Signature of method taking generic array differs from Scala 2

[som-snytt]

minimized code

class C {
  def f[A](as: Array[A]) = 42
}

Compilation output

$ ~/bin/dotc vargen.scala && javap C
Compiled from "vargen.scala"
public class C {
  public C();
  public <A> int f(A[]);
}

expectation

Compiled from "vargen.scala"
public class C {
  public <A> int f(java.lang.Object);
  public C();
}