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Call inhabited for AppliedType recursively #23964

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Merged
merged 1 commit into from
Sep 23, 2025
Merged

Call inhabited for AppliedType recursively #23964

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1 change: 1 addition & 0 deletions compiler/src/dotty/tools/dotc/transform/patmat/Space.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -702,6 +702,7 @@ object SpaceEngine {
case OrType(tp1, tp2) => inhabited(tp1) || inhabited(tp2)
case tp: RefinedType => inhabited(tp.parent)
case tp: TypeRef => !containsUninhabitedField(tp) && inhabited(tp.prefix)
case tp: AppliedType => !containsUninhabitedField(tp) && inhabited(tp.tycon)
case _ => !containsUninhabitedField(tp)

if inhabited(refined) then refined
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18 changes: 18 additions & 0 deletions tests/pos/i23734.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
trait Nodes1 {
sealed trait B
final case class R1() extends B
}

trait Nodes2 extends Nodes1 {
final case class R2[T]() extends B
}


object Impl1 extends Nodes1

object test2 {
val a: Impl1.B = ???
a match {
case Impl1.R1() => ???
}
}
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