title: Why are the compilation errors when loading Scala build files?
body: <p>sbt 0.12.4 on Windows.</p>
  
  <p>Firstly, I move into the project directory, that is <code>example</code> - a Scala project under sbt. When I run <code>sbt</code>, I get the following errors:</p>
  
  <pre><code>C:\programs\example&gt;sbt
  [info] Loading project definition from C:\programs\example\project\project
  [info] Updating {file:/C:/programs/example/project/project/}default-2ad7de...
  [info] Resolving org.scala-sbt#sbt;0.12.4 ...
  [info] Resolving org.scala-sbt#main;0.12.4 ...
  [info] Resolving org.scala-sbt#actions;0.12.4 ...
  [info] Resolving org.scala-sbt#classpath;0.12.4 ...
  [info] Resolving org.scala-sbt#launcher-interface;0.12.4 ...
  [info] Resolving org.scala-lang#scala-library;2.9.2 ...
  [info] Resolving org.scala-sbt#interface;0.12.4 ...
  [info] Resolving org.scala-sbt#io;0.12.4 ...
  [info] Resolving org.scala-sbt#control;0.12.4 ...
  [info] Resolving org.scala-lang#scala-compiler;2.9.2 ...
  [info] Resolving org.scala-sbt#completion;0.12.4 ...
  [info] Resolving org.scala-sbt#collections;0.12.4 ...
  [info] Resolving jline#jline;1.0 ...
  [info] Resolving org.scala-sbt#api;0.12.4 ...
  [info] Resolving org.scala-sbt#compiler-integration;0.12.4 ...
  [info] Resolving org.scala-sbt#incremental-compiler;0.12.4 ...
  [info] Resolving org.scala-sbt#logging;0.12.4 ...
  [info] Resolving org.scala-sbt#process;0.12.4 ...
  [info] Resolving org.scala-sbt#compile;0.12.4 ...
  [info] Resolving org.scala-sbt#persist;0.12.4 ...
  [info] Resolving org.scala-tools.sbinary#sbinary_2.9.0;0.4.0 ...
  [info] Resolving org.scala-sbt#classfile;0.12.4 ...
  [info] Resolving org.scala-sbt#compiler-ivy-integration;0.12.4 ...
  [info] Resolving org.scala-sbt#ivy;0.12.4 ...
  [info] Resolving org.apache.ivy#ivy;2.3.0-rc1 ...
  [info] Resolving com.jcraft#jsch;0.1.46 ...
  [info] Resolving commons-httpclient#commons-httpclient;3.1 ...
  [info] Resolving commons-logging#commons-logging;1.0.4 ...
  [info] Resolving commons-codec#commons-codec;1.2 ...
  [info] Resolving org.scala-sbt#run;0.12.4 ...
  [info] Resolving org.scala-sbt#task-system;0.12.4 ...
  [info] Resolving org.scala-sbt#tasks;0.12.4 ...
  [info] Resolving org.scala-sbt#tracking;0.12.4 ...
  [info] Resolving org.scala-sbt#cache;0.12.4 ...
  [info] Resolving org.scala-sbt#testing;0.12.4 ...
  [info] Resolving org.scala-sbt#test-agent;0.12.4 ...
  [info] Resolving org.scala-tools.testing#test-interface;0.5 ...
  [info] Resolving org.scala-sbt#command;0.12.4 ...
  [info] Resolving org.scala-sbt#compiler-interface;0.12.4 ...
  [info] Resolving org.scala-sbt#precompiled-2_8_2;0.12.4 ...
  [info] Resolving org.scala-sbt#precompiled-2_9_3;0.12.4 ...
  [info] Resolving org.scala-sbt#precompiled-2_10_1;0.12.4 ...
  [info] Done updating.
  [info] Loading project definition from C:\programs\example\project
  [info] Updating {file:/C:/programs/example/project/}default-116b7c...
  [info] Resolving net.databinder#dispatch-http_2.9.2;0.8.8 ...
  [info] Resolving net.databinder#dispatch-core_2.9.2;0.8.8 ...
  [info] Resolving org.scala-lang#scala-library;2.9.2 ...
