[luatex] segfault with luatex id 7509

[Werner LEMBERG]

> Note that the issue exhibits itself so severely because the file
> `hyphenation.texi` does `\hyphenation` for each word separately,
> this is less efficient and unnecessary, when `\hyphenation` can
> process many words just fine.

While I don't have sufficient time to test your patch, I could
successfully make luatex process the LilyPond documentation by
following this advice, thanks.


    Werner