wrong-type-argument char-table-p about nano-emacs HOT 15 CLOSED

Done.

from nano-emacs.

I should have said, this is an Emacs 27.1 that I compiled myself on MacOS.

from nano-emacs.

Thanks for the report. I'm not too familiar with byte compilation and I don't quite understand why the byte compiled code would fail. If you comment out the faulty line, compilation is ok?

from nano-emacs.

It compiles just fine, that's an error I get when the compiled code runs. For the moment, I've just deleted nano-layout.elc.

from nano-emacs.

From the error, the faulty line is around L44. Can you check if you comment it ?

from nano-emacs.

If I comment out that line (and the set-display-table-slot below it, for good measure), the error does not occur. I can't tell what other effect this might have though. I'm not sure what that code is supposed to accomplish.

from nano-emacs.

This line replaces the default continuation character ($) with a nicer glyph (…) . No idea why byte compiling it poses a problem. Maybe you can test this line with emacs -q and check if the problem persists. In such case, you would need to report the problem to emacs+bug.

from nano-emacs.

Could this have to do with the font? Not sure how the bytecode compilation process works (or how fonts are handled, I'm new to emacs), but the error went away when I installed Fira Code (I had neither Fira Code nor Roboto installed in my system)

from nano-emacs.

That might be an explanation yes if the compiled code doesn't do all the checks on the availability of fonts.

from nano-emacs.

Hi I'm facing the same error even when I have both the fonts installed on my system, and I commented out the lines and checked too, the error persists. Any insight?

from nano-emacs.

Do you mean that you get the same behavior with/without faulty line when compiling?

from nano-emacs.

I noticed that I didn't have Fira Code installed and wondered if that was it. It wasn't. I've now got both Fira Code and Roboto Mono installed and I'm still getting the same error. Emacs 27.1.91 built by me in March on MacOS.

I poked at it a bit more without any luck. I did observe the following, however: nano-layout contains a reference to 'nano-face-faded:

(defface fallback '((t :family "Fira Code"
                       :inherit 'nano-face-faded)) "Fallback")
(set-display-table-slot standard-display-table 'truncation
                        (make-glyph-code ?… 'fallback))

FWIW, that face isn't defined until 'nano-faces is loaded. But my random attempt to load the faces before loading layout didn't have any effect.

from nano-emacs.

Good point. Can you try to remove the inherit part (or replace with default) and check if this solves the problem?

from nano-emacs.

While I'm no closer to understanding what the problem is, I've managed to completely separate it from NΛNO. Put the following lines in testdt.el:

(message "Hello")
(describe-display-table standard-display-table)
(message (format "%s" (char-table-p standard-display-table)))
(message "Goodbye")

Start emacs: emacs -q -l testdt.el

You'll get this in the *Message* buffer:

For information about GNU Emacs and the GNU system, type C-h C-a.
Hello
Type C-x 1 to delete the help window.
t
Goodbye

And this in the *Help* buffer:

Truncation glyph: nil
Wrap glyph: nil
Escape glyph: nil
Ctrl glyph: nil
Selective display glyph sequence: nil
Vertical window border glyph: nil
Character display glyph sequences:

Now byte compile the file and start emacs: emacs -q -l testdt.elc

You'll get an the wrong-type-argument error and the *Messages* buffer will contain:

For information about GNU Emacs and the GNU system, type C-h C-a.
Hello
display-table-slot: Wrong type argument: char-table-p, nil

The *Help* buffer will contain:

Truncation glyph: 

So there's something wrong with attempting to access the standard-display-table from byte compiled code.

I've no clue what to do next with this information. I'm not on the Emacas developers list anymore, maybe it's time to send it there?

from nano-emacs.

I think you can directly file a bug from inside emacs (M-x report-emacs-bug) with your explanation.

from nano-emacs.