Revert "remove unneeded unlinking in compiler interface"

Unlinking is actually needed.

This reverts commit 1581d1b7e1.

compile/interface/Analyzer.scala

@@ -44,6 +44,7 @@ final class Analyzer(val global: CallbackGlobal) extends Compat
 						classFile(on) match
 						{
 							case Some((f,className,inOutDir)) =>
+								if(inOutDir && on.isJavaDefined) registerTopLevelSym(on)
 								f match
 								{
 									case ze: ZipArchive#Entry => for(zip <- ze.underlyingSource; zipFile <- Option(zip.file) ) binaryDependency(zipFile, className)

compile/interface/CompilerInterface.scala

@@ -172,6 +172,7 @@ private final class CachedCompiler0(args: Array[String], initialLog: WeakLog) ex
 		def clear()
 		{
 			callback0 = null
+			atPhase(currentRun.namerPhase) { forgetAll() }
 			superDropRun()
 			reporter = null
 		}
@@ -188,6 +189,21 @@ private final class CachedCompiler0(args: Array[String], initialLog: WeakLog) ex
 		def findOnClassPath(name: String): Option[AbstractFile] =
 			classPath.findClass(name).flatMap(_.binary.asInstanceOf[Option[AbstractFile]])
 
+		override def registerTopLevelSym(sym: Symbol) = toForget += sym
+
+		final def unlinkAll(m: Symbol) {
+			val scope = m.owner.info.decls
+			scope unlink m
+			scope unlink m.companionSymbol
+		}
+
+		def forgetAll()
+		{
+			for(sym <- toForget)
+				unlinkAll(sym)
+			toForget = mutable.Set()
+		}
+
 		// fine-control over external changes is unimplemented:
 		//   must drop whole CachedCompiler when !changes.isEmpty
 		def reload(changes: DependencyChanges)