Not working for enums of singletons?

[kubukoz]

Hey! I like the library but I'm having some trouble with it.

This results in a compile-time warning, on 3.3.0:

//> using lib "io.github.kitlangton::quotidian:0.0.6"
//> using scala "3.3.0"

import quotidian.*
import scala.quoted.*

enum TokenKind derives ToExpr {
  case EOF
  case Ident
}

Compiling project (Scala 3.3.0, JVM)
[warn] ./macros.scala:7:24
[warn] Unreachable case except for null (if this is intentional, consider writing case null => instead).
[warn] enum TokenKind derives ToExpr {
[warn]  

On 3.3.1, it fails to compile altogether:

//> using lib "io.github.kitlangton::quotidian:0.0.6"
//> using scala "3.3.1"

import quotidian.*
import scala.quoted.*

enum TokenKind derives ToExpr {
  case EOF
  case Ident
}

[warn] ./macros.scala:7:24
[warn] Unreachable case except for null (if this is intentional, consider writing case null => instead).
[warn] enum TokenKind derives ToExpr {
[warn]                        ^
[error] ./macros.scala:7:24
[error] Illegal reference to `scala.quoted.runtime.Expr`
[error] enum TokenKind derives ToExpr {
[error]                        ^
[error] ./macros.scala:7:24
[error] Illegal reference to `scala.quoted.runtime.Expr.quote`
[error] enum TokenKind derives ToExpr {
[error]                        ^

Is this something on my side, or could it be a fault in the library? BTW I remember there was some chatter on this getting inlined into dotty itself, has there been any update on that?