  [info] Resolving org.apache.httpcomponents#httpclient;4.1.3 ...
  [info] Resolving org.apache.httpcomponents#httpcore;4.1.4 ...
  [info] Resolving commons-logging#commons-logging;1.1.1 ...
  [info] Resolving commons-codec#commons-codec;1.4 ...
  [info] Resolving net.databinder#dispatch-futures_2.9.2;0.8.8 ...
  //some mor like the above
  [info] Done updating.
  [info] Compiling 8 Scala sources to C:\programs\example\project\target\scala-2.9
  .2\sbt-0.12\classes...
  [error] C:\programs\example\project\ProgFunBuild.scala:190: object Test is not a
   value
  [error]     (argTask, currentProject, baseDirectory, handoutFiles, submitProject
  Name, target, projectDetailsMap, compile in Test) map { (args, currentProject, b
  asedir, filesFinder, submitProject, targetDir, detailsMap, _) =&gt;
  [error]
                                          ^
  [error] C:\programs\example\project\ProgFunBuild.scala:56: object Test is not a
  value
  [error]     (unmanagedSourceDirectories in Test) &lt;&lt;= (scalaSource in Test)(Seq(_
  )),
  [error]                                    ^
  [error] C:\programs\example\project\ProgFunBuild.scala:265: object Test is not a
   value
  [error]     (unmanagedSources in Test) &lt;&lt;= (unmanagedSources in Test, scalaSourc
  e in Test, projectDetailsMap, currentProject, gradingTestPackages) map { (source
  s, srcTestScalaDir, detailsMap, projectName, gradingSrcs) =&gt;
  [error]                          ^
  [error] C:\programs\example\project\ProgFunBuild.scala:265: reassignment to val
  [error]     (unmanagedSources in Test) &lt;&lt;= (unmanagedSources in Test, scalaSourc
  e in Test, projectDetailsMap, currentProject, gradingTestPackages) map { (source
  s, srcTestScalaDir, detailsMap, projectName, gradingSrcs) =&gt;
  [error]                                ^
  [error] C:\programs\example\project\ProgFunBuild.scala:288: object Test is not a
  value
  [error]   val setTestPropertiesHook = (test in Test) &lt;&lt;= (test in Test).dependsO
  n(setTestProperties)
  [error]                                        ^
  [error] C:\programs\example\project\ProgFunBuild.scala:288: reassignment to val
  [error]   val setTestPropertiesHook = (test in Test) &lt;&lt;= (test in Test).dependsO
  n(setTestProperties)
  [error]                                              ^
  [error] C:\programs\example\project\ProgFunBuild.scala:304: object Test is not a
   value
  [error]       compile in Test,
  [error]                  ^
  [error] C:\programs\example\project\ProgFunBuild.scala:512: object Test is not a
   value
  [error]   val readTestCompileLog = (compile in Test) &lt;&lt;= (compile in Test) mapR
  handleFailure(compileTestFailed)
  [error]                                        ^
  [error] C:\programs\example\project\ProgFunBuild.scala:512: reassignment to val
  [error]   val readTestCompileLog = (compile in Test) &lt;&lt;= (compile in Test) mapR
  handleFailure(compileTestFailed)
  [error]                                              ^
  [error] C:\programs\example\project\ProgFunBuild.scala:553: object Test is not a
  value
  [error]     (sourceDirectory in Test) &lt;&lt;= (sourceDirectory in (assignmentProject
  , Test))
  [error]                         ^
  [error] C:\programs\example\project\ProgFunBuild.scala:553: reassignment to val
  [error]     (sourceDirectory in Test) &lt;&lt;= (sourceDirectory in (assignmentProject
  , Test))
  [error]                               ^
  [error] C:\programs\example\project\ProgFunBuild.scala:561: object Test is not a
   value
  [error]     (unmanagedSources in Test) &lt;&lt;= (unmanagedSources in Test, scalaSourc
  e in (assignmentProject, Test), gradingTestPackages in assignmentProject, gradeP
  rojectDetails) map { (sources, testSrcScalaDir, gradingSrcs, project) =&gt;
  [error]                          ^
  [error] C:\programs\example\project\ProgFunBuild.scala:561: reassignment to val
  [error]     (unmanagedSources in Test) &lt;&lt;= (unmanagedSources in Test, scalaSourc
  e in (assignmentProject, Test), gradingTestPackages in assignmentProject, gradeP
  rojectDetails) map { (sources, testSrcScalaDir, gradingSrcs, project) =&gt;
  [error]                                ^
  [error] C:\programs\example\project\ProgFunBuild.scala:570: object Test is not a
   value
  [error]      compile in Test,
  [error]                 ^
  [error] 14 errors found
  [error] (compile:compile) Compilation failed
  Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?
