Can't call io.circe.yaml.parser.parse on an input stream reader in 0.15.1

[Thrillpool]

If you try to do

io.circe.yaml.parser.parse(new InputStreamReader(null))

Then you get a compilation error

type mismatch;
 found   : java.io.InputStreamReader
 required: String

I would imagine this change to be responsible d3d0907#diff-f063ea063fa1652fe54e2ad024f6209661708310bfbaf78c7b303fbc7095db2aR12

Though I don't see all the details.

If you replace io.circe.yaml.parser.parse with Parser.default.parse i.e. its definition, it compiles fine.

Edit - I think issue is basically this

object X extends App {
  B.f(0)
}

trait A {
  def f(x: String): String
}

package object B extends A {
  def f(x: Int): String = ???
  def f(x: String): String = ???
}

Edit - I suppose it's pertinent to say I am using scala 2.12

[mmvpm]

the same for scala-2.13.13 and circe-yaml-1.15.0

[timw]

Still broken in scala-2.13.18 with circe-yaml-1.16.1

0.14.x are fine (as they don't have the package object extending the trait).

[timw]

Asked about this on Scala Users and have some level of confirmation that this is a Scala bug.

The parse(Reader) method on the parser package object is the documented way to use the API, so this is pretty broken.
I've confirmed this will fail to compile from within the circe-yaml codebase (e.g. if attempted in a unit test).