2.8.1.RC3 possible issue, 'implicitNotFound not found'

This is something that showed up when compiling 2.8.0 projects with an
ENSIME built against 2.8.1.RC3. In short, it seems the 2.8.1 compiler is
trying to find a 2.8.1-only annotation class on the compilation
classpath which won't be found when compiling a 2.8.0 project.

Compile the following driver with 2.8.1.RC3
-----------------------------------------------

import scala.tools.nsc.Settings
import scala.tools.nsc.reporters.ConsoleReporter
import scala.tools.nsc.interactive.Global

object Main{

def main(args:Array[String]){
val settings = new Settings(Console.println)
settings.processArguments(
List("-verbose",
"-classpath",".:/home/aemon/lib/scala-2.8.0/lib/scala-library.jar",
"-sourcepath","."), false)
settings.usejavacp.value = false

println("\nPresentation Compiler settings:")
System.out.println(settings.toString)
println("")

val reporter = new ConsoleReporter(settings)
val c = new Global(settings, reporter)
val x = new c.Response[Unit]()
c.askReload(List(c.getSourceFile("ImplicitTest.scala")),x)
x.get
}
}

-------------------------------

ImplicitTest.scala, which will be loaded at runtime, is pasted below
-----------------------------------
import java.util._
import scala.collection.generic._

object ImplicitTest{

def main{
doImplicitely
}

def doImplicitely (implicit thing :
CanBuildFrom[String,Int,List[Int]]) = println(greeting)

}
---------------------------------------------

Now run the driver. For some reason running with the 'scala' command
causes the -usejavacp=false directive to be ignored, so I run as follows
to make sure the embedded compiler has a clean classpath, i.e. doesn't
include the 2.8.1 jars.

java -classpath
.:/home/aemon/lib/scala-2.8.1.RC3/lib/scala-library.jar:/home/aemon/lib/scala-2.8.1.RC3/lib/scala-compiler.jar
Main

