Macro compilation fails on ScalaJS, ok on JVM

[fede0664]

Edited: Simplified minimized code

Compiler version

Scala 3.8.0-RC1

Output

The macro below fails compiling on ScalaJs. Compiles and run ok on JVM.

scala-cli --cli-version 1.10.1 Client.scala ClientMacro.scala
Compiles and runs ok

scala-cli --cli-version 1.10.1 Client.scala ClientMacro.scala --js
Fails compilation with error:
Error: Cannot resolve delambdafy target method $anonfun at Client.scala:20

Note, both JVM and ScalaJs compile and run on Scala 3.7.4 by adding //> using options -experimental on Client.scala

Minimized code

File Client.scala

//> using scala 3.8.0-RC1
//> using jvm temurin:25
//> using js-version 1.20.1

trait ApiRun:
  def runString(): String

object ClientRunner:
  val exec = Runner()

  def main(args: Array[String]): Unit = println(client.runString())

  inline def client: ApiRun = ${
    ClientMacro.impl('exec)
  }

class Runner():
  def run(lambda: () => String): String = lambda()

File ClientMacro.scala

object ClientMacro:
  import scala.quoted.*

  def impl(runnerImpl: Expr[Runner])(using Quotes): Expr[ApiRun] = implBase(runnerImpl)

  private def implBase(runnerImpl: Expr[Runner])(using Quotes): Expr[ApiRun] =
    import quotes.reflect.*

    val parents = List(TypeTree.of[Object], TypeTree.of[ApiRun])

    val cls = Symbol
      .newClass(
        Symbol.spliceOwner,
        "ApiImpl",
        parents.map(_.tpe),
        cls => List(Symbol.newMethod(cls, "runString", MethodType(Nil)(_ => Nil, _ => TypeRepr.of[String]))),
        selfType = None
      )

    val body = DefDef(cls.declaredMethods.head, _ => Some('{ ${ runnerImpl }.run(() => "ApiImpl.run") }.asTerm))
    val clsDef = ClassDef(cls, parents, body = List(body))
    val newCls = Apply(Select(New(TypeIdent(cls)), cls.primaryConstructor), Nil)
    Block(List(clsDef), newCls).asExprOf[ApiRun]