[GHC] #14544: doCorePass has at least one missing case

[GHC]

#14544: doCorePass has at least one missing case
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           Reporter:  mpickering     |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.1
           Keywords:  newcomer       |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 There is a catch all at the end of `doCorePass` which hides the fact that
 `doCorePass` should be total. In particular `doCorePass` is not
 implemented for `CoreOccurAnal` and so either `CoreOccurAnal` should be
 removed from `CoreToDo` or implemented properly in `doCorePass`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14544>
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