GNU bug report logs - #1118
23.0.60; Info claims no index exists if first instance of an info file is visited via info-lookup-symbol

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Message #3 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Lawrence Mitchell <wence <at> gmx.li>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; Info claims no index exists if first instance of an info file is visited via info-lookup-symbol
Date: Wed, 08 Oct 2008 09:44:30 +0100

In GNU Emacs 23.0.60.4 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2008-10-07 on lamacq.ph.ed.ac.uk
Windowing system distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure  '-C' '--prefix=/scratch/s0198183/applications/emacs-trunk/' 'CFLAGS=-ggdb3 -O0' '--without-rsvg''

emacs -Q
C-h i d m Elisp RET
i set-text-properties RET

takes me to the set-text-properties entry in the Elisp manual (as
expected).

emacs -Q
C-h S add-text-properties RET ; use info-look to find add-text-properties
C-x b *info* RET              ; switch to info buffer
i                             ; try to lookup something in the index

complains "No index"

Cheers,
Lawrence
-- 
Lawrence Mitchell <wence <at> gmx.li>

Message #8 received at 1118 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: 1118 <at> debbugs.gnu.org
Cc: Lawrence Mitchell <wence <at> gmx.li>
Subject: Re: bug#1118: 23.0.60;	Info claims no index exists if first instance
 of an info file is visited via info-lookup-symbol
Date: Wed, 08 Oct 2008 20:37:32 +0200

> In GNU Emacs 23.0.60.4 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
>  of 2008-10-07 on lamacq.ph.ed.ac.uk
> Windowing system distributor `The X.Org Foundation', version 11.0.60802000
> configured using `configure  '-C' '--prefix=/scratch/s0198183/applications/emacs-trunk/' 'CFLAGS=-ggdb3 -O0' '--without-rsvg''
>
> emacs -Q
> C-h i d m Elisp RET
> i set-text-properties RET
>
> takes me to the set-text-properties entry in the Elisp manual (as
> expected).
>
> emacs -Q
> C-h S add-text-properties RET ; use info-look to find add-text-properties
> C-x b *info* RET              ; switch to info buffer
> i                             ; try to lookup something in the index
>
> complains "No index"

FWIW, it's due to this change

2008-06-15  Juri Linkov  <juri <at> jurta.org>

	* info.el (Info-toc): Call Info-toc-nodes instead of Info-build-toc.
	(Info-toc, Info-insert-toc): Increment nth's index to add PARENT
	as the second element.
	(Info-build-toc): Add PARENT element extracted from the Up pointer.
	Don't print progress messages.
	(Info-toc-nodes): New variable and function.
	(Info-index-nodes): Optimize non-string file name case.
	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
	
Juri, please have a look.

martin

Message #13 received at 1118 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: martin rudalics <rudalics <at> gmx.at>, 1118 <at> debbugs.gnu.org
Cc: Lawrence Mitchell <wence <at> gmx.li>
Subject: Re: bug#1118: 23.0.60;	Info claims no index exists if first instance
 of an info file is	visited via info-lookup-symbol
Date: Thu, 09 Oct 2008 03:36:39 +0300

>  > emacs -Q
>  > C-h S add-text-properties RET ; use info-look to find 
> add-text-properties
>  > C-x b *info* RET              ; switch to info buffer
>  > i                             ; try to lookup something in the index
>  >
>  > complains "No index"
> 
> FWIW, it's due to this change
> 
> 2008-06-15  Juri Linkov  <juri <at> jurta.org>
> 
>     * info.el (Info-toc): Call Info-toc-nodes instead of Info-build-toc.
>     (Info-toc, Info-insert-toc): Increment nth's index to add PARENT
>     as the second element.
>     (Info-build-toc): Add PARENT element extracted from the Up pointer.
>     Don't print progress messages.
>     (Info-toc-nodes): New variable and function.
>     (Info-index-nodes): Optimize non-string file name case.
>     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>     
> Juri, please have a look.

This whole change was not intended to work with the workflow of `C-h S'.
The problem is that `Info-build-toc' calls `Info-index-node' on the
temporary buffer where it fails to build the index.  Adding a line
`(Info-index-node "Top" file)' at the beginning of `Info-build-toc'
just before `with-temp-buffer' will fix this bug by building the
index outside of the temporary buffer, but I'd like to find
more elegant solution.

-- 
Juri Linkov
http://www.jurta.org/emacs/

Message #18 received at 1118-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: Lawrence Mitchell <wence <at> gmx.li>
Cc: 1118-done <at> debbugs.gnu.org
Subject: Re: bug#1118: 23.0.60; Info claims no index exists if first instance of an info file is visited via info-lookup-symbol
Date: Sun, 19 Oct 2008 02:46:52 +0300

> emacs -Q
> C-h S add-text-properties RET ; use info-look to find add-text-properties
> C-x b *info* RET              ; switch to info buffer
> i                             ; try to lookup something in the index
>
> complains "No index"

Thanks, fixed.

The Info browser was unable to get the information about the index cookie
support, so it treated it as a non-cookie file, and the temporary value of
Info-point-loc (set by navigation from the index node to the defined line
number) mislead into skipping a list of index nodes in the Top node.

-- 
Juri Linkov
http://www.jurta.org/emacs/

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