[basex-talk] empty() behaves differently on 7.8.2

[Marco Lettere]

Hello all,
I'm pretty puzzled by the following fact. On version 7.8 the following 
code returns true() (which btw is what I expect to be right)

let $a := ()
return empty($a)

whereas in 7.8.2 it returns false().

Any advice?
Thanks,
M.