// if adding a trial read/write, insert it into the set
if (change & FD_TRIAL_NOTE_MASK && !(old_m & FD_TRIAL_NOTE_MASK))
trials.insert(eh->GetFd());
// if adding a trial read/write, insert it into the set
if (change & FD_TRIAL_NOTE_MASK && !(old_m & FD_TRIAL_NOTE_MASK))
trials.insert(eh->GetFd());