# [Dev-luatex] keeping in sync with pdftex changes

Hans Hagen j.hagen at xs4all.nl
Mon Jan 11 19:11:16 CET 2021

```On 1/11/2021 6:12 PM, Ulrike Fischer wrote:

> (It is not an very important change. The one case in LaTeX where it
> really mattered has been resolve by adjusting the box levels. I only
> mentioned it here too, so that you can consider it. The ability to
> stop a running link is much more needed.)
After updating pdftex i tested that feature (somewhat stupid example as
we don't use this link command in context):

\pdfobjcompresslevel0
\pdfcompresslevel0

\starttext

\vskip1cm

\vskip1cm

\vskip1cm

\vskip1cm

\vskip1cm

\page

here

\stoptext

so, this flag is somewhat unpredictable in the sense that it influences
the next box at the upper level and has no effect in the middle or
preceding (either or not migrated) boxes inside the setting. I looked at
the pdftex source and it's not hard to implement (which also explains
the above behavioir) and we don't need to document it.

Hans

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