Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18813#discussion_r131794346
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
---
@@ -193,7 +193,7 @@ object ScalaReflection extends ScalaReflection {
case _ => UpCast(expr, expected, walkedTypePath)
}
- tpe match {
+ tpe.dealias match {
--- End diff --
This is for `deserializerFor`. `deserializerFor` can call itself. It has
many entrance points. So we need to dealiase its given type parameter.
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