[GHC] #10447: DeriveFoldable rejects instances with constraints in last argument of data type

[GHC]

#10447: DeriveFoldable rejects instances with constraints in last argument of data
type
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        Reporter:  RyanGlScott       |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #8678             |  Differential Revisions:  Phab:D1031
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"2c5c29722c78e089eda0baa7ff89154b58f23165/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="2c5c29722c78e089eda0baa7ff89154b58f23165"
 DeriveFoldable for data types with existential constraints (#10447)

 Reviewers: dolio, shachaf, ekmett, austin, #core_libraries_committee,
 simonpj, bgamari

 Reviewed By: simonpj, bgamari

 Subscribers: thomie, bgamari

 Differential Revision: https://phabricator.haskell.org/D1031

 GHC Trac Issues: #10447
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10447#comment:23>
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