[GHC] #4815: Instance constraints should be used when deriving on associated data types

[GHC]

#4815: Instance constraints should be used when deriving on associated data types
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        Reporter:  batterseapower    |                Owner:  (none)
            Type:  feature request   |               Status:  closed
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  6.12.3
      Resolution:  invalid           |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12863, #14462    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => closed
 * resolution:   => invalid
 * related:  #12863 => #12863, #14462


Comment:

 I'm going to close this, since:

 1. The consensus appears to be that this isn't desirable.
 2. We're operating under this consensus in other tickets (see #14462, for
 example).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4815#comment:21>
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