Absolutized paths involving the scala package.

Confusing, now-it-happens now-it-doesn't mysteries lurk
in the darkness. When scala packages are declared like this:

  package scala.collection.mutable

Then paths relative to scala can easily be broken via the unlucky
presence of an empty (or nonempty) directory. Example:

  // a.scala
  package scala.foo
  class Bar { new util.Random }

  % scalac ./a.scala
  % mkdir util
  % scalac ./a.scala
  ./a.scala:4: error: type Random is not a member of package util
    new util.Random
             ^
  one error found

There are two ways to play defense against this:

 - don't use relative paths; okay sometimes, less so others
 - don't "opt out" of the scala package

This commit mostly pursues the latter, with occasional doses
of the former.

I created a scratch directory containing these empty directories:

  actors annotation ant api asm beans cmd collection compat
  concurrent control convert docutil dtd duration event factory
  forkjoin generic hashing immutable impl include internal io
  logging macros man1 matching math meta model mutable nsc parallel
  parsing partest persistent process pull ref reflect reify remote
  runtime scalap scheduler script swing sys text threadpool tools
  transform unchecked util xml

I stopped when I could compile the main src directories
even with all those empties on my classpath.

36 files changed, 104 insertions, 68 deletions

diff --git a/src/compiler/scala/tools/nsc/CompileClient.scala b/src/compiler/scala/tools/nsc/CompileClient.scala
index 64f6758e73..3017d8c9cc 100644
--- a/src/compiler/scala/tools/nsc/CompileClient.scala
+++ b/src/compiler/scala/tools/nsc/CompileClient.scala
@@ -3,11 +3,12 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 
 import settings.FscSettings
 import scala.tools.util.CompileOutputCommon
-import sys.SystemProperties.preferIPv4Stack
+import scala.sys.SystemProperties.preferIPv4Stack
 
 /** The client part of the fsc offline compiler.  Instead of compiling
  *  things itself, it send requests to a CompileServer.
diff --git a/src/compiler/scala/tools/nsc/Driver.scala b/src/compiler/scala/tools/nsc/Driver.scala
index fbfed6110f..3ac27a42e8 100644
--- a/src/compiler/scala/tools/nsc/Driver.scala
+++ b/src/compiler/scala/tools/nsc/Driver.scala
@@ -1,4 +1,5 @@
-package scala.tools.nsc
+package scala
+package tools.nsc
 
 import scala.tools.nsc.reporters.ConsoleReporter
 import Properties.{ versionString, copyrightString, residentPromptString }
diff --git a/src/compiler/scala/tools/nsc/Global.scala b/src/compiler/scala/tools/nsc/Global.scala
index e294d5a6c9..f1fccd6069 100644
--- a/src/compiler/scala/tools/nsc/Global.scala
+++ b/src/compiler/scala/tools/nsc/Global.scala
@@ -3,7 +3,9 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools
+package nsc
 
 import java.io.{ File, FileOutputStream, PrintWriter, IOException, FileNotFoundException }
 import java.nio.charset.{ Charset, CharsetDecoder, IllegalCharsetNameException, UnsupportedCharsetException }
diff --git a/src/compiler/scala/tools/nsc/MainTokenMetric.scala b/src/compiler/scala/tools/nsc/MainTokenMetric.scala
index e2893204e0..84eb688b63 100644
--- a/src/compiler/scala/tools/nsc/MainTokenMetric.scala
+++ b/src/compiler/scala/tools/nsc/MainTokenMetric.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 
 import scala.tools.nsc.reporters.ConsoleReporter
 
diff --git a/src/compiler/scala/tools/nsc/ScriptRunner.scala b/src/compiler/scala/tools/nsc/ScriptRunner.scala
index 5f8bc71449..d553d71bf5 100644
--- a/src/compiler/scala/tools/nsc/ScriptRunner.scala
+++ b/src/compiler/scala/tools/nsc/ScriptRunner.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 
 import io.{ Directory, File, Path }
 import java.io.IOException
diff --git a/src/compiler/scala/tools/nsc/ast/Printers.scala b/src/compiler/scala/tools/nsc/ast/Printers.scala
index 72538bac08..89652c5a20 100644
--- a/src/compiler/scala/tools/nsc/ast/Printers.scala
+++ b/src/compiler/scala/tools/nsc/ast/Printers.scala
@@ -42,7 +42,7 @@ trait Printers extends scala.reflect.internal.Printers { this: Global =>
     }
   }
 
