[GHC] #12583: Deriving standalone Ix instance for GADT leads to GHC panic

[GHC]

#12583: Deriving standalone Ix instance for GADT leads to GHC panic
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        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash                              |  deriving/should_compile/T12583
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2521
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  merge => closed
 * resolution:   => fixed
 * milestone:   => 8.0.2


Comment:

 Merged to `ghc-8.0` as 706a7305415a8e22b7dc4e2b8406f5b660642d1c and
 43149ea634a99e125bf7e1750953945d04df823b.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12583#comment:5>
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