[GHC] #15917: GHC seems to re-read source of module to produce fancy error msgs

[GHC]

#15917: GHC seems to re-read source of module to produce fancy error msgs
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        Reporter:  Heimdell          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  lowest            |            Milestone:  8.6.3
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  re-reading
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Poor/confusing    |  (amd64)
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by Heimdell):

 * Attachment "re-reads.png" added.


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15917>
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