-  // overflow cases missing from TreePrinter in reflect.api
+  // overflow cases missing from TreePrinter in scala.reflect.api
   override def xprintTree(treePrinter: super.TreePrinter, tree: Tree) = tree match {
     case DocDef(comment, definition) =>
       treePrinter.print(comment.raw)
diff --git a/src/compiler/scala/tools/nsc/ast/TreeBrowsers.scala b/src/compiler/scala/tools/nsc/ast/TreeBrowsers.scala
index 0077ed0c84..1e70b7091b 100644
--- a/src/compiler/scala/tools/nsc/ast/TreeBrowsers.scala
+++ b/src/compiler/scala/tools/nsc/ast/TreeBrowsers.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package ast
 
 import java.awt.{List => awtList, _}
diff --git a/src/compiler/scala/tools/nsc/ast/parser/Scanners.scala b/src/compiler/scala/tools/nsc/ast/parser/Scanners.scala
index d22311afe9..c1a8b96cdf 100644
--- a/src/compiler/scala/tools/nsc/ast/parser/Scanners.scala
+++ b/src/compiler/scala/tools/nsc/ast/parser/Scanners.scala
@@ -696,7 +696,7 @@ trait Scanners extends ScannersCommon {
       }
     }
 
-    @annotation.tailrec private def getStringPart(multiLine: Boolean): Unit = {
+    @scala.annotation.tailrec private def getStringPart(multiLine: Boolean): Unit = {
       def finishStringPart() = {
         setStrVal()
         token = STRINGPART
diff --git a/src/compiler/scala/tools/nsc/backend/ScalaPrimitives.scala b/src/compiler/scala/tools/nsc/backend/ScalaPrimitives.scala
index 1f9862596c..2007d799df 100644
--- a/src/compiler/scala/tools/nsc/backend/ScalaPrimitives.scala
+++ b/src/compiler/scala/tools/nsc/backend/ScalaPrimitives.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend
 
 import scala.collection.{ mutable, immutable }
diff --git a/src/compiler/scala/tools/nsc/backend/icode/GenICode.scala b/src/compiler/scala/tools/nsc/backend/icode/GenICode.scala
index 31028e64d3..9c9c001f02 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/GenICode.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/GenICode.scala
@@ -4,7 +4,8 @@
  */
 
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend
 package icode
 
diff --git a/src/compiler/scala/tools/nsc/backend/icode/Linearizers.scala b/src/compiler/scala/tools/nsc/backend/icode/Linearizers.scala
index c5fe3228a3..54be9d18f1 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/Linearizers.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/Linearizers.scala
@@ -4,7 +4,8 @@
  */
 
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend
 package icode
 
diff --git a/src/compiler/scala/tools/nsc/backend/icode/Members.scala b/src/compiler/scala/tools/nsc/backend/icode/Members.scala
index c1cda2c863..4389afb2b7 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/Members.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/Members.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend
 package icode
 
@@ -73,7 +74,7 @@ trait Members {
         )
         startBlock = b.successors.head
       }
-      
+
       blocks -= b
       assert(!blocks.contains(b))
       method.exh filter (_ covers b) foreach (_.covered -= b)
diff --git a/src/compiler/scala/tools/nsc/backend/icode/Opcodes.scala b/src/compiler/scala/tools/nsc/backend/icode/Opcodes.scala
index ff118be3c4..925775adb9 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/Opcodes.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/Opcodes.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend
 package icode
 
@@ -394,14 +395,14 @@ trait Opcodes { self: ICodes =>
 
       override def category = mthdsCat
     }
-    
+
     /**
      * A place holder entry that allows us to parse class files with invoke dynamic
      * instructions. Because the compiler doesn't yet really understand the
      * behavior of invokeDynamic, this op acts as a poison pill. Any attempt to analyze
      * this instruction will cause a failure. The only optimization that
      * should ever look at non-Scala generated icode is the inliner, and it
-     * has been modified to not examine any method with invokeDynamic 
+     * has been modified to not examine any method with invokeDynamic
      * instructions. So if this poison pill ever causes problems then
      * there's been a serious misunderstanding
      */
diff --git a/src/compiler/scala/tools/nsc/backend/icode/analysis/CopyPropagation.scala b/src/compiler/scala/tools/nsc/backend/icode/analysis/CopyPropagation.scala
index 338a07c872..07a4e22c1f 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/analysis/CopyPropagation.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/analysis/CopyPropagation.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend.icode.analysis
 
 import scala.collection.{ mutable, immutable }
diff --git a/src/compiler/scala/tools/nsc/backend/icode/analysis/DataFlowAnalysis.scala b/src/compiler/scala/tools/nsc/backend/icode/analysis/DataFlowAnalysis.scala
index ebc2d33a62..a378998f8f 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/analysis/DataFlowAnalysis.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/analysis/DataFlowAnalysis.scala
@@ -4,7 +4,8 @@
  */
 
