diff -r 6db9a3b1a93f -r 5ddecb91d843 src/share/classes/com/sun/tools/javac/code/Type.java
--- a/src/share/classes/com/sun/tools/javac/code/Type.java	Tue Mar 12 16:02:13 2013 +0000
+++ b/src/share/classes/com/sun/tools/javac/code/Type.java	Tue Mar 12 16:02:43 2013 +0000
@@ -1367,7 +1367,7 @@
             for (Type b : prevBounds) {
                 //check for redundancy - use strict version of isSameType on tvars
                 //(as the standard version will lead to false positives w.r.t. clones ivars)
-                if (types.isSameType(b, bound2, true)) return;
+                if (types.isSameType(b, bound2, true) || bound == qtype) return;
             }
             bounds.put(ib, prevBounds.prepend(bound2));
             notifyChange(EnumSet.of(ib));