@@ -0,0 +1,163 @@
+package sfBugs;%0A%0Apublic class Bug1564367 %7B%0A    void f(Object x, Object y) %7B%0A        if (y == null)%0A            x = y;%0A        else System.out.println(x);%0A    %7D%0A%0A%7D%0A

add sourceforge test case