[GHC] #14339: GHC 8.2.1 regression when combining GND with TypeError (solveDerivEqns: probable loop)

[GHC]

#14339: GHC 8.2.1 regression when combining GND with TypeError (solveDerivEqns:
probable loop)
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  high              |            Milestone:  8.2.2
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |             Keywords:  deriving,
      Resolution:                    |  CustomTypeErrors
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  testsuite/tests/deriving/should_compile/T14339
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * milestone:  8.2.3 => 8.2.2


Comment:

 Ahh, good catch RyanGlScott. Actually I think we can sneak it in to 8.2.2.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14339#comment:6>
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