title: sbt fails with java.lang.NoClassDefFoundError: sbt/ConsoleOut$
body: <p>After using sbt for some time, something failed and I can't run sbt on my Ubuntu machine. I get this exception no matter what I do. Even running <code>sbt help</code> causes the following error:</p>
  
  <pre><code>java.lang.NoClassDefFoundError: sbt/ConsoleOut$
      at sbt.StandardMain$.&lt;init&gt;(Main.scala:52)
      at sbt.StandardMain$.&lt;clinit&gt;(Main.scala)
      at sbt.xMain.run(Main.scala:26)
      at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:57)
      at xsbt.boot.Launch$.withContextLoader(Launch.scala:77)
      at xsbt.boot.Launch$.run(Launch.scala:57)
      at xsbt.boot.Launch$$anonfun$explicit$1.apply(Launch.scala:45)
      at xsbt.boot.Launch$.launch(Launch.scala:65)
      at xsbt.boot.Launch$.apply(Launch.scala:16)
      at xsbt.boot.Boot$.runImpl(Boot.scala:32)
      at xsbt.boot.Boot$.main(Boot.scala:21)
      at xsbt.boot.Boot.main(Boot.scala)
  Caused by: java.lang.ClassNotFoundException: sbt.ConsoleOut$
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
      ... 12 more
  Error during sbt execution: java.lang.NoClassDefFoundError: sbt/ConsoleOut$
  </code></pre>
  
  <p>I reinstalled the JDK and of course sbt, but it didn't help. The only thing I remember doing was installing the new IntelliJ IDEA 13. Could this be related?</p>