Bug#458059: [NTG-pdftex] Bug#458059:
Taco Hoekwater wrote:
You are almost certainly right about the nest>2*groups, just with maybe
a small extra delta, like nest>2*groups+2 (because many functions push
the semantic nest before the save stack). I do not want to spend the
time (probably a lot of time) finding out the absolute truth, but I
agree that a nest_size of 600 appears to make the error unreachable.
In (pdf)tex, that is. Not in Aleph|Omega|Luatex, and I am not sure