ClassCastException: class cannot be cast to class scala.runtime.Nothing$

[jtjeferreira]

Compiler version

Scala 3.6.2, 3.5.2, 3.3.4

Minimized code

import com.fasterxml.jackson.databind.JsonNode
import com.fasterxml.jackson.databind.node.{
  JsonNodeFactory,
  ObjectNode,
  TextNode
}

val json: ObjectNode = JsonNodeFactory.instance.objectNode()

def foo(a: String): Unit = {
  a match {
    case "a" =>
      json.set("type", TextNode.valueOf("value"))
    case _ =>
      json.set("type", TextNode.valueOf("value"))

  }
}
foo("")

method set is a java method:

public <T extends JsonNode> T set(String propertyName, JsonNode value)

https://scastie.scala-lang.org/i507EyzXTdO1BM362YaOhA

Output

Caused by: java.lang.ClassCastException: class com.fasterxml.jackson.databind.node.ObjectNode cannot be cast to class scala.runtime.Nothing$

Expectation

That it does not crash like in scala2 https://scastie.scala-lang.org/gvqImCf7QeKBXahfClCZHA