KT.INVALID_RANGE

Empty range

Reports ranges which are empty. This might be a bug if it is used for instance as a loop condition. This loop will never be triggered then. This might be due to invalid ranges like (10..9) which will cause the loop to never be entered.

Noncompliant Code

Copy

for (i in 2..1) {}
for (i in 1 downTo 2) {}

val range1 = 2 until 1
val range2 = 2 until 2

Compliant Code

Copy

for (i in 2..2) {}
for (i in 2 downTo 2) {}

val range = 2 until 3