[GHC] #13465: Foldable deriving treatment of tuples is too surprising

[GHC]

#13465: Foldable deriving treatment of tuples is too surprising
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Sorry, the claim that the behavior of existing programs would change is
 false—it would only cause some existing programs that currently compile to
 no longer compile, which I think is acceptable.

 Also, here's the [https://mail.haskell.org/pipermail/ghc-
 devs/2017-March/013995.html ghc-devs mailing list] discussion on the
 matter.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13465#comment:4>
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