  </code></pre>
  
  <p><strong>UPDATE</strong>
  When I press <code>l</code> at the commmand prompt, the error log is as follows:</p>
  
  <pre><code>[info] Loading project definition from C:\A\example\project\project
  [debug] Running task... Cancelable: false, check cycles: false
  [debug]
  [debug] Initial source changes:
  [debug]         removed:Set()
  [debug]         added: Set()
  [debug]         modified: Set()
  [debug] Removed products: Set()
  [debug] Modified external sources: Set()
  [debug] Modified binary dependencies: Set()
  [debug] Initial directly invalidated sources: Set()
  [debug]
  [debug] Sources indirectly invalidated by:
  [debug]         product: Set()
  [debug]         binary dep: Set()
  [debug]         external source: Set()
  [debug] All initially invalidated sources: Set()
  [debug] Copy resource mappings:
  [debug]
  [info] Loading project definition from C:\A\example\project
  [debug] Running task... Cancelable: false, check cycles: false
  [debug]
  [debug] Initial source changes:
  [debug]         removed:Set()
  [debug]         added: Set(C:\A\example\project\Settings.scala, C:\A\example\pro
  ject\StyleChecker.scala, C:\A\example\project\GradingFeedback.scala, C:\A\exampl
  e\project\CourseraHttp.scala, C:\A\example\project\ProgFunBuild.scala, C:\A\exam
  ple\project\ScalaTestRunner.scala, C:\A\example\project\RichJsValue.scala, C:\A\
  example\project\RecordingLogger.scala)
  [debug]         modified: Set()
  [debug] Removed products: Set()
  [debug] Modified external sources: Set()
  [debug] Modified binary dependencies: Set()
  [debug] Initial directly invalidated sources: Set(C:\A\example\project\Settings.
  scala, C:\A\example\project\StyleChecker.scala, C:\A\example\project\GradingFeed
  back.scala, C:\A\example\project\CourseraHttp.scala, C:\A\example\project\ProgFu
  nBuild.scala, C:\A\example\project\ScalaTestRunner.scala, C:\A\example\project\R
  ichJsValue.scala, C:\A\example\project\RecordingLogger.scala)
  [debug]
  [debug] Sources indirectly invalidated by:
  [debug]         product: Set()
  [debug]         binary dep: Set()
  [debug]         external source: Set()
  [debug] All initially invalidated sources: Set(C:\A\example\project\Settings.sca
  la, C:\A\example\project\StyleChecker.scala, C:\A\example\project\GradingFeedbac
  k.scala, C:\A\example\project\CourseraHttp.scala, C:\A\example\project\ProgFunBu
  ild.scala, C:\A\example\project\ScalaTestRunner.scala, C:\A\example\project\Rich
  JsValue.scala, C:\A\example\project\RecordingLogger.scala)
  [debug] Recompiling all 8 sources: invalidated sources (8) exceeded 50.0% of all
   sources
  [info] Compiling 8 Scala sources to C:\A\example\project\target\scala-2.9.2\sbt-
  0.12\classes...
