Fix for problem:

There is a bug in JavaScriptException which prevents it from being used with
out a Rhino Context.  When the getMessage() method is invoked on it, the
exception goes to the ScriptRuntime to toString the value.  If you have
already exited your context, the runtime will throw an error.  The solution
is to simply remove the overridden getMessage method from
JavaScriptException.  JavaScriptException's constructor calls the Exception
constructor with the toString'ed value.  The default implementation of
getMessage will return the exception message.

Jeff

js/rhino/src/org/mozilla/javascript/JavaScriptException.java

@@ -58,15 +58,6 @@ public class JavaScriptException extends Exception {
         this.value = value;
     }
 
-    /**
-     * Get the exception message.
-     *
-     * <p>Will just convert the wrapped exception to a string.
-     */
-    public String getMessage() {
-        return ScriptRuntime.toString(value);
-    }
-
     static JavaScriptException wrapException(Scriptable scope,
                                              Throwable exn)
     {