[GHC] #8134: ghc enters a loop while building 7.6.3 for powerpc64 platform.

[GHC]

#8134: ghc enters a loop while building 7.6.3 for powerpc64 platform.
-------------------------------------+-----------------------------
        Reporter:  k0da              |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.6.3
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  powerpc64
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
-------------------------------------+-----------------------------

Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:8cfbdccb7f8716c2b6b13b3c7884f52b1087d782/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8cfbdccb7f8716c2b6b13b3c7884f52b1087d782"
 Accommodate Derived constraints in two places (fix Trac #8129, #8134)

 If we have
    class (F a ~ b) => C a b
 then we can produce *derived* CFunEqCans.  These were not being
 treated properly in two places:

 a) in TcMType.zonkFlats (Trac #8134)
 b) in TcSMonad.prepareInertsForImplications (Trac #8129)

 This patch fixes both.
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8134#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler