> So here is a patch that fixes the bug.
> The patch survives /usr/src/regress/usr.bin/grep
> but apart from that, it's not really tested yet.
> 
> Given how sloppy people who are used to Linux tend to be,
> i worry that this might cause half the ports tree to crumble,
> so i'm not sure whether i should really propose fixing this bug.

I agree that this is a bug and would prefer to get it fixed, but we
probably want to run a ports bulk build with that diff first.