Codegen fails when xxHash seed is not an integer

import org.apache.spark.sql.catalyst.expressions.XxHash64
import org.apache.spark.sql.Column

val file = "..."
val column = col("...")

val df = spark.read.csv(file)

def xxHash(seed: Long, cols: Column*): Column = new Column(
   XxHash64(cols.map(_.expr), seed)
)

val seed = (Math.pow(2, 32)+1).toLong
df.select(xxHash(seed, column)).show()