companion expansion through macro annotation stop working in scaladoc compile 2.13-M4

[kailuowang]

Example project created here:
https://github.com/kailuowang/simulacrum_213

It uses simulacrum’s @typeclass annotation which expands the companion with some extra methods.

@typeclass
trait TC[A]

object TC {
  implicit val stingTC: TC[String] = null
}

object Test {
  val c = TC[String] //fails on `sbt doc` on 2.13.0-M4
}

It works fine in sbt compile, it also works fine on sbt doc on Scala 2.12

cc @mpilquist

[SethTisue]

error:

[error] /Users/tisue/simulacrum_213/src/main/scala/example/Test.scala:13:13: object TC does not take type parameters.
[error]   val c = TC[String] //fails on `sbt doc` on 2.13.0-M4
[error]             ^

[SethTisue]

a smaller reproducer is:

@simulacrum.typeclass trait TC[A]
object Test { TC }

as with the longer example, it compiles, but there is an error when doc is run:

[error] /Users/tisue/simulacrum_213/src/main/scala/example/Test.scala:2:15: not found: value TC
[error] object Test { TC }
[error]               ^

[SethTisue]

@adriaanm orange alert in macro paradise wing

[Atry]

Related to typelevel/simulacrum#82