Adding varargs on override method fails to compile

[DieBauer]

Minimized code

import scala.annotation.varargs

trait A {
  def bla(as: String*): Unit
}

object B extends A {
  @varargs
  override def bla(a: String*) = ()
}

Output

sbt:dotty-simple> compile
[info] Compiling 1 Scala source to /Users/Jens/Developer/chapter/dotty/chapter/target/scala-0.27/classes ...
[error] -- [E037] Declaration Error: /Users/Jens/Developer/chapter/dotty/chapter/src/main/scala/Varargs.scala:7:7 
[error] 7 |object B extends A {
[error]   |       ^
[error]   |       method bla overrides nothing
[error] one error found

Expectation

This compiles in scala 2.13, dotty 0.25, but breaks with dotty 0.26+.

Adding the @varargs also to the trait method does solve the issue.

[smarter]

/cc @TheElectronWill

[TheElectronWill]

Seems like the varargs forwarder gets an Override flag when it shouldn't. I'll have a look.