[GHC] #10330: Better Template Haskell error message locations

[GHC]

#10330: Better Template Haskell error message locations
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        Reporter:  simonpj           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Template Haskell  |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by ezyang):

 In that case, let me record one possible workaround for problem (2), which
 is #10331; however, this doesn't help users of the old TH API.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10330#comment:2>
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