Here's the output:
----------------------------------

[Classpath =
/usr/lib/jvm/java-6-openjdk/jre/lib/resources.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jsse.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jce.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/charsets.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rhino.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/dnsns.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/pulse-java.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/localedata.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/ext/gnome-java-bridge.jar:.:/home/aemon/lib/scala/lib/scala-library.jar]
[loaded package loader resources.jar in 856ms]
[loaded package loader java in 2ms]
[loaded package loader lang in 36ms]
[loaded package loader reflect in 26ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/package.class) in 203ms]
[loaded package loader scala in 408ms]
[loaded package loader runtime in 26ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/lang/Object.class) in 12ms]
[loaded package loader io in 7ms]
[loaded package loader util in 17ms]
[loaded package loader nio in 4ms]
[loaded package loader charset in 1ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/lang/String.class) in 107ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/package.class)
in 16ms]
[loaded package loader collection in 63ms]
[dropping dependency on node with no phase object: msil]
[promote the dependency of explicitouter: tailcalls => specialize]
[parsing ImplicitTest.scala]
[loaded package loader annotation in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Predef.class) in 31ms]
[parsing ImplicitTest.scala]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/ScalaObject.class) in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/package.class)
in 16ms]
[loaded package loader generic in 21ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/ClassfileAnnotation.class)
in 9ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Annotation.class) in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/StaticAnnotation.class) in
1ms]
[loaded package loader immutable in 20ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/immutable/List.class)
in 16ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/SeqFactory.class)
in 5ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/TraversableFactory.class)
in 8ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/GenericCompanion.class)
in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Array.class) in 15ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/LowPriorityImplicits.class)
in 3ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/CanBuildFrom.class)
in 1ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/util/List.class) in 20ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Function1.class) in 7ms]
[loaded package loader mutable in 29ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/mutable/ArrayOps.class)
in 62ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/immutable/IndexedSeq.class)
in 12ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/immutable/Seq.class)
in 7ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/IndexedSeq.class)
in 5ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/GenericTraversableTemplate.class)
in 2ms]
[loaded package loader unchecked in 0ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/IndexedSeqLike.class)
in 6ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/immutable/Iterable.class)
in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/Seq.class)
in 3ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/SeqLike.class)
in 6ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/immutable/Traversable.class)
in 9ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/Iterable.class)
in 5ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/IterableLike.class)
in 4ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/Traversable.class)
in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/TraversableLike.class)
in 8ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/HasNewBuilder.class)
in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/generic/FilterMonadic.class)
in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/TraversableOnce.class)
in 6ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/annotation/unchecked/uncheckedVariance.class)
in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/TypeConstraint.class)
in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Immutable.class) in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/Equals.class) in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/PartialFunction.class)
in 2ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/util/Collection.class)
in 6ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/lang/Iterable.class) in 2ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/collection/mutable/WrappedArray.class)
in 9ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/lang/Comparable.class)
in 1ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/io/Serializable.class)
in 1ms]
[loaded class file
/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar(java/lang/CharSequence.class)
in 1ms]
[loaded class file
/home/aemon/lib/scala/lib/scala-library.jar(scala/runtime/AnyValCompanion.class)
in 40ms]
scala.tools.nsc.MissingRequirementError: class
scala.annotation.implicitNotFound not found.
at
scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:517)
at
scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.scala:475)
at
scala.tools.nsc.symtab.Definitions$definitions$.ImplicitNotFoundClass(Definitions.scala:123)
at
scala.tools.nsc.symtab.Symbols$Symbol.implicitNotFoundMsg(Symbols.scala:465)
at
scala.tools.nsc.typechecker.Typers$Typer.errorMessage$1(Typers.scala:188)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$applyImplicitArgs$1.apply(Typers.scala:214)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$applyImplicitArgs$1.apply(Typers.scala:201)
at
scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61)
at scala.collection.immutable.List.foreach(List.scala:45)
at
scala.tools.nsc.typechecker.Typers$Typer.applyImplicitArgs(Typers.scala:201)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$adapt$1.apply(Typers.scala:844)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$adapt$1.apply(Typers.scala:844)
at scala.tools.nsc.typechecker.Typers$Typer.silent(Typers.scala:722)
at scala.tools.nsc.typechecker.Typers$Typer.adapt(Typers.scala:844)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4208)
at scala.tools.nsc.typechecker.Typers$Typer.typedBlock(Typers.scala:1949)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3894)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4203)
at
scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:4348)
at scala.tools.nsc.typechecker.Typers$Typer.typedDefDef(Typers.scala:1789)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3862)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4203)
at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2128)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$20.apply(Typers.scala:2196)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$20.apply(Typers.scala:2196)
at scala.collection.immutable.List.loop$1(List.scala:115)
at scala.collection.immutable.List.mapConserve(List.scala:132)
at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2196)
at
scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1549)
at
scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1348)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3856)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4203)
at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2128)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$20.apply(Typers.scala:2196)
at
scala.tools.nsc.typechecker.Typers$Typer$$anonfun$20.apply(Typers.scala:2196)
at scala.collection.immutable.List.loop$1(List.scala:115)
at scala.collection.immutable.List.mapConserve(List.scala:132)
at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2196)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3849)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4203)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4252)
at
scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:85)
at
scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:282)
at
scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:282)
at scala.tools.nsc.reporters.Reporter.withSource(Reporter.scala:48)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:282)
at
scala.tools.nsc.interactive.Global$TyperRun$$anonfun$applyPhase$1$$anonfun$apply$mcV$sp$1.apply(Global.scala:614)
at
scala.tools.nsc.interactive.Global$TyperRun$$anonfun$applyPhase$1$$anonfun$apply$mcV$sp$1.apply(Global.scala:614)
at scala.tools.nsc.symtab.SymbolTable.atPhase(SymbolTable.scala:103)
at
scala.tools.nsc.interactive.Global$TyperRun$$anonfun$applyPhase$1.apply(Global.scala:614)
at
scala.tools.nsc.interactive.Global$TyperRun$$anonfun$applyPhase$1.apply(Global.scala:614)
at scala.tools.nsc.reporters.Reporter.withSource(Reporter.scala:48)
at scala.tools.nsc.interactive.Global$TyperRun.applyPhase(Global.scala:613)
at scala.tools.nsc.interactive.Global$TyperRun.typeCheck(Global.scala:567)
at
scala.tools.nsc.interactive.Global$$anonfun$recompile$2.apply(Global.scala:299)
at
scala.tools.nsc.interactive.Global$$anonfun$recompile$2.apply(Global.scala:296)
at
scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:61)
at scala.collection.immutable.List.foreach(List.scala:45)
at scala.tools.nsc.interactive.Global.recompile(Global.scala:296)
at
scala.tools.nsc.interactive.Global.scala$tools$nsc$interactive$Global$$backgroundCompile(Global.scala:262)
at scala.tools.nsc.interactive.Global$$anon$3.run(Global.scala:225)
Fatal Error: scala.tools.nsc.MissingRequirementError: class
scala.annotation.implicitNotFound not found.

-----------------------------------------------------------------------------------------

I don't understand why the annotation is not loaded from the hosting
JVM's classpath.

Thanks!
Aemon