[GHC] #8586: internal error: evacuate(static): strange closure type 5189

[GHC]

#8586: internal error: evacuate(static): strange closure type 5189
----------------------------+-------------------------------
       Reporter:  guest     |             Owner:
           Type:  bug       |            Status:  new
       Priority:  normal    |         Milestone:
      Component:  Compiler  |           Version:  7.6.3
       Keywords:  crash     |  Operating System:  Windows
   Architecture:  x86       |   Type of failure:  GHCi crash
     Difficulty:  Unknown   |         Test Case:
     Blocked By:            |          Blocking:
Related Tickets:            |
----------------------------+-------------------------------
 I cannot reproduce this reliably, but it happened once. Here’s what I did:

 * Install Yesod
 * Scaffold a blank Yesod project with no DB
 * Run GHCi
 * :l Foundation.hs
 * :info AForm

 Output:

 {{{
 newtype AForm m a
   = AForm {unAForm :: (HandlerSite m, [Text])
                       -> Maybe (Env, FileEnv)
                       -> Ints
                       -> m (FormResult a,
                             [FieldView (HandlerSite m)] -> [FieldView
 (HandlerSite m)],
                             Ints,
                             Enctype)}
         -- Defined in `Yesod.Form.Types'
 instance Monad m => Functor (AForm m)
   -- Defined in `Yesod.Form.Types'
 instance (Monad m, Monoid a) => Monoid (AForm m a)
   -- Defined in `Yesod.Form.Types'
 instance MonadTransghc.exe: internal error: evacuate(static): strange
 closure type 5189
     (GHC version 7.6.3 for i386_unknown_mingw32)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug

 This application has requested the Runtime to terminate it in an unusual
 way.
 Please contact the application's support team for more information.
 }}}

 (P.S. I chose 'x86' for the Architecture because it’s running as 32-bit,
 but I’m actually using 64-bit Windows.)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8586>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler