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sergey-scherbina/Monads.scala

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While I was doing exercises from book "Functional programming in Scala", it seems as I caught a bug in Scala's compiler. It is thrown in both 2.10.3 and 2.10.4-RC1.
Raw
build.sbt
scalaVersion := "2.10.4-RC1"
Raw
Monads.scala
object Monads {
trait Functor[F[_]] {
def map[A, B](fa: F[A])(f: A => B): F[B]
}
trait Monad[M[_]] extends Functor[M] {
self =>
def unit[A](a: => A): M[A]
def flatMap[A, B](ma: M[A])(f: A => M[B]): M[B] =
compose[Unit, A, B](_ => ma, f)()
def map[A, B](ma: M[A])(f: A => B): M[B] =
flatMap(ma)(a => unit(f(a)))
def map2[A, B, C](ma: M[A], mb: M[B])(f: (A, B) => C): M[C] =
flatMap(ma)(a => map(mb)(b => f(a, b)))
def sequence[A](lma: List[M[A]]): M[List[A]] =
traverse(lma)(flatMap(_)(unit(_)))
def traverse[A, B](la: List[A])(f: A => M[B]): M[List[B]] =
map(la.foldLeft(unit(List[B]()))((m, a) =>
flatMap(m)(x => map(f(a))(_ :: x))))(_.reverse)
def replicateM[A](n: Int, ma: M[A]): M[List[A]] =
map(ma)(List.fill(n)(_))
def factor[A, B](ma: M[A], mb: M[B]): M[(A, B)] =
map2(ma, mb)((_, _))
def cofactor[A, B](e: Either[M[A], M[B]]): M[Either[A, B]] =
e match {
case Left(ma) => map(ma)(Left(_))
case Right(mb) => map(mb)(Right(_))
}
def compose[A, B, C](f: A => M[B], g: B => M[C]): A => M[C] =
a => flatMap(f(a))(g)
}
val optMonad = new Monad[Option] {
def unit[A](a: => A): Option[A] = Option(a)
override def flatMap[A, B](ma: Option[A])(f: A => Option[B]) =
ma match {
case None => None
case Some(a) => f(a)
}
}
val listMonad = new Monad[List] {
def unit[A](a: => A): List[A] = List(a)
override def flatMap[A, B](ma: List[A])(f: A => List[B]): List[B] =
ma.flatMap(f)
}
case class Id[A](value: A)
val idMonad = new Monad[Id] {
def unit[A](a: => A): Id[A] = Id(a)
override def flatMap[A, B](ma: Id[A])(f: A => Id[B]): Id[B] = f(ma.value)
}
case class Reader[R, A](run: R => A)
object Reader extends {
def readerMonad[R] = new Monad[({type f[x] = Reader[R, x]})#f] {
def unit[A](a: => A): Reader[R, A] = Reader(_ => a)
override def flatMap[A, B](st: Reader[R, A])(f: A => Reader[R, B]): Reader[R, B] =
Reader(r => f(st.run(r)).run(r))
}
}
def eitherMonad[E] = new Monad[({type f[x] = Either[E, x]})#f] {
def unit[A](a: => A) = Right(a)
override def flatMap[A, B](ma: Either[E, A])(f: (A) => Either[E, B]): Either[E, B] =
ma match {
case Right(a) => f(a)
case Left(left) => Left(left)
}
}
}
Raw
stdout
compiler.bug $ sbt clean compile
[info] Loading global plugins from /Users/sergey/.sbt/0.13/plugins
[info] Set current project to compiler-bug (in build file:/Users/sergey/work/projects/scala/compiler.bug/)
[success] Total time: 0 s, completed 01.01.2014 17:02:27
[info] Updating {file:/Users/sergey/work/projects/scala/compiler.bug/}compiler-bug...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/sergey/work/projects/scala/compiler.bug/target/scala-2.10/classes...
