[GHC] #8705: Type inference regression with local dictionaries

[GHC]

#8705: Type inference regression with local dictionaries
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        Reporter:  goldfire                 |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  high                     |        Milestone:  7.8.1
       Component:  Compiler (Type checker)  |          Version:  7.8.1-rc1
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"89d2c048c81020a701ac94d949b4d6f1ced37cfa/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="89d2c048c81020a701ac94d949b4d6f1ced37cfa"
 Keep kind-inconsistent Given type equalities (fixes Trac #8705)

 I was too eager when fixing Trac #8566, and dropped too many
 equalities on the floor, thereby causing Trac #8705.

 The fix is easy: delete code.  Lots of new comments!
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8705#comment:7>
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