File: caseinherit.check

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caseinherit.scala:2: error: case class `class B' has case ancestor `class A'.  Case-to-case inheritance has potentially dangerous bugs which are unlikely to be fixed.  You are strongly encouraged to instead use extractors to pattern match on non-leaf nodes.
case class B(y: Int) extends A(y)
           ^
caseinherit.scala:3: error: case class `object Bippy' has case ancestor `class A'.  Case-to-case inheritance has potentially dangerous bugs which are unlikely to be fixed.  You are strongly encouraged to instead use extractors to pattern match on non-leaf nodes.
case object Bippy extends A(55)
            ^
caseinherit.scala:6: error: case class `class Dingus' has case ancestor `class A'.  Case-to-case inheritance has potentially dangerous bugs which are unlikely to be fixed.  You are strongly encouraged to instead use extractors to pattern match on non-leaf nodes.
case class Dingus(y: Int) extends Innocent
           ^
three errors found