synthetic toString for varargs case class is grotesque (reveals WrappedArray)

[scabug]

scala> case class Foo(x: Int, ys: Int*)
defined class Foo

scala> Foo(5)
res0: Foo = Foo(5,WrappedArray())

scala> Foo(5, 10)
res1: Foo = Foo(5,WrappedArray(10))

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-7735?orig=1
Reporter: @paulp

[scabug]

@retronym said:
We can't iterate through the elements and print them in general, given that we might have been constructed with:

  Foo(1, Stream.from(2): _*)

With this in mind, we might think about special casing WrappedArray to explode its elements. I'm not a fan of that inconsistency though.

[SethTisue]

@retronym I'm pretty tempted to close this as hardly even worth addressing