// TODO: subclass RuntimeException and use Meta instead of DynamicObject
static class PersistableThrowable extends DynamicObject {
  S className;
  S msg;
  S stacktrace;
  settable transient Throwable actualThrowable;
  
  *() {}
  *(Throwable e) {
    actualThrowable = e;
    if (e == null)
      className = "Crazy Null Error";
    else {
      className = getClassName(e).replace('/', '.');
      msg = e.getMessage();
      stacktrace = getStackTrace_noRecord(e);
    }
  }
  
  public S toString() {
    ret nempty(msg) ? className + ": " + msg : className;
  }
  
  RuntimeException asRuntimeException() {
    if (actualThrowable != null)
      ret main asRuntimeException(actualThrowable);
    ret new Fail(this);
  }
}