$hfind -R (reversed regex) is where regular expression patterns are stored in a hash table, and compared against the normal string passed in the $hfind parameter. $null is the normal string, not an 'unusual pattern'.
Just look at it. It's wrong, and you're wrong. :P
This isn't to say that $hfind() supports $null string parameters -- it doesn't -- but at least grasp the fundamentals of how mIRC works, Ouims!
$hfind() never works in any situation when $null is passed, whether -n -w -W -r -R are specified. This is a limitation of $hfind()
(The $regex qualitative test is still wrong.)
