[GHC] #12881: GHC 8.0.2 regression involving OVERLAP annotations

[GHC]

#12881: GHC 8.0.2 regression involving OVERLAP annotations
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        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.2-rc1
      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 RyanGlScott):

 Well, we're lucky in that:

 1. There are "only" seven Stackage libraries affected by this bug
 2. It's easy to convince people that their code in wrong in this case
 3. There's an easy workaround

 I'll try to just patch up these libraries, add a note to the release guide
 about this, and declare victory.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12881#comment:7>
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