Re: PDF builds broken again

Magnus Hagander <magnus(at)hagander(dot)net> writes:
> On Wed, Jul 23, 2014 at 12:31 PM, Magnus Hagander <magnus(at)hagander(dot)net> wrote:
>> ! pdfTeX error (ext4): \pdfendlink ended up in different nesting level than \pd

> Additional point of info - the -US pdf's do build on this version,
> just not the -A4.

> And with even more of those entries about overfull hbox, so clearly
> that was not the actual breakage.

Yeah. What this actually is is the symptom of <link> text crossing a page
boundary. The patch you made did not fix the problem (because there's no
hyperlink anywhere in that para); you just moved the problematic line
pair, which must be somewhere below here, up or down so it didn't fall
across a page break.

A more robust fix would be to identify the para where the problem actually
is and re-word it so that the link doesn't cross a *line* boundary (in
either US or A4). That makes it safe as long as that particular para
doesn't get reworded in future; whereas with what you did, addition or
subtraction of a line anywhere in a pretty broad range could resurrect
the issue.

Of course, it would be a lot better if the toolchain didn't have this
limitation (or at least managed to report it more usefully). I'm not
holding my breath for that to happen though.

regards, tom lane