[GHC] #14527: Warn on recursive bindings

[GHC]

#14527: Warn on recursive bindings
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        Reporter:  chrisdone         |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by adamse):

 It has come back to me: allowing recursive banged bindings was by design.
 See
 https://downloads.haskell.org/~ghc/8.0.1/docs/html/users_guide/glasgow_exts.html
 #recursive-and-polymorphic-let-bindings for details.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14527#comment:6>
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