Re: info: prev-line and scroll-backward are buggy on gnuplot.info

[Eli Zaretskii]

> Date: Sat, 12 Nov 2022 11:39:41 +0100
> From: Vincent Lefevre <vincent@vinc17.net>
> Cc: bug-texinfo@gnu.org, 989029@bugs.debian.org
> 
> >   * Menu:
> > 
> >   * Bugs::
> > 
> > See that "Bugs" at the end?  This is the problem: since "Bugs" is a
> > top-level node, its presence in a level-1 node's menu makes the node
> > tree not really a tree, so Backspace loops.
> 
> You mean that the menus can affect the structure of the document?

Yes, of course.

> This seems a bad and unnecessary idea. Why not just considering
> the "File:" lines of the info manual to deduce the structure of
> the document?

Because they don't say enough, not when a node has sub-nodes.
Backspace in a node A that has sub-nodes should go to the sub-node of
A which is the _last_ one in the menu in the node A, exactly like SPC
in such a node should go to the _first_ sub-node in A's menu.  How do
you do that without consulting the menus?

> Actually the issue is probably more that one has
> 
> File: gnuplot.info,  Node: Bugs,  Next: Concept_Index,  Prev: Terminal_types, 
>  Up: Top
> 
> with "Prev: Terminal_types" referencing to
> 
> File: gnuplot.info,  Node: Terminal_types,  Next: Bugs,  Prev: Commands,  Up: 
> Top
> 
> which has "Next: Bugs", and following the "Next:", one reaches
> 
> File: gnuplot.info,  Node: External_libraries,  Prev: known_limitations,  Up: 
> Bugs

Sorry, I don't understand what you are trying to say here.