I'm unable to add two

BigInteger

s, both when I use

+

and

plus()

. I get a compiler error about overload ambiguity: <https://ss.nohus.eu/14331/03576c27> How to fix this error? This does not compile:

fun main() {
    BigInteger.ONE + BigInteger.ONE
}

Where did you define your extension for the plus operator of

BigInteger

? You might have two definitions of it

I haven't, there is one by default in Kotlin (in

BigIntegers.kt

)

Oh, I didn’t know it was defined there, my bad. If you try to navigate to the source of the

+

sign, does it lead to two methods?

It leads to one, not sure how to find the second one, it seems the error points twice to the same one.

try to 1. optimize imports (ctrl + alt + o) 2. type BigInteger.ONE.plus and look on autocomplete

import java.math.BigInteger

fun main() {
    BigInteger.ONE.plus(BigInteger.ONE)
}

Same error, this is the entire file. Does it compile for other people? Any other ideas?

Works fine on my machine

~ > kotlinc-jvm
Welcome to Kotlin version 1.3.61 (JRE 1.8.0_141-b15)
Type :help for help, :quit for quit
>>> import java.math.BigInteger
>>> BigInteger.ONE.plus(BigInteger.ONE)
res1: java.math.BigInteger = 2

This might be due to having multiple version of the Kotlin Stdlib in the classpath, hence the duplicate extension.