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Take the high bound in extension check #23294

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Take the high bound in extension check #23294

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2 changes: 1 addition & 1 deletion compiler/src/dotty/tools/dotc/typer/RefChecks.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1180,7 +1180,7 @@ object RefChecks {
def targetOfHiddenExtension: Symbol =
val target =
val target0 = explicitInfo.firstParamTypes.head // required for extension method, the putative receiver
target0.dealiasKeepOpaques.typeSymbol.info
target0.dealiasKeepOpaques.typeSymbol.info.hiBound
val member = target.nonPrivateMember(sym.name)
.filterWithPredicate: member =>
member.symbol.isPublic && memberHidesMethod(member)
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4 changes: 4 additions & 0 deletions tests/warn/i23293.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@

trait SelectByName[Field <: String & Singleton, Rec <: Tuple]:
type Out
extension (r: Rec) def apply[F <: Field]: Out // warn not crash
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