[GHC] #8993: Fold NullaryTypeClasses into MPTC

[GHC]

#8993: Fold NullaryTypeClasses into MPTC
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        Reporter:  owst              |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"26f41922e8923185bc77ceb8ef44d23564d29bed/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="26f41922e8923185bc77ceb8ef44d23564d29bed"
 Promote TcNullaryTC and TcCoercible to fast tests

 I'm wondering whether it's sensible to omit so many typecheck testcases
 from
 the default validate test target. As for instance, TcNullaryTC has been
 failing
 since its introduction in c63a465011b99eeafbb957074e54c2e6bbf751d9 (re
 #8993) and
 it seems to have gone unnoticed so far.

 Signed-off-by: Herbert Valerio Riedel <hvr at gnu.org>
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8993#comment:8>
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