[GHC] #10181: Lint check: arity invariant

[GHC]

#10181: Lint check: arity invariant
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              Reporter:  nomeata     |             Owner:  nomeata
                  Type:  task        |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.11
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
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 The Arity of an ID should not exceed the arity of its type, nor the arity
 of its strictness signature, if it is a bottoming signatures. This should
 be checked by a lint check (suggested by SPJ in
 https://phabricator.haskell.org/D747?id=2498#inline-6058)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10181>
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