title: Compile error in Grails xwiki plugin
body: <p>I'm desperately trying to use the XWiki Grails plugin but had no luck so far. What I did:</p>
  
  <ul>
  <li>grails create-app xwikitest</li>
  <li>add "compile ":xwiki-rendering:1.0-RC3" in BuildConfig.groovy, plugin section.</li>
  <li>cd xwikitest</li>
  <li>grails</li>
  <li>run-app (no controller, empty web-app)
  Now grails answer with these errors:</li>
  </ul>
  
  <p><code>
  | Compiling 50 source files.
  | Error Compilation error: startup failed:
  Compile error during compilation with javac.
  /home/pierre/.grails/2.2.0/projects/xwikitest/plugins/xwiki-rendering-1.0-RC3/src/java/com/monochromeroad/grails/plugins/xwiki/XWikiComponentManager.java:34: type parameters of T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
              return componentManager.getInstance(componentType, hint);
                                                 ^
  /home/pierre/.grails/2.2.0/projects/xwikitest/plugins/xwiki-rendering-1.0-RC3/src/java/com/monochromeroad/grails/plugins/xwiki/XWikiComponentManager.java:42: type parameters of T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
              return componentManager.getInstance(componentType);
                                                 ^
  2 errors</p>
  
  <p>1 error
  | Error Error running script run-app: org.codehaus.groovy.grails.cli.ScriptExitException (Use --stacktrace to see the full trace)</p>
  
  <p></code>
  Running Grails 2.2.0 under Fedora 14</p>
  
  <p>I'm probably missing something obvious but can't find out by myself.
  Any help appreciated, as this is driving crazy. TIA</p>