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correctly eliminate common subcondition involving irrefutable extractors #6077

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scabug opened this issue Jul 13, 2012 · 3 comments
Closed

correctly eliminate common subcondition involving irrefutable extractors #6077

scabug opened this issue Jul 13, 2012 · 3 comments

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@scabug
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@scabug scabug commented Jul 13, 2012

class LiteralNode(val value: Any)

object LiteralNode {
  def unapply(n: LiteralNode) = Some(n.value)
}

object Test extends App {
  ((new LiteralNode(false)): Any) match {
    case LiteralNode(true)  => println("uh-oh")
    case LiteralNode(false) => println("ok")
  }
}

causes a MatchError because the extractor call is factored out incorrectly

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@scabug scabug commented Jul 13, 2012

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@scabug scabug commented Jul 13, 2012

@adriaanm said:
caused by #4691

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@scabug scabug commented Jul 16, 2012

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