[GHC] #11711: Typechecker assertion failure

[GHC]

#11711: Typechecker assertion failure
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 And now, the Core Lint error is fixed, too. There was a `tcSubType` call
 in !TcPat that was the wrong way round. This fix will come in my next raft
 of fixes.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11711#comment:6>
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