kotlin/compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunction.kt

class A {
  fun Int.foo(a: Int = 1): Int {
      return a
  }

  fun test(): String {
      if (1.foo() != 1) return "fail"
      if (1.foo(2) != 2) return "fail"
      return "OK"
  }
}

fun box(): String  {
   return A().test()
}