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend.icode.analysis
 
 import scala.collection.{ mutable, immutable }
diff --git a/src/compiler/scala/tools/nsc/backend/icode/analysis/TypeFlowAnalysis.scala b/src/compiler/scala/tools/nsc/backend/icode/analysis/TypeFlowAnalysis.scala
index 57380db7e7..7a53293384 100644
--- a/src/compiler/scala/tools/nsc/backend/icode/analysis/TypeFlowAnalysis.scala
+++ b/src/compiler/scala/tools/nsc/backend/icode/analysis/TypeFlowAnalysis.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend.icode.analysis
 
 import scala.collection.{mutable, immutable}
diff --git a/src/compiler/scala/tools/nsc/backend/jvm/GenASM.scala b/src/compiler/scala/tools/nsc/backend/jvm/GenASM.scala
index 74d6d061e3..e50b73dcc3 100644
--- a/src/compiler/scala/tools/nsc/backend/jvm/GenASM.scala
+++ b/src/compiler/scala/tools/nsc/backend/jvm/GenASM.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend.jvm
 
 import scala.collection.{ mutable, immutable }
diff --git a/src/compiler/scala/tools/nsc/backend/opt/ConstantOptimization.scala b/src/compiler/scala/tools/nsc/backend/opt/ConstantOptimization.scala
index 8a85873e94..43c8527f41 100644
--- a/src/compiler/scala/tools/nsc/backend/opt/ConstantOptimization.scala
+++ b/src/compiler/scala/tools/nsc/backend/opt/ConstantOptimization.scala
@@ -3,7 +3,8 @@
  * @author  James Iry
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package backend.opt
 
 import scala.tools.nsc.backend.icode.analysis.LubException
diff --git a/src/compiler/scala/tools/nsc/reporters/ConsoleReporter.scala b/src/compiler/scala/tools/nsc/reporters/ConsoleReporter.scala
index bda195f9d3..fdb5c72c3d 100644
--- a/src/compiler/scala/tools/nsc/reporters/ConsoleReporter.scala
+++ b/src/compiler/scala/tools/nsc/reporters/ConsoleReporter.scala
@@ -3,7 +3,8 @@
  * @author Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package reporters
 
 import java.io.{ BufferedReader, IOException, PrintWriter }
diff --git a/src/compiler/scala/tools/nsc/settings/AbsScalaSettings.scala b/src/compiler/scala/tools/nsc/settings/AbsScalaSettings.scala
index 783e249931..c9718f711a 100644
--- a/src/compiler/scala/tools/nsc/settings/AbsScalaSettings.scala
+++ b/src/compiler/scala/tools/nsc/settings/AbsScalaSettings.scala
@@ -3,7 +3,8 @@
  * @author  Paul Phillips
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package settings
 
 trait AbsScalaSettings {
diff --git a/src/compiler/scala/tools/nsc/settings/ScalaSettings.scala b/src/compiler/scala/tools/nsc/settings/ScalaSettings.scala
index 57af1b9c9a..788aa215be 100644
--- a/src/compiler/scala/tools/nsc/settings/ScalaSettings.scala
+++ b/src/compiler/scala/tools/nsc/settings/ScalaSettings.scala
@@ -4,7 +4,8 @@
  */
 // $Id$
 
-package scala.tools
+package scala
+package tools
 package nsc
 package settings
 
diff --git a/src/compiler/scala/tools/nsc/settings/ScalaVersion.scala b/src/compiler/scala/tools/nsc/settings/ScalaVersion.scala
index d6a0149411..da1cc0c4cf 100644
--- a/src/compiler/scala/tools/nsc/settings/ScalaVersion.scala
+++ b/src/compiler/scala/tools/nsc/settings/ScalaVersion.scala
@@ -4,7 +4,8 @@
  */
 // $Id$
 
