--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Wed Jul 27 19:00:53 2011 +0100
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Wed Jul 27 19:01:08 2011 +0100
@@ -1837,7 +1837,7 @@
         try {
             constructor = rs.resolveDiamond(tree.pos(),
                     localEnv,
-                    clazztype.tsym.type,
+                    clazztype,
                     argtypes,
                     typeargtypes);
         } finally {
@@ -2872,8 +2872,10 @@
 
         if (clazztype.tag == CLASS) {
             List<Type> formals = clazztype.tsym.type.getTypeArguments();
-
-            if (actuals.length() == formals.length() || actuals.length() == 0) {
+            if (actuals.isEmpty()) //diamond
+                actuals = formals;
+
+            if (actuals.length() == formals.length()) {
                 List<Type> a = actuals;
                 List<Type> f = formals;
                 while (a.nonEmpty()) {