use primerr for stacktraces and better errors
use primerr for stacktraces and better errors

brownplt/LambdaS5,logchi/LambdaS5,lijunsong/LambdaS5,brownplt/LambdaS5,logchi/LambdaS5,lijunsong/LambdaS5,logchi/LambdaS5,brownplt/LambdaS5,lijunsong/LambdaS5