Bug with Dotty macros?

fileNameMacro.scala

case class FileName private(name: String)

/**
 
 val fileName1: FileName = ToFileName("fileName1")
 
 -- Error: /Users/etorreborre/projects/specs2/specs2-five/common/shared/src/test/scala/org/specs2/io/DirectoryPathSpec.scala:13:38
[error] 13 | val fileName1: FileName = ToFileName("fileName1")
[error]    |                                      ^^^^^^^^^^^
[error]    |             fileName1 is not a valid file name! It must not contain a /
*/

object FileName {
  def unsafe(s: String) = new FileName(s)

  implicit inline def ToFileName(s: String): FileName =
    ${createFileName('{s})}

  def fileNameFromString(s: String): Either[String, FileName] =
    Right(FileName.unsafe(s))

  def createFileName(fileName: Expr[String])(using qctx: QuoteContext): Expr[FileName] =
    fileName match {
      case e@Const(s) =>
        '{fileNameFromString($e) match {
            case Right(fn) =>
              fn
            case Left(_) =>
              ${qctx.throwError(s"$s is not a valid file name! It must not contain a /", fileName)}
         }}

      case _ =>
        qctx.throwError(s"$fileName is not a valid file name. It must be a literal string", fileName)
    }
}