diff -r d17f37522154 -r 7c537f4298fb src/share/classes/com/sun/tools/javac/tree/JCTree.java
--- a/src/share/classes/com/sun/tools/javac/tree/JCTree.java	Mon Jan 10 14:57:59 2011 -0800
+++ b/src/share/classes/com/sun/tools/javac/tree/JCTree.java	Mon Jan 10 15:08:31 2011 -0800
@@ -2235,7 +2235,7 @@
         public void visitErroneous(JCErroneous that)         { visitTree(that); }
         public void visitLetExpr(LetExpr that)               { visitTree(that); }
 
-        public void visitTree(JCTree that)                   { assert false; }
+        public void visitTree(JCTree that)                   { Assert.error(); }
     }
 
 }