[GHC] #12458: Segfault in GHCi runtime type reconstruction

[GHC]

#12458: Segfault in GHCi runtime type reconstruction
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           Reporter:  mniip          |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  GHCi           |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  GHCi crash
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 {{{#!hs
 GHCi, version 8.0.1: http://www.haskell.org/ghc/  :? for help
 Prelude> data D a = D
 Prelude> d = D
 Prelude> :print d
 d = (_t1::D a)
 Prelude> d `seq` ()
 ()
 Segmentation fault (core dumped)
 }}}
 This is unrelated to #12449 because we're evaluating `d` which has a
 proper type and not `_t1`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12458>
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