Actually, seems this is not a kotlinx-datetime question:

val a = 5..1
val b = 6..1

// true
println(a == b)

I guess in one way I can see this, as no value can fall between start and end, therefore the ranges are in effect empty and equal. But its still a bit surprising. Especially when one looks at the implementation of

ComparableRange.equals

, its checking equality of

start

and

endInclusive

, which would cause that equality to be false.

Ah yes, there is a check there for

isEmpty

. Ok!