Reflection incorrectly matching by-name parameters

I'm trying to detect by-name parameters in a method definition. My approach is based on this question's ByNameParam solution.

Unfortunately, by-name parameters match to TypeRefs for repeated arguments, and vice-versa. See the below code for an example.

I assume that this is not the intended behavior. Is the bug on my end or is there a problem with the Definitions module?

import scala.reflect.runtime.universe._

class X { def x(i: => Int, other: Int*) = i * 2 }

val typeSignature = typeOf[X].member(TermName("x")).typeSignature
val paramTypes = typeSignature match {
  case MethodType(params, _) => params map { _.typeSignature }
}
val repeatedParamDefinition = definitions.RepeatedParamClass
val byNameDefinition = definitions.ByNameParamClass

// prints "Got repeatedParamDefinition" twice
paramTypes map { signature =>
  signature match {
    case TypeRef(_, repeatedParamDefinition, args) =>
      println("Got repeatedParamDefinition")
      args
    case TypeRef(_, byNameDefinition, args) => 
      println("Got byNameDefinition")
      args
  }
}

// Prints "Got byNameDefinition" twice
paramTypes map { signature =>
  signature match {
    case TypeRef(_, byNameDefinition, args) => 
      println("Got byNameDefinition")
      args
    case TypeRef(_, repeatedParamDefinition, args) =>
      println("Got repeatedParamDefinition")
      args
  }
}

Scala Version: 2.11.4 (OpenJDK 64-Bit Server VM, Java 1.8.0_65)