kotlin/compiler/testData/diagnostics/tests/tailRecursionComplex.kt

object O {
    // This is correct, foo is the same
    tailrec fun foo(i: Int): Int = if (i < 0) 0 else O.foo(i - 1)
}

class A {
    <!NO_TAIL_CALLS_FOUND!>tailrec fun foo(i: Int)<!> = if (i < 0) 0 else A.foo(i - 1)

    companion object {
        fun foo(i: Int) = 42 + i
    }
}

class B {
    <!NO_TAIL_CALLS_FOUND!>tailrec fun foo(i: Int)<!> = if (i < 0) 0 else O.foo(i - 1)
}