-package scala.tools.nsc.settings
+package scala
+package tools.nsc.settings
 
 /**
  * Represents a single Scala version in a manner that
@@ -19,7 +20,7 @@ abstract class ScalaVersion extends Ordered[ScalaVersion] {
  */
 case object NoScalaVersion extends ScalaVersion {
   def unparse = "none"
-      
+
   def compare(that: ScalaVersion): Int = that match {
     case NoScalaVersion => 0
     case _ => 1
@@ -33,7 +34,7 @@ case object NoScalaVersion extends ScalaVersion {
  * to segregate builds
  */
 case class SpecificScalaVersion(major: Int, minor: Int, rev: Int, build: ScalaBuild) extends ScalaVersion {
-  def unparse = s"${major}.${minor}.${rev}.${build.unparse}"  
+  def unparse = s"${major}.${minor}.${rev}.${build.unparse}"
 
   def compare(that: ScalaVersion): Int =  that match {
     case SpecificScalaVersion(thatMajor, thatMinor, thatRev, thatBuild) =>
@@ -48,7 +49,7 @@ case class SpecificScalaVersion(major: Int, minor: Int, rev: Int, build: ScalaBu
       else build compare thatBuild
     case AnyScalaVersion => 1
     case NoScalaVersion => -1
-  }  
+  }
 }
 
 /**
@@ -56,7 +57,7 @@ case class SpecificScalaVersion(major: Int, minor: Int, rev: Int, build: ScalaBu
  */
 case object AnyScalaVersion extends ScalaVersion {
   def unparse = "any"
-      
+
   def compare(that: ScalaVersion): Int = that match {
     case AnyScalaVersion => 0
     case _ => -1
@@ -70,7 +71,7 @@ object ScalaVersion {
   private val dot = "\\."
   private val dash = "\\-"
   private def not(s:String) = s"[^${s}]"
-  private val R = s"((${not(dot)}*)(${dot}(${not(dot)}*)(${dot}(${not(dash)}*)(${dash}(.*))?)?)?)".r  
+  private val R = s"((${not(dot)}*)(${dot}(${not(dot)}*)(${dot}(${not(dash)}*)(${dash}(.*))?)?)?)".r
 
   def apply(versionString : String, errorHandler: String => Unit): ScalaVersion = {
     def errorAndValue() = {
@@ -82,41 +83,41 @@ object ScalaVersion {
         )
         AnyScalaVersion
     }
-    
+
     def toInt(s: String) = s match {
       case null | "" => 0
       case _ => s.toInt
     }
-    
+
     def isInt(s: String) = util.Try(toInt(s)).isSuccess
-    
+
     def toBuild(s: String) = s match {
       case null | "FINAL" => Final
       case s if (s.toUpperCase.startsWith("RC") && isInt(s.substring(2))) => RC(toInt(s.substring(2)))
       case s if (s.toUpperCase.startsWith("M") && isInt(s.substring(1))) => Milestone(toInt(s.substring(1)))
       case _ => Development(s)
     }
-    
+
     try versionString match {
       case "none" => NoScalaVersion
       case "any" => AnyScalaVersion
-      case R(_, majorS, _, minorS, _, revS, _, buildS) => 
+      case R(_, majorS, _, minorS, _, revS, _, buildS) =>
         SpecificScalaVersion(toInt(majorS), toInt(minorS), toInt(revS), toBuild(buildS))
-      case _ => 
+      case _ =>
         errorAndValue()
     } catch {
       case e: NumberFormatException => errorAndValue()
     }
   }
-  
-  def apply(versionString: String): ScalaVersion = 
+
+  def apply(versionString: String): ScalaVersion =
       apply(versionString, msg => throw new NumberFormatException(msg))
-  
+
   /**
    * The version of the compiler running now
    */
   val current = apply(util.Properties.versionNumberString)
-  
+
   /**
    * The 2.8.0 version.
    */
@@ -126,7 +127,7 @@ object ScalaVersion {
 /**
  * Represents the data after the dash in major.minor.rev-build
  */
-abstract class ScalaBuild extends Ordered[ScalaBuild] {  
+abstract class ScalaBuild extends Ordered[ScalaBuild] {
   /**
    * Return a version of this build information that can be parsed back into the
    * same ScalaBuild
@@ -138,7 +139,7 @@ abstract class ScalaBuild extends Ordered[ScalaBuild] {
  */
 case class Development(id: String) extends ScalaBuild {
   def unparse = s"-${id}"
-      
+
   def compare(that: ScalaBuild) = that match {
     // sorting two development builds based on id is reasonably valid for two versions created with the same schema
     // otherwise it's not correct, but since it's impossible to put a total ordering on development build versions
@@ -154,7 +155,7 @@ case class Development(id: String) extends ScalaBuild {
  */
 case object Final extends ScalaBuild {
   def unparse = ""
-      
+
   def compare(that: ScalaBuild) = that match {
     case Final => 0
     // a final is newer than anything other than a development build or another final
@@ -168,14 +169,14 @@ case object Final extends ScalaBuild {
  */
 case class RC(n: Int) extends ScalaBuild {
   def unparse = s"-RC${n}"
-      
+
   def compare(that: ScalaBuild) = that match {
     // compare two rcs based on their RC numbers
     case RC(thatN) => n - thatN
     // an rc is older than anything other than a milestone or another rc
     case Milestone(_) => 1
-    case _ => -1    
-  }  
+    case _ => -1
+  }
 }
 
