gistfile1.txt

/tmp/return> scalac -version
Scala compiler version 2.10.2 -- Copyright 2002-2013, LAMP/EPFL
/tmp/return> java -version
java version "1.7.0_15"
Java(TM) SE Runtime Environment (build 1.7.0_15-b03)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
/tmp/return> echo "object Return { def test(oi:Option[Int]):Option[String] = oi.map(i => return Some(i.toString)) }" > return.scala
/tmp/return> scalac return.scala 
/tmp/return> scalac -optimize return.scala 
error: could not find init in: Return.test
error: uncaught exception during compilation: scala.reflect.internal.FatalError
error: scala.reflect.internal.FatalError: 
     while compiling: return.scala
        during phase: dce
     library version: version 2.10.2
    compiler version: version 2.10.2
  reconstructed args: -Ydead-code -optimise -Yinline -Yclosure-elim -Yinline-handlers

  last tree to typer: Ident(nonLocalReturnKey1$1)
              symbol: value nonLocalReturnKey1$1 (flags: <param> <synthetic> <triedcooking>)
   symbol definition: nonLocalReturnKey1$1: Object
                 tpe: Object
       symbol owners: value nonLocalReturnKey1$1 -> constructor Return$$anonfun$test$1 -> anonymous class anonfun$test$1 -> package <empty>
      context owners: anonymous class anonfun$test$1 -> package <empty>

== Enclosing template or block ==

Template( // val <local $anonfun>: <notype>, tree.tpe=anonfun$test$1
  "scala.runtime.AbstractFunction1", "scala.Serializable" // parents
  ValDef(
    private
    "_"
    <tpt>
    <empty>
  )
  // 4 statements
  DefDef( // final def apply(i: Int): Nothing
    <method> final <triedcooking>
    "apply"
    []
    // 1 parameter list
    ValDef( // i: Int
      <param> <triedcooking>
      "i"
      <tpt> // tree.tpe=Int
      <empty>
    )
    <tpt> // tree.tpe=Nothing
    Throw( // tree.tpe=Nothing
      Apply( // def <init>(key: Object,value: Object): scala.runtime.NonLocalReturnControl in class NonLocalReturnControl, tree.tpe=scala.runtime.NonLocalReturnControl
        new runtime.NonLocalReturnControl."<init>" // def <init>(key: Object,value: Object): scala.runtime.NonLocalReturnControl in class NonLocalReturnControl, tree.tpe=(key: Object, value: Object)scala.runtime.NonLocalReturnControl
        // 2 arguments
        Return$$anonfun$test$1.this."nonLocalReturnKey1$1" // val nonLocalReturnKey1$1: Object, tree.tpe=Object
        Apply( // def <init>(x: Object): Some in class Some, tree.tpe=Some
          new Some."<init>" // def <init>(x: Object): Some in class Some, tree.tpe=(x: Object)Some
          Apply( // def toString(): String in class Object, tree.tpe=String
            scala.Int.box(i)."toString" // def toString(): String in class Object, tree.tpe=()String
            Nil
          )
        )
      )
    )
  )
  DefDef( // final def apply(v1: Object): Object
    <method> final <bridge>
    "apply"
    []
    // 1 parameter list
    ValDef( // v1: Object
      <param> <triedcooking>
      "v1"
      <tpt> // tree.tpe=Object
      <empty>
    )
    <tpt> // tree.tpe=Object
    Apply( // final def apply(i: Int): Nothing, tree.tpe=Nothing
      Return$$anonfun$test$1.this."apply" // final def apply(i: Int): Nothing, tree.tpe=(i: Int)Nothing
      Apply( // def unbox(x: Object): Int in object Int, tree.tpe=Int
        "scala"."Int"."unbox" // def unbox(x: Object): Int in object Int, tree.tpe=(x: Object)Int
        "v1" // v1: Object, tree.tpe=Object
      )
    )
  )
  ValDef( // val nonLocalReturnKey1$1: Object
    private <local> <synthetic> <paramaccessor> <triedcooking> <notprotected> <notprivate>
    "nonLocalReturnKey1$1"
    <tpt> // tree.tpe=Object
    <empty>
  )
  DefDef( // def <init>(nonLocalReturnKey1$1: Object): anonfun$test$1
    <method> <triedcooking>
    "<init>"
    []
    // 1 parameter list
    ValDef( // nonLocalReturnKey1$1: Object
      <param> <synthetic> <triedcooking>
      "nonLocalReturnKey1$1"
      <tpt> // tree.tpe=Object
      <empty>
    )
    <tpt> // tree.tpe=anonfun$test$1
    Block( // tree.tpe=Unit
      // 2 statements
      Assign( // tree.tpe=Unit
        Return$$anonfun$test$1.this."nonLocalReturnKey1$1" // val nonLocalReturnKey1$1: Object, tree.tpe=Object
        "nonLocalReturnKey1$1" // nonLocalReturnKey1$1: Object, tree.tpe=Object
      )
      Apply( // def <init>(): scala.runtime.AbstractFunction1 in class AbstractFunction1, tree.tpe=scala.runtime.AbstractFunction1
        Return$$anonfun$test$1.super."<init>" // def <init>(): scala.runtime.AbstractFunction1 in class AbstractFunction1, tree.tpe=()scala.runtime.AbstractFunction1
        Nil
      )
      ()
    )
  )
)

== Expanded type of tree ==

TypeRef(TypeSymbol(class Object extends ))

could not find init in: Return.test
  at scala.reflect.internal.SymbolTable.abort(SymbolTable.scala:49)
	at scala.tools.nsc.Global.abort(Global.scala:254)
	at scala.tools.nsc.backend.opt.DeadCodeElimination$DeadCode.scala$tools$nsc$backend$opt$DeadCodeElimination$DeadCode$$findInstruction(DeadCodeElimination.scala:428)
	at scala.tools.nsc.backend.opt.DeadCodeElimination$DeadCode.mark(DeadCodeElimination.scala:250)
	at scala.tools.nsc.backend.opt.DeadCodeElimination$DeadCode.dieCodeDie(DeadCodeElimination.scala:94)
	at scala.tools.nsc.backend.opt.DeadCodeElimination$DeadCode.analyzeClass(DeadCodeElimination.scala:51)
	at scala.tools.nsc.backend.opt.DeadCodeElimination$DeadCodeEliminationPhase.apply(DeadCodeElimination.scala:38)
	at scala.tools.nsc.backend.icode.ICodes$ICodePhase$$anonfun$apply$2.apply(ICodes.scala:119)
	at scala.tools.nsc.backend.icode.ICodes$ICodePhase$$anonfun$apply$2.apply(ICodes.scala:119)
	at scala.collection.mutable.LinkedHashSet.foreach(LinkedHashSet.scala:87)
	at scala.tools.nsc.backend.icode.ICodes$ICodePhase.apply(ICodes.scala:119)
	at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:464)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:431)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:431)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:431)
	at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1583)
	at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1557)
	at scala.tools.nsc.Global$Run.compileSources(Global.scala:1553)
	at scala.tools.nsc.Global$Run.compile(Global.scala:1662)
	at scala.tools.nsc.Driver.doCompile(Driver.scala:33)
	at scala.tools.nsc.Main$.doCompile(Main.scala:79)
	at scala.tools.nsc.Driver.process(Driver.scala:54)
	at scala.tools.nsc.Driver.main(Driver.scala:67)
	at scala.tools.nsc.Main.main(Main.scala)

/tmp/return>