title: Code completion issues with the Scala-IDE and Eclipse Juno
body: <p>I'm using Eclipse Juno with the Java (Java build 1.7.0_05-b05 64bit) and Scala-IDE plugin 
  (Scala IDE for Eclipse  2.1.0.nightly-2_09-201207100348-f1d9c23 org.scala-ide.sdt.feature.feature.group scala-ide.org).</p>
  
  <p>Below are my custom settings for Eclipse eclipse.ini:</p>
  
  <pre><code>-vmargs
  -Dosgi.requiredJavaVersion=1.7
  -Dhelp.lucene.tokenizer=standard
  -Xss8m
  -Xms256m
  -Xmx1536m
  -XX:PermSize=64m
  -server
  -Xverify:none
  -XX:+UnlockExperimentalVMOptions
  -XX:+UseG1GC
  -XX:MaxGCPauseMillis=50
  -XX:+DoEscapeAnalysis
  -XX:+UseCompressedOops
  </code></pre>
  
  <p>Every-time I try to use code completion Eclipse throwing me 2 error windows:</p>
  
  <pre><code>The 'Code Recommenders Calls Proposals' proposal computer from
  the 'org.eclipse.recommenders.completion.rcp.calls' plug-in did
  not complete normally.
  The extension has thrown a runtime exception.
  </code></pre>
  
  <p>and</p>
  
  <pre><code>The 'Code Recommenders Overrides Proposals' proposal computer from
  the 'org.eclipse.recommenders.completion.rcp.overrides' plug-in did
  not complete normally.
  The extension has thrown a runtime exception.
  </code></pre>
  
  <p>My scala-ide log below shows:</p>
  
  <pre><code>[Xlint:cantFindType]
  2012-07-10 15:37:29,404 ERROR [main] - System.err - 
  [org.eclipse.jdt.launching] error can't determine modifiers of missing type
  org.eclipse.pde.internal.ui.wizards.imports.PluginImportHelper
  when weaving type org.eclipse.jdt.launching.JavaRuntime
  when weaving classes 
  when weaving 
  [Xlint:cantFindType]
  </code></pre>
  
  <p>Is there any way to fix this?</p>
  
  <p>Thank you.</p>
  
  <p><strong>UPDATE 1</strong>:
  After disabling code Recommenders I'm getting a different error in my Slaca-Ide log:</p>
  
  <pre><code>2012-07-10 16:10:24,342 ERROR [main] - System.err - [org.eclipse.jdt.debug.ui] 
  error can't determine modifiers of missing type
  org.eclipse.pde.internal.ui.wizards.imports.PluginImportHelper
  when weaving type org.eclipse.jdt.internal.debug.ui.actions.ToggleBreakpointAdapter
  when weaving classes
  when weaving 
  [Xlint:cantFindType]
  </code></pre>
  
  <p>but the scala code completion now works ok</p>