diff -r d2aaaec153e8 -r 7b413ac1a720 src/share/classes/com/sun/tools/javac/comp/Lower.java
--- a/src/share/classes/com/sun/tools/javac/comp/Lower.java	Wed Sep 29 23:27:57 2010 -0700
+++ b/src/share/classes/com/sun/tools/javac/comp/Lower.java	Thu Sep 30 10:47:12 2010 -0700
@@ -109,7 +109,7 @@
 
         types = Types.instance(context);
         Options options = Options.instance(context);
-        debugLower = options.get("debuglower") != null;
+        debugLower = options.isSet("debuglower");
         pkginfoOpt = PkgInfo.get(options);
     }