOB.
>
> Sorry, I meant that I could not produce a Help buffer.
That's expected: there's no character at EOB.
> >> cl--assertion-failed: Assertion failed: (not (multibyte-string-p str))
> >
> > I cannot reproduce that, either. Could you run this under Edebug and
> > show the value of 'str' in the above assertion?
>
> I am not sure how to do it with Edebug.
I tried to explain that below.
> With (setq debug-on-error t) I get this:
>
> Debugger entered--Lisp error: (cl-assertion-failed ((not (multibyte-string-p
> str)) nil))
> cl--assertion-failed((not (multibyte-string-p str)))
> encoded-string-description(#("😀" 0 1 (charset unicode)) nil)
> describe-char(146)
There are 2 calls to encoded-string-description in describe-char, and
it's important to know which one causes this and why.
To run this under Edebug, do the following
emacs -Q
M-x load-library RET descr-text.el RET
C-x C-f /path/to/lisp/international/descr-text.el RET
C-u 385 M-g g
M-x edebug-defun RET
Note that you must load-library with an explicit .el extension.
Line 385 in descr-text.el is where describe-char starts.
Then repeat the recipe, and when you call describe-char, Edebug will
kick in. Now step through the code and try to figure out which call
to encoded-string-description is the one that barfs. My guess is that
it's the second one, in which case it is important to know the value
of the variable 'charset' here:
("file code"
,@(if multibyte-p
(let* ((coding buffer-file-coding-system)
(encoded (encode-coding-char char coding charset))) <<<<<<
(if encoded
(list (encoded-string-description encoded coding)
(format "(encoded by coding system %S)"
coding))
Thanks.
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Eli Zaretskii, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Eli Zaretskii, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text,
Eli Zaretskii <=
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Eli Zaretskii, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Eli Zaretskii, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/09
- bug#57066: 29.0.50; Complex emoji overlaps with text, Eli Zaretskii, 2022/08/10
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/11
- bug#57066: 29.0.50; Complex emoji overlaps with text, YAMAMOTO Mitsuharu, 2022/08/11
- bug#57066: 29.0.50; Complex emoji overlaps with text, YAMAMOTO Mitsuharu, 2022/08/11
- bug#57066: 29.0.50; Complex emoji overlaps with text, Protesilaos Stavrou, 2022/08/11