compiler crash with pattern match against local val

[scabug]

While investigating Ticket #5, I ran across the following variation which crashes the compiler:

object A1 {
 object A2 {
   class X { def unapply(v : Int) = Some(v + 1) }
 }
}

object C {
  def main(args: Array[String]) {
    val q = new A1.A2.X
    val res = 5 match { case q(x) => x }
    println(res)
  }
}

The stack trace is:

Exception in thread "main" java.lang.Error: Unknown type: (Array[java.lang.String])Unit
        at scala.tools.nsc.Global.abort(Global.scala:155)
        at scala.tools.nsc.backend.icode.TypeKinds$$class.toTypeKind(TypeKinds.scala:449)
        at scala.tools.nsc.backend.icode.ICodes.toTypeKind(ICodes.scala:20)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:600)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.genLoadQualifier(GenICode.scala:1062)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:900)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.genLoadQualifier(GenICode.scala:1062)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:833)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:410)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genStat(GenICode.scala:179)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$1.apply(GenICode.scala:142)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$1.apply(GenICode.scala:141)
        at scala.List.foreach(List.scala:730)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.genStat(GenICode.scala:141)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:947)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:410)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genStat(GenICode.scala:179)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$1.apply(GenICode.scala:142)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$1.apply(GenICode.scala:141)
        at scala.List.foreach(List.scala:730)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.genStat(GenICode.scala:141)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.scala$$tools$$nsc$$backend$$icode$$GenICode$$ICodePhase$$$$genLoad(GenICode.scala:947)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:110)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$0.apply(GenICode.scala:68)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$0.apply(GenICode.scala:68)
        at scala.List.foreach(List.scala:730)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:68)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:132)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:86)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$0.apply(GenICode.scala:68)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase$$$$anonfun$$0.apply(GenICode.scala:68)
        at scala.List.foreach(List.scala:730)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:68)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:78)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.gen(GenICode.scala:64)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.apply(GenICode.scala:60)
        at scala.tools.nsc.Global$$GlobalPhase.applyPhase(Global.scala:249)
        at scala.tools.nsc.Global$$GlobalPhase$$$$anonfun$$2.apply(Global.scala:238)
        at scala.tools.nsc.Global$$GlobalPhase$$$$anonfun$$2.apply(Global.scala:238)
        at scala.Iterator$$class.foreach(Iterator.scala:375)
        at scala.collection.mutable.ListBuffer$$$$anon$$0.foreach(ListBuffer.scala:255)
        at scala.tools.nsc.Global$$GlobalPhase.run(Global.scala:238)
        at scala.tools.nsc.backend.icode.GenICode$$ICodePhase.run(GenICode.scala:53)
        at scala.tools.nsc.Global$$Run.compileSources(Global.scala:534)
        at scala.tools.nsc.Global$$Run.compile(Global.scala:615)
        at scala.tools.nsc.Main$$.process(Main.scala:86)
        at scala.tools.nsc.Main$$.main(Main.scala:107)
        at scala.tools.nsc.Main.main(Main.scala)

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-48?orig=1
Reporter: @lexspoon

[scabug]

@lexspoon said:
I have committed a test file as test/pending/run/bugtr0048.scala.

[scabug]

@lexspoon said:
I have renamed the regression test to t0048.scala to match convention.

[scabug]

@burakemir said:
was also fixed in r12795

[scabug]

@burakemir said:
(since it was related to #44)

[scabug]

@odersky said:
Milestone 2.6.1 deleted