GNU bug report logs - #4512
23.1; html-mode C-c C-f on runs of <P>

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Subject: Re: bug#4512: 23.1; html-mode C-c C-f on runs of <P>
To: Alan Third <alan@HIDDEN>
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Alan Third <alan@HIDDEN> writes:

> Kevin Ryde <user42@HIDDEN> writes:
>
>> In a html-mode buffer with runs of successive <P> tags, like
>>
>>     (progn
>>       (switch-to-buffer "foo")
>>       (dotimes (i 5000) (insert (format "<p> abc\n" i)))
>>       (goto-char (point-min))
>>       (html-mode))
>>
>> pressing C-c C-f gets an error
>>
>>     Variable binding depth exceeds max-specpdl-size
>
> I still see this in emacs 25.

I can reproduce this using Emacs 26.2.

Thanks,
Stefan Kangas

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From: Alan Third <alan@HIDDEN>
To: Kevin Ryde <user42@HIDDEN>
Subject: Re: bug#4512: 23.1; html-mode C-c C-f on runs of <P>
References: <87skefhq37.fsf@HIDDEN>
Date: Thu, 21 Jan 2016 20:37:49 +0000
In-Reply-To: <87skefhq37.fsf@HIDDEN> (Kevin Ryde's message of "Tue, 22 Sep
 2009 08:48:12 +1000")
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Kevin Ryde <user42@HIDDEN> writes:

> In a html-mode buffer with runs of successive <P> tags, like
>
>     (progn
>       (switch-to-buffer "foo")
>       (dotimes (i 5000) (insert (format "<p> abc\n" i)))
>       (goto-char (point-min))
>       (html-mode))
>
> pressing C-c C-f gets an error
>
>     Variable binding depth exceeds max-specpdl-size

I still see this in emacs 25.

-- 
Alan Third

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To: Kevin Ryde <user42@HIDDEN>
Cc: 4512 <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN
Subject: Re: bug#4512: 23.1; html-mode C-c C-f on runs of <P>
Message-ID: <jwv63bapsho.fsf-monnier+emacsbugreports@HIDDEN>
References: <87skefhq37.fsf@HIDDEN>
Date: Tue, 22 Sep 2009 17:45:34 -0400
In-Reply-To: <87skefhq37.fsf@HIDDEN> (Kevin Ryde's message of "Tue, 22 Sep
	2009 08:48:12 +1000")
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> In a html-mode buffer with runs of successive <P> tags, like

>     (progn
>       (switch-to-buffer "foo")
>       (dotimes (i 5000) (insert (format "<p> abc\n" i)))
>       (goto-char (point-min))
>       (html-mode))

> pressing C-c C-f gets an error

>     Variable binding depth exceeds max-specpdl-size

> instead of going forward.  The way C-c C-f `sgml-skip-tag-forward'
> requires a closing </P> etc is no doubt what's wanted for sgml, but for
> the looser html it'd be good if it recognised some closing tags are
> optional.

The necessary info is already present and used by the indentation
code, via the function sgml-unclosed-tag-p.  All it needs is for someone
to figure out how to merge the indentation's navigation code with the
sgml-skip-tag-(for|back)ward  code (which predates it, but wasn't good
enough).


        Stefan

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Cc: 4512 <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN
Subject: Re: bug#4512: 23.1; html-mode C-c C-f on runs of <P>
Message-ID: <jwv63bapsho.fsf-monnier+emacsbugreports@HIDDEN>
References: <87skefhq37.fsf@HIDDEN>
Date: Tue, 22 Sep 2009 17:45:34 -0400
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	2009 08:48:12 +1000")
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> In a html-mode buffer with runs of successive <P> tags, like

>     (progn
>       (switch-to-buffer "foo")
>       (dotimes (i 5000) (insert (format "<p> abc\n" i)))
>       (goto-char (point-min))
>       (html-mode))

> pressing C-c C-f gets an error

>     Variable binding depth exceeds max-specpdl-size

> instead of going forward.  The way C-c C-f `sgml-skip-tag-forward'
> requires a closing </P> etc is no doubt what's wanted for sgml, but for
> the looser html it'd be good if it recognised some closing tags are
> optional.

The necessary info is already present and used by the indentation
code, via the function sgml-unclosed-tag-p.  All it needs is for someone
to figure out how to merge the indentation's navigation code with the
sgml-skip-tag-(for|back)ward  code (which predates it, but wasn't good
enough).


        Stefan

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From: Kevin Ryde <user42@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 23.1; html-mode C-c C-f on runs of <P>
Date: Tue, 22 Sep 2009 08:48:12 +1000
Message-ID: <87skefhq37.fsf@HIDDEN>
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--=-=-=

In a html-mode buffer with runs of successive <P> tags, like

    (progn
      (switch-to-buffer "foo")
      (dotimes (i 5000) (insert (format "<p> abc\n" i)))
      (goto-char (point-min))
      (html-mode))

pressing C-c C-f gets an error

    Variable binding depth exceeds max-specpdl-size

instead of going forward.  The way C-c C-f `sgml-skip-tag-forward'
requires a closing </P> etc is no doubt what's wanted for sgml, but for
the looser html it'd be good if it recognised some closing tags are
optional.


--=-=-=
Content-Type: text/x-diff
Content-Disposition: inline; filename=sgml-mode.el.skip-comment.diff

--- sgml-mode.el.~1.140.~	2009-08-22 07:48:30.000000000 +1000
+++ sgml-mode.el	2009-09-22 08:42:35.000000000 +1000
@@ -840,6 +840,14 @@
   ;; FIXME: Use sgml-get-context or something similar.
   ;; It currently might jump to an unrelated </P> if the <P>
   ;; we're skipping has no matching </P>.
+
+  ;; FIXME: For html-mode a closing </P> is optional, and others like
+  ;; </TR> similarly.  This code or some `html-skip-tag-forward'
+  ;; should recognise a new <P> ends a previous <P>, and with some
+  ;; precedence levels among <TR>, <TD>, <P>, etc.  Currently the
+  ;; recursion in the `while' below means runs of successive <P> error
+  ;; out exceeding max-specpdl-size.
+  
   (let ((return t))
     (with-syntax-table sgml-tag-syntax-table
       (while (>= arg 1)

--=-=-=



In GNU Emacs 23.1.1 (i486-pc-linux-gnu, GTK+ Version 2.16.5)
 of 2009-08-03 on raven, modified by Debian
configured using `configure  '--build=i486-linux-gnu' '--host=i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.1/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU
  value of $XMODIFIERS: nil
  locale-coding-system: iso-latin-1-unix
  default-enable-multibyte-characters: t

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