[GHC] #8809: Prettier error messages?

[GHC]

#8809: Prettier error messages?
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        Reporter:  joelteon          |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.9
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
  #8809,#10073,#10179                |
       Wiki Page:                    |
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Comment (by joehillen):

 Some great blog posts on compiler error design:

 http://elm-lang.org/blog/compiler-errors-for-humans

 https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8809#comment:22>
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