error in context variables for sub query?

[publicocean0]

I build this simplified query for show the error
I have a class with hierarchy : parent is the field to trasverse.
#93:13 has a child.
but
select from #93:13 let $p = @Rid where scope = #65:1 and @Rid <> #93:14 and ( select count() as count from (traverse parent from #93:13 ) where parent = #93:14 ) contains (count = 0)
is correct
but
select from #93:13 let $p = @Rid where scope = #65:1 and @Rid <> #93:14 and ( select count() as count from (traverse parent from #93:13 ) where parent = $p ) contains (count = 0)
is wrong
the query might give the same result cause in this simplified query $p = #93:13

[lvca]

contexts are per context of execution, so the sub-query can't see $p created 2 level up. Try this:

select from #93:13 
  let $p = @rid 
  where scope = #65:1 and @rid <> #93:14 and (
    select count() as count from (
     traverse parent from #93:13
    ) where parent = $parent.$parent.$p 
   ) contains (count = 0)

[publicocean0]

thank you very much :)