diff -r 7db12f12a04e -r 6b51ef804d49 langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java
--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Wed Mar 02 21:06:17 2011 -0800
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java	Wed Mar 02 21:13:55 2011 -0800
@@ -2980,7 +2980,7 @@
             // (see comment for TypeVar.bound).
             // In this case, generate a class tree that represents the
             // bound class, ...
-            JCTree extending;
+            JCExpression extending;
             List<JCExpression> implementing;
             if ((bs.head.tsym.flags() & INTERFACE) == 0) {
                 extending = tree.bounds.head;