[GHC] #9123: Emit quantified Coercible constraints in GeneralizedNewtypeDeriving

GHC ghc-devs at haskell.org
Sun Jul 8 11:14:09 UTC 2018


#9123: Emit quantified Coercible constraints in GeneralizedNewtypeDeriving
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler (Type    |              Version:  7.8.2
  checker)                           |             Keywords:  Roles,
      Resolution:  fixed             |  QuantifiedConstraints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  quantified-
                                     |  constraints/T9123{,a}
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 If we can't come up with a uniform way to generate these constraints, then
 my optimism is probably unwarranted. Let's close this.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9123#comment:71>
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