[GHC] #12788: While using Data.Aeson.TH, "Irrefutable pattern failed for pattern sel_id : _"

[GHC]

#12788: While using Data.Aeson.TH, "Irrefutable pattern failed for pattern sel_id :
_"
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        Reporter:  jchia             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"ec22bacdd625b04d28228dd5522d59d0bc8b1152/ghc" ec22bac/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ec22bacdd625b04d28228dd5522d59d0bc8b1152"
 Add test for #12788

 Commit bce99086e9f54909f51ff5a74cb8c666083bb021 (#12584) fixed #12788.
 Let's
 add a test to make sure it stays fixed.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12788#comment:8>
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