ForEachOnRange on Range.toList()

[roman-wedemeier]

When i write

fun main() {
    (0..9).toList().forEach { println(it) }
}

Then the part (0..9).toList() is marked with the following message:
detekt - ForEachOnRange: Using the forEach method on ranges has a heavy performance cost. Prefer using simple for loops.

I would expect, that the toList() Method creates a List<Int>, where i can do the forEach safely.

When i write

fun main() {
    val list = (0..9).toList()

    list.forEach { println(it) }
}

no warning comes up (despite another warning complaining the magic number 9, but this is another Story).

Did i understand something wrong?