Github user yijieshen commented on a diff in the pull request: https://github.com/apache/spark/pull/7365#discussion_r34743636 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala --- @@ -371,7 +371,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w private[this] def castArray(from: ArrayType, to: ArrayType): Any => Any = { val elementCast = cast(from.elementType, to.elementType) - buildCast[Seq[Any]](_, _.map(v => if (v == null) null else elementCast(v))) + buildCast[Seq[Any]](_, seq => seq.map(v => if (v == null) null else elementCast(v))) --- End diff -- ah, change this by accident, will revert in following commit.
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