[GHC] #10249: Suboptimal error message with deferred type errors

[GHC]

#10249: Suboptimal error message with deferred type errors
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        Reporter:  Iceland_jack      |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  GHCi              |                 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 simonpj):

 Yes, that's true. Generally, GHC checks exactly what the user writes, but
 for GHCi it actually checks a synthesised expression wrapping what the
 user writes.

 This would not be difficult to fix; perhaps a bit fiddly. I'm happy to
 advise.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10249#comment:1>
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