title: java.lang.LinkageError: loader constraint violation ... EquinoxClassLoader / VNative
body: <p>I get the following exception when running my Eclipse RCP application. Has somebody already met such an error?</p>
  
  <p>I think it may come from multiple plugin importing the VNative class, is it possible ?</p>
  
  <pre><code>java.lang.LinkageError: loader constraint violation: loader (instance of org/eclipse/osgi/internal/loader/EquinoxClassLoader) previously initiated loading for a different type with name "org/eclipse/nebula/cwt/v/VNative"
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
      at org.eclipse.osgi.internal.loader.ModuleClassLoader.defineClass(ModuleClassLoader.java:276)
      at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:655)
      at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:578)
      at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:538)
      at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:525)
      at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:328)
      at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:368)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:446)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:395)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:387)
      at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:150)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
      at org.eclipse.nebula.widgets.cdatetime.CDateTime.removeTextListener(CDateTime.java:1429)
      at org.eclipse.nebula.widgets.cdatetime.CDateTime.addTextListener(CDateTime.java:391)
      at org.eclipse.nebula.widgets.cdatetime.CDateTime.init(CDateTime.java:1339)
      at org.eclipse.nebula.widgets.cdatetime.CDateTime.&lt;init&gt;(CDateTime.java:346)
  </code></pre>