uquery 'intersect' and 'except' do not accept any value

[hdgarrood]

The docs hosted at https://buck2.build/docs/users/query/uquery/ state that intersect and except accept any value, but they appear to only work with target sets. For example, using the structure produced by buck2 init --git, with the following BUCK file:

# A list of available rules and their signatures can be found here: https://buck2.build/docs/prelude/globals/

genrule(
    name = "hello_world",
    out = "out.txt",
    cmd = "echo BUILT BY BUCK2> $OUT",
)

$ buck2 --version
buck2 2025-05-06-201beb86106fecdc84e30260b0f1abb5bf576988
$ buck2 uquery 'inputs(//:hello_world) intersect inputs(//:hello_world)'
Error evaluating expression:
    inputs(//:hello_world) intersect inputs(//:hello_world)
    ^-----------------------------------------------------^


Caused by:
    expected value of type `target_set`, got `FileSet`:
        inputs(//:hello_world) intersect inputs(//:hello_world)
                                         ^--------------------^
    
Build ID: d0276bfb-b46c-402c-a91b-8d82877ad5db
Command: query.                                                                                                                     
Time elapsed: 0.0s

I get the same result with except, but curiously union does work. I get the same behaviour with cquery as well.