Wrong constructor type for trait constructor with implicits

[nicolasstucki]

trait Foo(implicit n: Int)
class Bar extends Foo(1)

fails with

2 |class Bar extends Foo(1)
  |                      ^
  |                      too many arguments for constructor Foo: ()(implicit n: Int)Foo

[nicolasstucki]

The original code that I was trying to compile was something like this

trait Foo[T: ClassTag]
class Bar extends Foo[Int]

[nicolasstucki]

Currently a workaround is to put the non implicit parameters of the constructor explicitly

trait Foo()(implicit n: Int)
class Bar extends Foo()(1)

[odersky]

This is actually a duplicate of #2576.