Index: WeakListenerImpl.java
===================================================================
RCS file: /cvs/openide/src/org/openide/util/WeakListenerImpl.java,v
retrieving revision 1.9
diff -u -r1.9 WeakListenerImpl.java
--- WeakListenerImpl.java	27 Feb 2004 15:43:56 -0000	1.9
+++ WeakListenerImpl.java	25 Mar 2004 12:13:54 -0000
@@ -344,7 +344,16 @@
                     constructors.put (c, new SoftReference (proxyConstructor));
                 }
 
-                proxy = proxyConstructor.newInstance(new Object[] { this });
+                Object p;
+                try {
+                    p = proxyConstructor.newInstance(new Object[] { this });
+                } catch (java.lang.NoClassDefFoundError err) {
+                    // if for some reason the actual creation of the instance
+                    // from constructor fails, try it once more using regular
+                    // method, see issue 30449
+                    p = Proxy.newProxyInstance (c.getClassLoader (), new Class[] { c }, this);
+                }
+                proxy = p;
             } catch (Exception ex) {
                 IllegalStateException e = new IllegalStateException (ex.getMessage ());
                 ErrorManager.getDefault ().annotate (e, ex);