  [debug] Getting compiler-interface from component compiler for Scala 2.9.2
  [debug] Getting compiler-interface from component compiler for Scala 2.9.2
  [debug] Running cached compiler b206e9, interfacing (CompilerInterface) with Sca
  la compiler version 2.9.2
  [debug] Calling Scala compiler with arguments  (CompilerInterface):
  [debug]         -deprecation
  [debug]         -d
  [debug]         C:\A\example\project\target\scala-2.9.2\sbt-0.12\classes
  [debug]         -bootclasspath
  [debug]         C:\Program Files\Java\jre6\lib\resources.jar;C:\Program Files\Ja
  va\jre6\lib\rt.jar;C:\Program Files\Java\jre6\lib\sunrsasign.jar;C:\Program File
  s\Java\jre6\lib\jsse.jar;C:\Program Files\Java\jre6\lib\jce.jar;C:\Program Files
  \Java\jre6\lib\charsets.jar;C:\Program Files\Java\jre6\lib\modules\jdk.boot.jar;
  C:\Program Files\Java\jre6\classes;C:\Documents and Settings\User\.sbt\boot\scal
  a-2.9.2\lib\scala-library.jar
  [debug]         -classpath
  [debug]         C:\A\example\project\target\scala-2.9.2\sbt-0.12\classes;C:\Docu
  ments and Settings\User\.ivy2\cache\net.databinder\dispatch-http_2.9.2\jars\disp
  atch-http_2.9.2-0.8.8.jar;C:\Documents and Settings\User\.ivy2\cache\net.databin
  der\dispatch-core_2.9.2\jars\dispatch-core_2.9.2-0.8.8.jar;C:\Documents and Sett
  ings\User\.ivy2\cache\org.apache.httpcomponents\httpclient\jars\httpclient-4.1.3
  .jar;C:\Documents and Settings\User\.ivy2\cache\org.apache.httpcomponents\httpco
  re\jars\httpcore-4.1.4.jar;C:\Documents and Settings\User\.ivy2\cache\commons-lo
  gging\commons-logging\jars\commons-logging-1.1.1.jar;C:\Documents and Settings\U
  ser\.ivy2\cache\commons-codec\commons-codec\jars\commons-codec-1.4.jar;C:\Docume
  nts and Settings\User\.ivy2\cache\net.databinder\dispatch-futures_2.9.2\jars\dis
  patch-futures_2.9.2-0.8.8.jar;C:\Documents and Settings\User\.ivy2\cache\org.sca
  lastyle\scalastyle_2.9.1\jars\scalastyle_2.9.1-0.1.3-SNAPSHOT.jar;C:\Documents a
  nd Settings\User\.ivy2\cache\org.scalariform\scalariform_2.9.1\jars\scalariform_
  2.9.1-0.1.1.jar;C:\Documents and Settings\User\.ivy2\cache\com.github.scopt\scop
  t_2.9.1\jars\scopt_2.9.1-2.0.0.jar;C:\Documents and Settings\User\.ivy2\cache\cc
  .spray\spray-json_2.9.2\jars\spray-json_2.9.2-1.1.1.jar;C:\Documents and Setting
  s\User\.ivy2\cache\org.parboiled\parboiled-scala\jars\parboiled-scala-1.0.2.jar;
  C:\Documents and Settings\User\.ivy2\cache\org.parboiled\parboiled-core\jars\par
  boiled-core-1.0.2.jar;C:\Documents and Settings\User\.ivy2\cache\org.scalatest\s
  calatest_2.9.2\jars\scalatest_2.9.2-1.9.1.jar;C:\Documents and Settings\User\.iv
  y2\cache\org.apache.commons\commons-lang3\jars\commons-lang3-3.1.jar;C:\Document
  s and Settings\User\.ivy2\cache\scala_2.9.2\sbt_0.12\com.typesafe.sbteclipse\sbt
  eclipse-plugin\jars\sbteclipse-plugin-2.1.0.jar;C:\Documents and Settings\User\.
  ivy2\cache\scala_2.9.2\sbt_0.12\com.typesafe.sbteclipse\sbteclipse-core\jars\sbt
  eclipse-core-2.1.0.jar;C:\Documents and Settings\User\.ivy2\cache\org.scalaz\sca
  laz-core_2.9.2\jars\scalaz-core_2.9.2-6.0.4.jar;C:\Documents and Settings\User\.
