>> Some debugging shows it seems to be the latter: All top-level
>> definitions are available as paper variables within a book's paper
>> block, together with all paper variables of the top-level paper
>> block:
>>
>> Is this really intentional?
>
> https://gitlab.com/lilypond/lilypond/-/issues/5917
> https://codereview.appspot.com/567450043
Really? I would never have expected that this quite innocent-looking
patch makes top-level definitions (outside of any block) available as
paper variables within `\book`. The comment in `book.cc` only talks
about `\header` blocks. How does this influence stuff outside of
`\header`? And how does it influence `\paper`?
In case this patch is really the cause, can the behaviour be
restricted to `\header` blocks as announced in the commit message?
Werner
