Is a criminal defendant deprived effective assistance of counsel as guaranteed by the Sixth Amendment when counsel knowingly withholds from the trial court information relevant to a dispositive pretrial motion before advising a criminal defendant to plead guilty, knowing that the defendant's plea agreement with the prosecution reserved the right to appeal the trial court's denial of the dispositive motion?

Is a criminal defendant deprived effective assistance of counsel as guaranteed by the Sixth Amendment when counsel knowingly withholds from the trial court information relevant to a dispositive pretrial motion before advising a criminal defendant to plead guilty, knowing that the defendant's plea agreement with the prosecution reserved the right to appeal the trial court's denial of the dispositive motion?