[GHC] #9975: RecordWildcards and PatternSynonyms cause impossible bug

[GHC]

#9975: RecordWildcards and PatternSynonyms cause impossible bug
-------------------------------------+-------------------------------------
        Reporter:  gamegoblin        |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |  RecordWildcards PatternSynonyms
 Type of failure:  Compile-time      |            Architecture:  x86_64
  crash                              |  (amd64)
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by hvr):

 cactus, it's not tagged (RCs weren't tagged in the past either), but
 luckily `ghc --info` nowadays spits out the commit id (and it's contained
 in the src tarball), so it's:


 {{{
 $ tar xOf ghc-7.10.0.20141222-src.tar.xz --wildcards '*/GIT_COMMIT_ID'
 a8c556dfca3eca5277615cc2bf9d6c8f1f143c9a
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9975#comment:5>
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