> Anything that means troff isn't first in the pipeline causes groff's
> pipeline.c to trample troff's FD 0.
>
> $ groff -V -Tascii <(printf 'a\n.rd\nb\n')
> troff -Tascii /dev/fd/63 | grotty
> $ groff -V -Tascii -t <(printf 'a\n.rd\nb\n')
> tbl /dev/fd/63 | troff -Tascii | grotty
> $
>
> It seems [gn]roff's pipelining building can be incompatible with
> .rd.
Since .rd use stdin, isn't it incompatible in general with pipelining?
> Should this be noted somewhere, including outside of TeXinfo.
Could you provide a patch?
Werner
