static volatile Throwable _handleException_lastException;
static L _handleException_onException = synchroList(ll(f printStackTrace2));

static void _handleException(Throwable e) {
  _handleException_lastException = e;
  for (O f : cloneList(_handleException_onException))
    try {
      callF(f, args);
    } catch e {
      printStackTrace2(e); // pcall could lead to endless loops
    }
  }
}