 /**
@@ -183,12 +184,12 @@ case class RC(n: Int) extends ScalaBuild {
  */
 case class Milestone(n: Int) extends ScalaBuild {
   def unparse = s"-M${n}"
-      
+
   def compare(that: ScalaBuild) = that match {
     // compare two milestones based on their milestone numbers
     case Milestone(thatN) => n - thatN
     // a milestone is older than anything other than another milestone
     case _ => -1
-    
-  }  
+
+  }
 }
diff --git a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
index ce889f3ce3..42bf0f6b41 100644
--- a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
+++ b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package symtab
 package classfile
 
diff --git a/src/compiler/scala/tools/nsc/symtab/classfile/ICodeReader.scala b/src/compiler/scala/tools/nsc/symtab/classfile/ICodeReader.scala
index 7aaeb56deb..52ebb3b0a2 100644
--- a/src/compiler/scala/tools/nsc/symtab/classfile/ICodeReader.scala
+++ b/src/compiler/scala/tools/nsc/symtab/classfile/ICodeReader.scala
@@ -3,7 +3,8 @@
  * @author Iulian Dragos
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package symtab
 package classfile
 
diff --git a/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala b/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
index 95a1f50465..48263a496e 100644
--- a/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
+++ b/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
@@ -3,7 +3,8 @@
  * @author Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package transform
 
 import symtab._
diff --git a/src/compiler/scala/tools/nsc/transform/SpecializeTypes.scala b/src/compiler/scala/tools/nsc/transform/SpecializeTypes.scala
index 4b00c0efe9..90ca157090 100644
--- a/src/compiler/scala/tools/nsc/transform/SpecializeTypes.scala
+++ b/src/compiler/scala/tools/nsc/transform/SpecializeTypes.scala
@@ -3,7 +3,8 @@
  * @author Iulian Dragos
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package transform
 
 import scala.tools.nsc.symtab.Flags
diff --git a/src/compiler/scala/tools/nsc/transform/TailCalls.scala b/src/compiler/scala/tools/nsc/transform/TailCalls.scala
index 9b72756392..9e867917f9 100644
--- a/src/compiler/scala/tools/nsc/transform/TailCalls.scala
+++ b/src/compiler/scala/tools/nsc/transform/TailCalls.scala
@@ -3,7 +3,8 @@
  * @author Iulian Dragos
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package transform
 
 import symtab.Flags
diff --git a/src/compiler/scala/tools/nsc/transform/UnCurry.scala b/src/compiler/scala/tools/nsc/transform/UnCurry.scala
index 998b7f3de8..d7be0ed180 100644
--- a/src/compiler/scala/tools/nsc/transform/UnCurry.scala
+++ b/src/compiler/scala/tools/nsc/transform/UnCurry.scala
@@ -3,7 +3,8 @@
  * @author
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package transform
 
 import symtab.Flags._
diff --git a/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala b/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala
index 7508843a48..069484ff65 100644
--- a/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala
+++ b/src/compiler/scala/tools/nsc/transform/patmat/Logic.scala
@@ -4,7 +4,8 @@
  * @author Adriaan Moors
  */
 
