[GHC] #12864: Produce type errors after looking at whole applications

[GHC]

#12864: Produce type errors after looking at whole applications
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        Reporter:  nomeata           |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I'm all for it, if you can see how to achieve it!

 The second paragraph of the Description is extremely hard to parse.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12864#comment:3>
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