--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Tue Sep 25 11:55:34 2012 +0100
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Tue Sep 25 11:56:46 2012 +0100
@@ -737,7 +737,7 @@
         return attr.new ResultInfo(VAL, to, checkContext) {
             @Override
             protected Type check(DiagnosticPosition pos, Type found) {
-                return super.check(pos, chk.checkNonVoid(pos, types.capture(types.upperBound(found))));
+                return super.check(pos, chk.checkNonVoid(pos, types.capture(types.upperBound(found.baseType()))));
             }
         };
     }