Task: Text Categorization
Input (English): {57} however, even if he did not waive the issue by withdrawing the request, he did waive the kastigar issue when he entered a guilty plea. united states v. gaffney, 469 f.3d 211, 215 (1st cir.2006), citing united states v. lujan, 324 f.3d 27, 30 (1st cir.2003) (a guilty plea waives an appeal based on a kastigar claim based on the fifth amendment.).
Output (English): non-overruling