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* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
@ 2021-05-01  8:16 Norm Tovey-Walsh
  2021-05-01 11:36 ` Eli Zaretskii
  0 siblings, 1 reply; 7+ messages in thread
From: Norm Tovey-Walsh @ 2021-05-01  8:16 UTC (permalink / raw)
  To: 48135


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 a 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: 

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

I originally encountered this issue in the context of nano-emacs,
https://github.com/rougier/nano-emacs/issues/28 and it appears that I’m
not alone in encountering it.


In GNU Emacs 27.1.91 (build 2, x86_64-apple-darwin20.3.0, NS appkit-2022.30 Version 11.2.2 (Build 20D80))
 of 2021-03-03 built on hackmatack.local
Repository revision: 74a71c41e03f28a6380a0537babfdd6c1edb929a
Repository branch: HEAD
Windowing system distributor 'Apple', version 10.3.2022
System Description:  macOS 11.3

Recent messages:
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[mu4e] Found 103 matching messages
Saving all Org buffers... done
Are you sure you want to execute 8 marks? (y or n) y
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You should have a section marked ";;; Commentary:"

The first line should be of the form: ";;; package --- Summary"

Configured using:
 'configure --with-imagemagick
 PKG_CONFIG_PATH=/usr/local/opt/libxml2/lib/pkgconfig'

Configured features:
RSVG IMAGEMAGICK DBUS GLIB NOTIFY KQUEUE ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS XIM NS MODULES THREADS JSON PDUMPER LCMS2 GMP

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8

Major mode: Emacs-Lisp

Minor modes in effect:
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  blink-cursor-mode: t
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  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

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custom widget hashtable-print-readable backquote threads dbusbind kqueue
cocoa ns lcms2 multi-tty make-network-process emacs)

Memory information:
((conses 16 1637339 243122)
 (symbols 48 98772 325)
 (strings 32 426165 25598)
 (string-bytes 1 12306621)
 (vectors 16 208323)
 (vector-slots 8 3890800 328336)
 (floats 8 1042 1857)
 (intervals 56 84707 935)
 (buffers 1000 820))





^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01  8:16 bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code? Norm Tovey-Walsh
@ 2021-05-01 11:36 ` Eli Zaretskii
  2021-05-01 12:00   ` Gregory Heytings
  0 siblings, 1 reply; 7+ messages in thread
From: Eli Zaretskii @ 2021-05-01 11:36 UTC (permalink / raw)
  To: Norm Tovey-Walsh; +Cc: 48135

> From: Norm Tovey-Walsh <ndw@nwalsh.com>
> Date: Sat, 01 May 2021 09:16:33 +0100
> 
> Now byte compile the file and start emacs: emacs -q -l testdt.elc
> 
> You'll get a 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: 
> 
> Apparently, there's something wrong with attempting to access the
> standard-display-table from byte compiled code.

I cannot reproduce this with the stock version of Emacs 27.2 (of which
yours seems to be a pretest).  I get the same results from both the
compiled and the interpreted versions.





^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01 11:36 ` Eli Zaretskii
@ 2021-05-01 12:00   ` Gregory Heytings
  2021-05-01 12:16     ` Eli Zaretskii
  2021-05-01 13:07     ` Norm Tovey-Walsh
  0 siblings, 2 replies; 7+ messages in thread
From: Gregory Heytings @ 2021-05-01 12:00 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: Norm Tovey-Walsh, 48135


>> Now byte compile the file and start emacs: emacs -q -l testdt.elc
>>
>> You'll get a 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:
>>
>> Apparently, there's something wrong with attempting to access the 
>> standard-display-table from byte compiled code.
>
> I cannot reproduce this with the stock version of Emacs 27.2 (of which 
> yours seems to be a pretest).  I get the same results from both the 
> compiled and the interpreted versions.
>

Perhaps it's a GNU/Linux specific bug, but I can reproduce this with Emacs 
22-28.  It worked with Emacs 21.  standard-display-table is nil before 
invoking describe-display-table, and somehow becomes populated when 
discribe-display-table is invoked from a non-byte-compiled file, but not 
when it is invoked from a byte-compiled file.  A simple workaround is to 
(require 'disp-table).





