fun test1(a: Function0<Unit>) {
  when {
    a is Runnable -> { // BLOCK
      runStatic(r = a /*as Runnable */)
    }
  }
}

fun test2(a: Function0<Unit>) {
  when {
    a is Runnable -> { // BLOCK
      J().run1(r = a /*as Runnable */)
    }
  }
}

fun test3(a: Function0<Unit>) {
  when {
    a is Runnable -> { // BLOCK
      J().run2(r1 = a /*as Runnable */, r2 = a /*as Runnable */)
    }
  }
}

fun test4(a: Function0<Unit>, b: Function0<Unit>) {
  when {
    a is Runnable -> { // BLOCK
      J().run2(r1 = a /*as Runnable */, r2 = b /*-> @FlexibleNullability Runnable? */)
    }
  }
}

fun test5(a: Any) {
  when {
    a is Runnable -> { // BLOCK
      J().run1(r = a /*as Runnable */)
    }
  }
}

fun test5x(a: Any) {
  when {
    a is Runnable -> { // BLOCK
      a as Function0<Unit> /*~> Unit */
      J().run1(r = a /*as Runnable */)
    }
  }
}

fun test6(a: Any) {
  a as Function0<Unit> /*~> Unit */
  J().run1(r = a /*as Function0<Unit> */ /*-> @FlexibleNullability Runnable? */)
}

fun test7(a: Function1<Int, Int>) {
  a as Function0<Unit> /*~> Unit */
  J().run1(r = a /*as Function0<Unit> */ /*-> @FlexibleNullability Runnable? */)
}

fun test8(a: Function0<Unit>) {
  J().run1(r = id<@FlexibleNullability Function0<Unit>?>(x = a) /*-> @FlexibleNullability Runnable? */)
}

fun test9() {
  J().run1(r = ::test9 /*-> @FlexibleNullability Runnable? */)
}