[GHC] #13758: Deriving can't find an instance that holds, standalone deriving works

[GHC]

#13758: Deriving can't find an instance that holds, standalone deriving works
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        Reporter:  Iceland_jack      |                Owner:  (none)
            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:  #2721, #8165      |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"c82314085f2721915ea143a53f09de111aee7edb/ghc"
 c8231408/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c82314085f2721915ea143a53f09de111aee7edb"
 Add regression test for #13758
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13758#comment:4>
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