  ivy2\cache\org.scala-sbt\sbt\jars\sbt-0.12.4.jar;C:\Documents and Settings\User\
  .ivy2\cache\org.scala-sbt\main\jars\main-0.12.4.jar;C:\Documents and Settings\Us
  er\.ivy2\cache\org.scala-sbt\actions\jars\actions-0.12.4.jar;C:\Documents and Se
  ttings\User\.ivy2\cache\org.scala-sbt\classpath\jars\classpath-0.12.4.jar;C:\Doc
  uments and Settings\User\.ivy2\cache\org.scala-sbt\launcher-interface\jars\launc
  her-interface-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sb
  t\interface\jars\interface-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache
  \org.scala-sbt\io\jars\io-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\
  org.scala-sbt\control\jars\control-0.12.4.jar;C:\Documents and Settings\User\.sb
  t\boot\scala-2.9.2\lib\scala-compiler.jar;C:\Documents and Settings\User\.ivy2\c
  ache\org.scala-sbt\completion\jars\completion-0.12.4.jar;C:\Documents and Settin
  gs\User\.ivy2\cache\org.scala-sbt\collections\jars\collections-0.12.4.jar;C:\Doc
  uments and Settings\User\.ivy2\cache\jline\jline\jars\jline-1.0.jar;C:\Documents
   and Settings\User\.ivy2\cache\org.scala-sbt\api\jars\api-0.12.4.jar;C:\Document
  s and Settings\User\.ivy2\cache\org.scala-sbt\compiler-integration\jars\compiler
  -integration-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt
  \incremental-compiler\jars\incremental-compiler-0.12.4.jar;C:\Documents and Sett
  ings\User\.ivy2\cache\org.scala-sbt\logging\jars\logging-0.12.4.jar;C:\Documents
   and Settings\User\.ivy2\cache\org.scala-sbt\process\jars\process-0.12.4.jar;C:\
  Documents and Settings\User\.ivy2\cache\org.scala-sbt\compile\jars\compile-0.12.
  4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\persist\jars\pers
  ist-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-tools.sbinar
  y\sbinary_2.9.0\jars\sbinary_2.9.0-0.4.0.jar;C:\Documents and Settings\User\.ivy
  2\cache\org.scala-sbt\classfile\jars\classfile-0.12.4.jar;C:\Documents and Setti
  ngs\User\.ivy2\cache\org.scala-sbt\compiler-ivy-integration\jars\compiler-ivy-in
  tegration-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\iv
  y\jars\ivy-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.apache.ivy\
  ivy\jars\ivy-2.3.0-rc1.jar;C:\Documents and Settings\User\.ivy2\cache\com.jcraft
  \jsch\jars\jsch-0.1.46.jar;C:\Documents and Settings\User\.ivy2\cache\commons-ht
  tpclient\commons-httpclient\jars\commons-httpclient-3.1.jar;C:\Documents and Set
  tings\User\.ivy2\cache\org.scala-sbt\run\jars\run-0.12.4.jar;C:\Documents and Se
  ttings\User\.ivy2\cache\org.scala-sbt\task-system\jars\task-system-0.12.4.jar;C:
  \Documents and Settings\User\.ivy2\cache\org.scala-sbt\tasks\jars\tasks-0.12.4.j
  ar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\tracking\jars\tracki
  ng-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\cache\jar
  s\cache-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\test
  ing\jars\testing-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala
  -sbt\test-agent\jars\test-agent-0.12.4.jar;C:\Documents and Settings\User\.ivy2\
  cache\org.scala-tools.testing\test-interface\jars\test-interface-0.5.jar;C:\Docu
  ments and Settings\User\.ivy2\cache\org.scala-sbt\command\jars\command-0.12.4.ja
  r;C:\Documents and Settings\User\.ivy2\cache\org.scala-sbt\compiler-interface\ja
  rs\compiler-interface-bin-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\
  org.scala-sbt\compiler-interface\jars\compiler-interface-src-0.12.4.jar;C:\Docum
  ents and Settings\User\.ivy2\cache\org.scala-sbt\precompiled-2_8_2\jars\compiler
  -interface-bin-0.12.4.jar;C:\Documents and Settings\User\.ivy2\cache\org.scala-s
  bt\precompiled-2_9_3\jars\compiler-interface-bin-0.12.4.jar;C:\Documents and Set
  tings\User\.ivy2\cache\org.scala-sbt\precompiled-2_10_1\jars\compiler-interface-
  bin-0.12.4.jar
  </code></pre>