better check for bad slice_cred
better check for bad slice_cred

plantigrade/geni-tools,ahelsing/geni-tools,GENI-NSF/gram,GENI-NSF/gram,tcmitchell/geni-tools,ahelsing/geni-tools,tcmitchell/geni-tools,GENI-NSF/gram,plantigrade/geni-tools