--- a/langtools/test/tools/javac/generics/inference/6638712/T6638712a.java	Thu Nov 18 16:13:11 2010 -0800
+++ b/langtools/test/tools/javac/generics/inference/6638712/T6638712a.java	Tue Nov 23 11:08:43 2010 +0000
@@ -10,7 +10,7 @@
 
 class T6638712a {
 
-    <T> Comparator<T> compound(Iterable<? extends Comparator<? super T>> it) {}
+    <T> Comparator<T> compound(Iterable<? extends Comparator<? super T>> it) { return null; }
 
     public void test(List<Comparator<?>> x) {
         Comparator<String> c3 = compound(x);