[GHC] #12387: Template Haskell ignores class instance definitions with methods that don't belong to the class

[GHC]

#12387: Template Haskell ignores class instance definitions with methods that don't
belong to the class
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC accepts       |  Unknown/Multiple
  invalid program                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4710
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => patch
 * differential:   => Phab:D4710


Comment:

 I've implemented the idea from comment:4 in Phab:D4710.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12387#comment:5>
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