tree a324f174f9274f55ae0b95d0d5a8983aba3effe3
parent 7d97f06e4cfdf4249d6384e41208d7bc0ece202a
author Tony Mack <tmack@paris.CS.Princeton.EDU> 1365553599 -0400
committer Tony Mack <tmack@paris.CS.Princeton.EDU> 1365553599 -0400

raise exception if user cannot be found