[perl #60886] undef & undef ~~ undef returns False in Rakudo

[Vasily Chekalkin via RT]

On Thu Nov 27 14:16:17 2008, masak wrote:
> <masak> rakudo: say undef ~~ undef; say undef & undef ~~ undef
> <p6eval> rakudo 33276: OUTPUT[1␤0␤]
> <masak> what's going on there?
> <moritz_> rakudobug!
> <masak> finally :)

Actually, it's just lack of Junction autothreading. Becasue (undef &
undef) creates Junction which is defined.

-- 
Bacek