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"Internal error: unable to find the outer accessor symbol of ..." when deriving instance for a nested type #449

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notxcain opened this issue Jan 14, 2023 · 2 comments

notxcain commented Jan 14, 2023

Version: 1.12

Reproducer: https://scastie.scala-lang.org/lZwX8BQSThWjL8sEAnSPnw

Member

adamw commented Jan 14, 2023

Seems to be a problem with a combination of classes defined in traits + default field values

Author

notxcain commented Jan 14, 2023

Yes, but it works if you put derivation inside the companion.

trait X {
  case class F(i: Int = 5)
  object F {
    implicit def tc: TC[F] = TC.derive[F]
  }
}

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