diff -r d17f37522154 -r 7c537f4298fb src/share/classes/com/sun/tools/javac/comp/Flow.java
--- a/src/share/classes/com/sun/tools/javac/comp/Flow.java	Mon Jan 10 14:57:59 2011 -0800
+++ b/src/share/classes/com/sun/tools/javac/comp/Flow.java	Mon Jan 10 15:08:31 2011 -0800
@@ -708,7 +708,7 @@
 
         lint = lint.augment(tree.sym.attributes_field);
 
-        assert pendingExits.isEmpty();
+        Assert.check(pendingExits.isEmpty());
 
         try {
             boolean isInitialConstructor =
@@ -746,7 +746,7 @@
                 PendingExit exit = exits.head;
                 exits = exits.tail;
                 if (exit.thrown == null) {
-                    assert exit.tree.getTag() == JCTree.RETURN;
+                    Assert.check(exit.tree.getTag() == JCTree.RETURN);
                     if (isInitialConstructor) {
                         inits = exit.inits;
                         for (int i = firstadr; i < nextadr; i++)