[GHC] #16041: Address warnings reported by -Wincomplete-uni-patterns and -Wincomplete-record-updates

[GHC]

#16041: Address warnings reported by -Wincomplete-uni-patterns and -Wincomplete-
record-updates
-------------------------------------+-------------------------------------
           Reporter:  ckoparkar      |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:  8.10.1
          Component:  Compiler       |           Version:  8.6.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:  #15656
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 While implementing the GHC proposal which adds these flags to {{{-Wall}}},
 we suppressed a lot of warnings generated due to code that is considered
 ''unsafe'' per these flags. However, the proper way to fix this is to
 refine things so that these warnings go away. See
 https://ghc.haskell.org/trac/ghc/ticket/15656#comment:6 for more details.
 w

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16041>
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