AssertionError in compiler

https://scastie.scala-lang.org/OlegYch/BlI4CHhuSGOBXIQdlRJcwg/2

import com.softwaremill.macwire._

case class Config(redis: Int)
case class B(redis: Int)
trait MacWireComponents2 {
  def int: Int
  lazy val config = wire[Config]
  lazy val b   = {
    val redis = config.redis
    B(redis)
  }
}

throws

[error] java.lang.AssertionError: assertion failed:
[error]   transformCaseApply: name = config tree = config / class scala.reflect.internal.Trees$Ident
[error]      while compiling: MacWireComponents2.scala
[error]         during phase: refchecks
[error]      library version: version 2.13.1
[error]     compiler version: version 2.13.1

adding explicit type to config works around it

Start with the Scala 2.13.1 reproducer linked in the issue and inspect the compiler failure during the refchecks phase, especially the transformCaseApply assertion for config. Verify the example and the explicit-type workaround, then confirm that the original code compiles without an AssertionError.