func f3x() {
	f := f3[int]
	var x int
	f(x, &x, &x)
	f3(x, &x, &x)
}
*/

func f4[A any, B interface{ []C }, C interface{ *A }](_ A, _ B, c C) {}
func f4x() {
	f := f4[int]
	var x int
	f(x, []*int{}, &x)
	f4(x, []*int{}, &x)
}

func f5[A interface {
	struct {
		b B
		c C
	}
}, B any, C interface{ *B }](x B) A {
	panic(0)
}