[pdftex] pdfeTeX: bad interaction of \pdfstartlink...\pdfendlink with \beginR...\endR

[Hartmut Henkel]

On Sun, 26 Dec 2004, Vladimir Volovich wrote:

> There seems to be a bug in interaction of right-to-left features of
> eTeX with pdflink features of pdftex.

yes, tried to localize it: When the horizontal list is reversed
(left/right swapped) by function reverse(), so are the \pdfstartlink and
\pdfendlink whatsits. Then \pdfendlink happens before \pdfstartlink,
causing the error. Tried to swap links from/to both nodes after
reversal, so that the start/end sequence is right, but then the 2nd
error appears:

> This can't happen (copying). error:

This seems to be due to a missing style_node: case in @ @<Case statement
to copy...@>= which might be result from some math node that is
artificially added during reversing the list or not? Copying also the
style_node makes it run. But no idea whether that's the right way to do
it. And there might be more cases like \pdfstartlink and \pdfendlink
that might need a fix.

Regards, Hartmut