Re: deroff -w and broken input to spell causes misspellings

[RVP <rvp%SDF.ORG@localhost>]

On Tue, 25 Nov 2025, Jeremy C. Reed wrote:

> Today I looked closer and saw that deroff -w was corrupting my non-roff 
> input.
>
> $ jot 1000 | number | grep [a-z] | xargs | tee ~/tmp/long-line | spell
> hree
> hund
> nty
> sevent
> thi
> tw
> ty
> [...]
> Is this a known spell or deroff -w bug causing it to chop my long lines 
> causing misspellings?

This looks like a consequence of using a fixed-size line buffer; then with
chars. > LINE_MAX (2048) bytes, the final words which don't fit'll get chopped.

https://github.com/NetBSD/src/blob/trunk/usr.bin/deroff/deroff.c#L144

> Should I open a gnats ticket for this?

Yes. The simplest thing to do would be to just ditch that fixed-size buffer
and just suck in the entire line. That'll work if you have enough memory.

-RVP