No occurence generated with implicit parameter

[tgodzik]

 occurrences(
    """|object O {
       |  implicit val farewell = "farewell"
       |  case class Split() {
       |    def withSingleLine(
       |        expire: Int,
       |        exclude: => Boolean = false,
       |    )(implicit line: String): Int = 1
       |  }
       |  val expireToken = 123
       |  Split().withSingleLine(expireToken)
       |}
    """.stripMargin,
    """|[0:7..0:8): O <= _empty_/O.
       |[1:15..1:23): farewell <= _empty_/O.farewell.
       |[2:13..2:18): Split <= _empty_/O.Split#
       |[2:18..2:18):  <= _empty_/O.Split#`<init>`().
       |[3:8..3:22): withSingleLine <= _empty_/O.Split#withSingleLine().
       |[4:8..4:14): expire <= _empty_/O.Split#withSingleLine().(expire)
       |[4:16..4:19): Int => scala/Int#
       |[5:8..5:15): exclude <= _empty_/O.Split#withSingleLine().(exclude)
       |[5:20..5:27): Boolean => scala/Boolean#
       |[6:15..6:19): line <= _empty_/O.Split#withSingleLine().(line)
       |[6:21..6:27): String => scala/Predef.String#
       |[6:30..6:33): Int => scala/Int#
       |[8:6..8:17): expireToken <= _empty_/O.expireToken.
       |[9:2..9:7): Split => _empty_/O.Split.
       |[9:10..9:24): withSingleLine => _empty_/O.Split#withSingleLine().
       |[9:25..9:36): expireToken => _empty_/O.expireToken.
       |""".stripMargin
  )

gets an error:

=> Diff (- obtained, + expected)
 [9:10..9:24): withSingleLine => _empty_/O.Split#withSingleLine().
-[9:25..9:36): expireToken => local1
+[9:25..9:36): expireToken => _empty_/O.expireToken.

It seems a wrong symbol is being returned here by the compiler.