1
trait Foo extends Any { override def equals(x: Any) = false }
2
trait Ding extends Any { override def hashCode = -1 }
4
class Bippy1(val x: Int) extends AnyVal with Foo { } // warn
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class Bippy2(val x: Int) extends AnyVal with Ding { } // warn
8
def main(args: Array[String]): Unit = {
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val b1 = new Bippy1(71)
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val b2 = new Bippy2(71)
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assert(b1 == b1 && b1.## == b1.x.##, ((b1, b1.##)))
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assert(b2 == b2 && b2.## == b2.x.##, ((b2, b2.##)))