[GHC] #10836: Better error reporting for closed type families

[GHC]

#10836: Better error reporting for closed type families
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        Reporter:  jstolarek         |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.11
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Incorrect         |            Test Case:
  warning at compile-time            |  typecheck/should_fail/T10836
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Replying to [comment:4 jstolarek]:

 > But I only get the first one. Is this expected?

 I think so. GHC gives up if type-checking the type & class definitions
 fails. Otherwise, who knows what terrible type errors might happen?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10836#comment:6>
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