CopySpec eachFile does not visit child specs added with "with"

When using "with" to add a child CopySpec to a Copy task, the eachFile visitor does not visit the files in the child spec. Here is a simple example:

task one(type: Copy) {
    from 'src'
    into 'target'
}

task two(type: Copy) {
    with one
    into 'newtarget'
    eachFile { println("two: $it.name") }
}

Where the `src` directory has some arbitrary files in it. I would expect to see the output lines beginning with `two`, but instead I get:

$ gradle two
:two

BUILD SUCCESSFUL