[GHC] #11580: panic on incompatible options

[GHC]

#11580: panic on incompatible options
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           Reporter:  dougm          |             Owner:
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  7.8.4
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 This torture test causes ghc to panic for incompatible options Unsafe and
 Trustworthy
 {{{
     ghc `ghc --supported-languages | sed 's/^/-X/'`
 }}}
 The two options alone lead to a correct diagnostic.
 So does deletion of either from the full list.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11580>
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