^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01 12:00   ` Gregory Heytings
@ 2021-05-01 12:16     ` Eli Zaretskii
  2021-05-01 12:22       ` Gregory Heytings
  2021-05-01 13:07     ` Norm Tovey-Walsh
  1 sibling, 1 reply; 7+ messages in thread
From: Eli Zaretskii @ 2021-05-01 12:16 UTC (permalink / raw)
  To: Gregory Heytings; +Cc: ndw, 48135

> Date: Sat, 01 May 2021 12:00:27 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: Norm Tovey-Walsh <ndw@nwalsh.com>, 48135@debbugs.gnu.org
> 
> A simple workaround is to (require 'disp-table).

Why isn't that a solution?  IOW, why not request that code which does
this needs to require disp-table?





^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01 12:16     ` Eli Zaretskii
@ 2021-05-01 12:22       ` Gregory Heytings
  0 siblings, 0 replies; 7+ messages in thread
From: Gregory Heytings @ 2021-05-01 12:22 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: ndw, 48135


>> A simple workaround is to (require 'disp-table).
>
> Why isn't that a solution?  IOW, why not request that code which does 
> this needs to require disp-table?
>

Yes, I said "workaround", I could have said "solution" ;-)  It makes sense 
indeed to request a require disp-table in such cases, but OTOH I 
understand that seeing byte-compiled code behaving differently from the 
non-byte-compiled one is surprising.





^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01 12:00   ` Gregory Heytings
  2021-05-01 12:16     ` Eli Zaretskii
@ 2021-05-01 13:07     ` Norm Tovey-Walsh
  2021-05-02  7:12       ` Lars Ingebrigtsen
  1 sibling, 1 reply; 7+ messages in thread
From: Norm Tovey-Walsh @ 2021-05-01 13:07 UTC (permalink / raw)
  To: Gregory Heytings; +Cc: 48135

[-- Attachment #1: Type: text/plain, Size: 527 bytes --]

Gregory Heytings <gregory@heytings.org> writes:
> but not when it is invoked from a byte-compiled file.  A simple
> workaround is to (require 'disp-table).

Thanks. I’ve tested that and it does fix the issue. And I’ll build 27.2
this weekend :-)

                                        Be seeing you,
                                          norm

--
Norman Tovey-Walsh <ndw@nwalsh.com>
https://nwalsh.com/

> Any bureaucracy reorganized to enhance efficiency is indistinguishable
> from its predecessor.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]

^ permalink raw reply	[flat|nested] 7+ messages in thread

* bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code?
  2021-05-01 13:07     ` Norm Tovey-Walsh
@ 2021-05-02  7:12       ` Lars Ingebrigtsen
  0 siblings, 0 replies; 7+ messages in thread
From: Lars Ingebrigtsen @ 2021-05-02  7:12 UTC (permalink / raw)
  To: Norm Tovey-Walsh; +Cc: Gregory Heytings, 48135

Norm Tovey-Walsh <ndw@nwalsh.com> writes:

> Thanks. I’ve tested that and it does fix the issue.

I think this is the correct solution, so I'm closing this bug report.

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





^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2021-05-02  7:12 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-01  8:16 bug#48135: 27.1.91; standard-display-table incorrectly initialized in byte compiled code? Norm Tovey-Walsh
2021-05-01 11:36 ` Eli Zaretskii
2021-05-01 12:00   ` Gregory Heytings
2021-05-01 12:16     ` Eli Zaretskii
2021-05-01 12:22       ` Gregory Heytings
2021-05-01 13:07     ` Norm Tovey-Walsh
2021-05-02  7:12       ` Lars Ingebrigtsen

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