There is AvroRuntimeException when field is an Option of value class

[liutaon]

There is AvroRuntimeException when field is an Option of value class

import java.io.File
import com.sksamuel.avro4s._

final case class SN(value: String) extends AnyVal // it's ok when remove AnyVal
final case class SimpleUser(name: String, sn: Option[SN])

implicit val schema = AvroSchema[SimpleUser]
val out = AvroOutputStream.data[SimpleUser](new File("tmp.avro"))
out.write(SimpleUser("Tom", Some(SN("123"))))

Environments:
OS: macOS 10.13.4
Java: 1.8.0_161
Scala: 2.12.5

org.apache.avro.AvroRuntimeException: Not a record schema: "string"
  at org.apache.avro.generic.GenericData$Record.<init>(GenericData.java:181)
  at $anon$1$anon$apply$macro$458$1$$anon$2.apply(<console>:53)
  at $anon$1$anon$apply$macro$458$1$$anon$2.apply(<console>:53)
  at com.sksamuel.avro4s.LowPriorityToValue$$anon$2.apply(ToRecord.scala:30)
  at com.sksamuel.avro4s.LowPriorityToValue$$anon$2.apply(ToRecord.scala:29)
  at com.sksamuel.avro4s.ToValue$$anon$8.$anonfun$apply$5(ToRecord.scala:109)
  at scala.Option.map(Option.scala:146)
  at com.sksamuel.avro4s.ToValue$$anon$8.apply(ToRecord.scala:109)
  at com.sksamuel.avro4s.ToValue$$anon$8.apply(ToRecord.scala:108)
  at $anon$1.apply(<console>:53)
  at $anon$1.apply(<console>:53)
  at com.sksamuel.avro4s.AvroDataOutputStream.$anonfun$x$1$2(AvroOutputStream.scala:55)
  at com.sksamuel.avro4s.AvroDataOutputStream.$anonfun$x$1$2$adapted(AvroOutputStream.scala:54)
  at com.sksamuel.avro4s.AvroDataOutputStream.write(AvroOutputStream.scala:66)
  ... 36 elided

[ylabi]

@liutaon did you manage by any chance, to find a workaround for this ?

[sksamuel]

This is now fixed in the 2.0 pre release branch.