Possible bug in Scala

possible_bug.scala

package com.reversebackup

import scala.xml._
import scala.xml.transform._
import scala.xml.XML

/*
  This snippet creates two methods: removeAllNamedTagsTransformer & createRewriteRule. 
  They both create a RuleTransformer which removes all tags with a specific name. 
  However, it seems that it doesn't work if the name of the parameter is 'name'. 
  removeAllNamedTagsTransformer(name: String) doesn't do any transformations but the 
  same method named createRewriteRule(label: String) does. If you change the parameter 
  name to something other than 'name' it works. Is this a bug? 
*/

object Main4 {
  
  // This one doesn't work
  def removeAllNamedTagsTransformer(name: String) = {
    new RuleTransformer(new RewriteRule {
      override def transform(n: Node): Seq[Node] = n match {
        case Elem(prefix, `name`, attribs, scope, _*)  => NodeSeq.Empty
        case other => other
      }
    })
  }
  
  // This one works. 
  def createRewriteRule(label: String) = { 
    new RuleTransformer(new RewriteRule {
      override def transform(n: Node): Seq[Node] = n match {
        case Elem(prefix, `label`, attribs, scope, _*)  => NodeSeq.Empty
        case other => other
      }
    })
  }
    
  def main(args: Array[String]): Unit = {
    val data1 = (xml \\ "person").map(createRewriteRule("id"))
    val data2 = (xml \\ "person").map(removeAllNamedTagsTransformer("id"))
    println(data1 == data2)
  }
  
  val xml = <people type="array"><person>
      <author-id type="integer">443736</author-id>
      <background nil="true"></background>
      <company-id type="integer">64676331</company-id>
      <created-at type="datetime">2011-03-17T10:13:50Z</created-at>
      <first-name>Mads</first-name>
      <group-id nil="true" type="integer"></group-id>
      <id type="integer">64723802</id>
      <last-name>Hartmann Jensen</last-name>
      <owner-id nil="true" type="integer"></owner-id>
      <title>Software Developer</title>
      <updated-at type="datetime">2011-03-17T19:18:19Z</updated-at>
      <visible-to>Everyone</visible-to>
  <contact-data>
    <phone-numbers type="array"></phone-numbers>
    <addresses type="array"></addresses>
    <email-addresses type="array">
      <email-address>
        <address>[email protected]</address>
        <id type="integer">31204049</id>
        <location>Work</location>
      </email-address>
      <email-address>
        <address>[email protected]</address>
        <id type="integer">31204050</id>
        <location>Home</location>
      </email-address>
    </email-addresses>
    <web-addresses type="array"></web-addresses>
    <instant-messengers type="array"></instant-messengers>
    <twitter-accounts type="array"></twitter-accounts>
  </contact-data>
    </person>
  </people>
}

Comment from Rex on the scala-language ML:

The API for RewriteRule includes:

val name : String

a name for this rewrite rule

so the variable name that you passed in is no longer the one used in that scope.

It's not a bug; it's just a standard name collision.