Ok, without checking, what do you think happens? (List(0): Seq[Int]) match { case _: List[Int] => 1 case _ => 2 }
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It does what I would expect it to... a List[Int] is a Seq[Int].
End of conversation
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It’s “the compiler should do something legible” versus “the compiler should admit as much valid code as possible”, no? My gut reaction is to call this undesirable (though not a bug).
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