diff -r 1d57022fdb6e -r 12c063b39232 jdk/src/share/classes/java/util/IdentityHashMap.java
--- a/jdk/src/share/classes/java/util/IdentityHashMap.java	Tue Aug 30 14:41:12 2011 +0100
+++ b/jdk/src/share/classes/java/util/IdentityHashMap.java	Tue Aug 30 11:53:11 2011 -0700
@@ -703,7 +703,7 @@
             m.table = table.clone();
             return m;
         } catch (CloneNotSupportedException e) {
-            throw new InternalError();
+            throw new InternalError(e);
         }
     }