Constructor annotations don't allow multiple argument lists

[scabug]

scala> class ann1(x: Int) extends scala.annotation.StaticAnnotation
defined class ann1

scala> class C @ann1(2) ()
defined class C

scala> class ann2(x: Int)(y: Int) extends scala.annotation.StaticAnnotation
defined class ann2

scala> class C @ann2(2)(3) ()
<console>:1: error: identifier expected but integer literal found.
       class C @ann2(2)(3) ()
                        ^

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-6808?orig=1
Reporter: @xeno-by
Affected Versions: 2.10.0

[scabug]

@paulp said:
If you try to apply that annotation elsewhere, it freely admits to the situation:

<console>:8: warning: Implementation limitation: multiple argument lists on annotations are
currently not supported; ignoring arguments List(3)
       @ann2(2)(3) class C 
        ^
defined class C

[scabug]

@paulp said:
Of course, one would think the time to point out that the second argument list will always be ignored is when you define an annotation with a second argument list, not when you use it.