read json throws NullPointerException with Scala3 #371
Description
Reading json generated by write throws NullPointerException with Scala3, the same code with Scala2.13 runs without problems.
build.sbt
scalaVersion := "3.1.0" // 2.13.7 works correct, 3.1.0 crashes
libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "1.4.2")Code reproducing the problem
import upickle.default._
object ShowCrash {
case class Node(name: String, kids: Vector[Node])
implicit val nodeRW: ReadWriter[Node] = macroRW[Node]
val ndb = Node("b", Vector.empty)
val nda = Node("a", Vector(ndb))
def main(args: Array[String]): Unit = {
println(s"nda: $nda")
val json = write(nda)
println(s"json: $json")
val node = read[Node](json)
println(s"node: $node")
}
}Fails with:
nda: Node(a,Vector(Node(b,Vector())))
json: {"name":"a","kids":[{"name":"b","kids":[]}]}
[error] (run-main-1) java.lang.NullPointerException
[error] java.lang.NullPointerException
[error] at ujson.CharParser.parseNested(CharParser.scala:401)