--- old/src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java	2013-01-18 02:48:15.654178914 -0500
+++ new/src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java	2013-01-18 02:48:14.790130660 -0500
@@ -154,10 +154,11 @@
                 throw new IllegalStateException();
         } else {
             initContext();
+            compilerMain.log = Log.instance(context);
             compilerMain.setOptions(Options.instance(context));
             compilerMain.filenames = new LinkedHashSet<File>();
             Collection<File> filenames = compilerMain.processArgs(CommandLine.parse(args), classNames);
-            if (!filenames.isEmpty())
+            if (filenames != null && !filenames.isEmpty())
                 throw new IllegalArgumentException("Malformed arguments " + toString(filenames, " "));
             compiler = JavaCompiler.instance(context);
             compiler.keepComments = true;