Message299769 
            LB, an exception is a graceful shutdown, not a crash. A crash is a seg fault, core dump, or an OS message 'Your app has stopped unexpectedly'. In #30537, the exception was regarded as expected, not a bug, and changing islice to accept np ints was regarded as an enhancement, and therefore limited to 3.7  |      |
  | Date |  User |  Action |  Args |    | 2017-08-05 03:07:56 | terry.reedy | set | recipients: + terry.reedy, rhettinger, mark.dickinson, braaannigan |   | 2017-08-05 03:07:56 | terry.reedy | set | messageid: <1501902476.76.0.695823656529.issue31097@psf.upfronthosting.co.za> |   | 2017-08-05 03:07:56 | terry.reedy | link | issue31097 messages |   | 2017-08-05 03:07:56 | terry.reedy | create |  |        |