--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/util/Options.java	2020-03-30 11:59:59.000000000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/util/Options.java	2020-03-30 11:59:59.000000000 -0700
@@ -181,4 +181,9 @@
         for (Runnable r: listeners)
             r.run();
     }
+
+    public void clear() {
+        values.clear();
+        listeners = List.nil();
+    }
 }