Scaladoc crashes when creating page for abstract types

[Atry]

package p 
private[p] trait T {
  /** @template */
  type A
}
object O extends T

$ scaladoc -version
Scaladoc version 2.12.2 -- Copyright 2002-2017, LAMP/EPFL and Lightbend, Inc.

$ scaladoc O.scala 
Exception in thread "main" java.lang.RuntimeException: 'type A' isn't a class, trait or object thus cannot be built as a member template.
	at scala.sys.package$.error(package.scala:27)
	at scala.tools.nsc.doc.model.ModelFactory$modelCreation$.createNoDocMemberTemplate$1(ModelFactory.scala:711)
	at scala.tools.nsc.doc.model.ModelFactory$modelCreation$.createLazyTemplateMember(ModelFactory.scala:727)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.$anonfun$completeModel$2(ModelFactory.scala:381)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.completeModel(ModelFactory.scala:381)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.$anonfun$completeModel$1(ModelFactory.scala:377)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.completeModel(ModelFactory.scala:375)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.$anonfun$completeModel$1(ModelFactory.scala:377)
	at scala.tools.nsc.doc.model.ModelFactory$DocTemplateImpl.completeModel(ModelFactory.scala:375)
	at scala.tools.nsc.doc.model.ModelFactory.makeModel(ModelFactory.scala:55)
	at scala.tools.nsc.doc.DocFactory.makeUniverse(DocFactory.scala:81)
	at scala.tools.nsc.doc.DocFactory.generate$1(DocFactory.scala:124)
	at scala.tools.nsc.doc.DocFactory.document(DocFactory.scala:131)
	at scala.tools.nsc.ScalaDoc.process(ScalaDoc.scala:41)
	at scala.tools.nsc.ScalaDoc$.main(ScalaDoc.scala:92)
	at scala.tools.nsc.ScalaDoc.main(ScalaDoc.scala)