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, e);
  } catch e2 {
    printStackTrace2(e2); // pcall could lead to endless loops
  }
}