while compiling: /Users/sergey/work/projects/scala/compiler.bug/Monads.scala
during phase: global=lambdalift, atPhase=constructors
library version: version 2.10.4-RC1
compiler version: version 2.10.4-RC1
reconstructed args: -classpath /Users/sergey/work/projects/scala/compiler.bug/target/scala-2.10/classes -bootclasspath /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/JObjC.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/classes:/Users/sergey/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.10.4-RC1.jar
last tree to typer: term idMonad
symbol: value idMonad in object Monads (flags: <triedcooking> private[this])
symbol definition: private[this] val idMonad: Monads.Monad
tpe: <notype>
symbol owners: value idMonad -> object Monads -> package <empty>
context owners: value x$1 -> method apply -> anonymous class $anonfun$1 -> value qual$1 -> method flatMap -> trait Monad -> object Monads -> package <empty>
== Enclosing template or block ==
DefDef( // final def apply(x$1: runtime.BoxedUnit): Object
<method> final <triedcooking>
"apply"
[]
// 1 parameter list
ValDef( // x$1: runtime.BoxedUnit
<param>
"x$1"
<tpt> // tree.tpe=runtime.BoxedUnit
<empty>
)
<tpt> // tree.tpe=Object
"ma" // ma: Object, tree.tpe=Object
)
== Expanded type of tree ==
<notype>
unhandled exception while transforming Monads.scala
[error] uncaught exception during compilation: java.lang.IllegalArgumentException
java.lang.IllegalArgumentException: Could not find proxy for ma: Object in List(value ma, method flatMap, class Monad$class, object Monads, package <empty>, package <root>) (currentOwner= method apply )
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:303)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$searchIn$1(LambdaLift.scala:308)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.proxy(LambdaLift.scala:317)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$proxyRef(LambdaLift.scala:350)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.postTransform(LambdaLift.scala:517)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1235)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1233)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1232)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2927)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2925)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2925)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:566)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1276)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2904)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1280)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1279)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1278)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2927)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2925)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2925)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:566)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1238)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2900)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2900)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2900)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1219)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1217)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1219)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1235)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1233)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1232)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2927)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2925)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2925)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:566)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1276)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2904)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1280)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1279)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1278)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2927)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2925)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2925)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:566)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:42)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1276)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:44)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2904)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1280)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1279)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1278)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2927)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2925)
at scala.collection.immutable.List.loop$1(List.scala:170)
at scala.collection.immutable.List.mapConserve(List.scala:186)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2925)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:566)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformStats(LambdaLift.scala:42)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1298)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1298)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1297)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:13)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2897)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2936)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:46)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:324)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.preTransform(LambdaLift.scala:539)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:547)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transform(LambdaLift.scala:42)
at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:227)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.scala$tools$nsc$transform$LambdaLift$LambdaLifter$$super$transformUnit(LambdaLift.scala:572)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter$$anonfun$transformUnit$1.apply(LambdaLift.scala:572)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter$$anonfun$transformUnit$1.apply(LambdaLift.scala:572)
at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:207)
at scala.reflect.internal.SymbolTable.afterPhase(SymbolTable.scala:216)
at scala.tools.nsc.transform.LambdaLift$LambdaLifter.transformUnit(LambdaLift.scala:571)
at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:464)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:431)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:431)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:431)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1583)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1557)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1553)
at scala.tools.nsc.Global$Run.compile(Global.scala:1662)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:123)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:99)
at xsbt.CompilerInterface.run(CompilerInterface.scala:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:102)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:48)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply$mcV$sp(AggressiveCompile.scala:98)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:98)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:98)
at sbt.compiler.AggressiveCompile.sbt$compiler$AggressiveCompile$$timed(AggressiveCompile.scala:159)
at sbt.compiler.AggressiveCompile$$anonfun$3.compileScala$1(AggressiveCompile.scala:97)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:142)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:86)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:38)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:36)
at sbt.inc.Incremental$.cycle(Incremental.scala:73)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:33)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:32)
at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:41)
at sbt.inc.Incremental$.compile(Incremental.scala:32)
at sbt.inc.IncrementalCompile$.apply(Compile.scala:26)
at sbt.compiler.AggressiveCompile.compile2(AggressiveCompile.scala:150)
at sbt.compiler.AggressiveCompile.compile1(AggressiveCompile.scala:70)
at sbt.compiler.AggressiveCompile.apply(AggressiveCompile.scala:45)
at sbt.Compiler$.apply(Compiler.scala:70)
at sbt.Defaults$.sbt$Defaults$$compileTaskImpl(Defaults.scala:736)
at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:730)
at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:730)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)
at sbt.std.Transform$$anon$4.work(System.scala:64)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
at sbt.Execute.work(Execute.scala:244)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
[error] (compile:compile) java.lang.IllegalArgumentException: Could not find proxy for ma: Object in List(value ma, method flatMap, class Monad$class, object Monads, package <empty>, package <root>) (currentOwner= method apply )
[error] Total time: 11 s, completed 01.01.2014 17:02:38
compiler.bug $
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