-package scala.tools.nsc.transform.patmat
+package scala
+package tools.nsc.transform.patmat
 
 import scala.language.postfixOps
 import scala.collection.mutable
diff --git a/src/compiler/scala/tools/nsc/typechecker/ConstantFolder.scala b/src/compiler/scala/tools/nsc/typechecker/ConstantFolder.scala
index 65bfd8e34e..56ed0ee16c 100644
--- a/src/compiler/scala/tools/nsc/typechecker/ConstantFolder.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/ConstantFolder.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package typechecker
 
 import java.lang.ArithmeticException
diff --git a/src/compiler/scala/tools/nsc/typechecker/Implicits.scala b/src/compiler/scala/tools/nsc/typechecker/Implicits.scala
index 875aa5a9d3..2ad4ec43f7 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Implicits.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Implicits.scala
@@ -8,7 +8,8 @@
 //todo: disallow C#D in superclass
 //todo: treat :::= correctly
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package typechecker
 
 import scala.annotation.tailrec
@@ -167,7 +168,7 @@ trait Implicits {
     override def isFailure   = true
     override def isDivergent = true
   }
-  
+
   lazy val AmbiguousSearchFailure = new SearchResult(EmptyTree, EmptyTreeTypeSubstituter) {
     override def isFailure          = true
     override def isAmbiguousFailure = true
@@ -799,16 +800,16 @@ trait Implicits {
         // Initially null, will be saved on first diverging expansion.
         private var implicitSym: Symbol    = _
         private var countdown: Int = 1
-        
+
         def sym: Symbol = implicitSym
-        def apply(search: SearchResult, i: ImplicitInfo): SearchResult = 
+        def apply(search: SearchResult, i: ImplicitInfo): SearchResult =
           if (search.isDivergent && countdown > 0) {
             countdown -= 1
             implicitSym = i.sym
             log("discarding divergent implicit ${implicitSym} during implicit search")
             SearchFailure
           } else search
-      } 
+      }
 
       /** Sorted list of eligible implicits.
        */
diff --git a/src/compiler/scala/tools/nsc/typechecker/SuperAccessors.scala b/src/compiler/scala/tools/nsc/typechecker/SuperAccessors.scala
index 75aa4c46e2..3f7e6d7665 100644
--- a/src/compiler/scala/tools/nsc/typechecker/SuperAccessors.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/SuperAccessors.scala
@@ -4,7 +4,8 @@
  * @author Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package typechecker
 
 import scala.collection.{ mutable, immutable }
diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala
index f501ff468d..001808e6bc 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala
@@ -9,7 +9,8 @@
 // Added: Thu Apr 12 18:23:58 2007
 //todo: disallow C#D in superclass
 //todo: treat :::= correctly
-package scala.tools.nsc
+package scala
+package tools.nsc
 package typechecker
 
 import scala.collection.mutable
diff --git a/src/compiler/scala/tools/nsc/util/JavaCharArrayReader.scala b/src/compiler/scala/tools/nsc/util/JavaCharArrayReader.scala
index 26d19906c2..58a5442465 100644
--- a/src/compiler/scala/tools/nsc/util/JavaCharArrayReader.scala
+++ b/src/compiler/scala/tools/nsc/util/JavaCharArrayReader.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools.nsc
+package scala
+package tools.nsc
 package util
 
 import scala.reflect.internal.Chars._
diff --git a/src/compiler/scala/tools/nsc/util/ShowPickled.scala b/src/compiler/scala/tools/nsc/util/ShowPickled.scala
index 76b1394b85..f9d706ae55 100644
--- a/src/compiler/scala/tools/nsc/util/ShowPickled.scala
+++ b/src/compiler/scala/tools/nsc/util/ShowPickled.scala
@@ -3,7 +3,8 @@
  * @author  Martin Odersky
  */
 
-package scala.tools
+package scala
+package tools
 package nsc
 package util
 
diff --git a/src/compiler/scala/tools/nsc/util/package.scala b/src/compiler/scala/tools/nsc/util/package.scala
index 039fec8605..5faa2f7513 100644
--- a/src/compiler/scala/tools/nsc/util/package.scala
+++ b/src/compiler/scala/tools/nsc/util/package.scala
@@ -3,7 +3,9 @@
  * @author Paul Phillips
  */
 
-package scala.tools.nsc
+package scala
+package tools
+package nsc
 
 import java.io.{ OutputStream, PrintStream, ByteArrayOutputStream, PrintWriter, StringWriter }