[GHC] #16096: let x = ... and x = ... are not the same in GHCi

[GHC]

#16096: let x = ... and x = ... are not the same in GHCi
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        Reporter:  osa1              |                Owner:  osa1
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.6.3
      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 RyanGlScott):

 Two things to keep in mind when fixing this:

 * #11606 is also caused by this discrepancy, so it would be worth checking
 to see if this is fixed.
 * I had to implement a hack in my fix for #12091
 (ddb870bf7055ccc8ff8b86c161f31aad81d01add) to account for this
 discrepancy, so if this is fixed, we might be able to remove this hack.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16096#comment:4>
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