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[Scala 3] derived instances are not stack-safe #476

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Tracked by #481
TimWSpence opened this issue May 24, 2022 · 0 comments
Open
Tracked by #481

[Scala 3] derived instances are not stack-safe #476

TimWSpence opened this issue May 24, 2022 · 0 comments
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@TimWSpence
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The following derivations are not stack-safe:

  • Functor
  • Contravariant

This is because the shapeless 3 ErasedXXXInstances#map has mutual recursion between the Product and Coproduct instances when dealing with recursive sum types like List
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@joroKr21 @TimWSpence