[GHC] #12930: DDEBUG build broken

[GHC]

#12930: DDEBUG build broken
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        Reporter:  mpickering        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Matthew Pickering <matthewtpickering@…>):

 In [changeset:"6e4188abf36d3b489ff7c9586ca49fe922f2beb7/ghc" 6e4188a/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6e4188abf36d3b489ff7c9586ca49fe922f2beb7"
 Fix unsafe usage of `is_iloc` selector in Ord instance for ImportSpec

 Summary:
 This fixes tests rn017, T7672 and closed #12930.

 Both these tests were self referential module imports through hs-boot
 files. As a result, I am quite suspicious of what the ImpAll constructor
 is
 used for. I had a brief hunt around but couldn't immediately see whether
 it was necessary.

 Reviewers: austin, bgamari

 Subscribers: simonpj, thomie, nomeata

 Differential Revision: https://phabricator.haskell.org/D2793

 GHC Trac Issues: #12930
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12930#comment:2>
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