Someone

  // schedule this object for deletion
  wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
  if ( traits )
  {
      // let the traits object decide what to do with us
      traits->ScheduleForDestroy(this);
  }
  else // no app or no traits
  {
      // in wxBase we might have no app object at all, don't leak memory
      delete this;
  }