[GHC] #8227: cgLookupPanic (probably invalid Core

[GHC]

#8227: cgLookupPanic (probably invalid Core
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        Reporter:  guest                         |            Owner:
            Type:  bug                           |           Status:
        Priority:  normal                        |  closed
       Component:  Compiler                      |        Milestone:
      Resolution:  fixed                         |          Version:  7.6.3
Operating System:  MacOS X                       |         Keywords:
 Type of failure:  Compile-time crash            |  cgLookupPanic
       Test Case:                                |     Architecture:
  indexed_types/should_fail/T8227                |  Unknown/Multiple
        Blocking:                                |       Difficulty:
                                                 |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:
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Changes (by simonpj):

 * testcase:   => indexed_types/should_fail/T8227


Old description:

> ghc: panic! (the 'impossible' happened)
>   (GHC version 7.6.3 for x86_64-apple-darwin):
>         cgLookupPanic (probably invalid Core; try -dcore-lint)
>     cobox{v a34t} [lid]

New description:

 {{{
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.6.3 for x86_64-apple-darwin):
         cgLookupPanic (probably invalid Core; try -dcore-lint)
     cobox{v a34t} [lid]
 }}}

--

Comment:

 Thank you!  I've added a regression test.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8227#comment:3>
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