[GHC] #11746: I encountered an: internal error: evacuate: strange closure type 803645000

[GHC]

#11746: I encountered an: internal error: evacuate: strange closure type 803645000
-------------------------------+--------------------------------------
        Reporter:  hkBst       |                Owner:
            Type:  bug         |               Status:  new
        Priority:  high        |            Milestone:  8.0.1
       Component:  Compiler    |              Version:  7.10.3
      Resolution:              |             Keywords:
Operating System:  Linux       |         Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |            Test Case:
      Blocked By:              |             Blocking:
 Related Tickets:              |  Differential Rev(s):
       Wiki Page:              |
-------------------------------+--------------------------------------
Changes (by bgamari):

 * priority:  normal => high
 * cc: simonmar (added)
 * milestone:   => 8.0.1


Comment:

 I can also reproduce this with your example. Simply load the file into
 ghci and run,
 {{{
 $ ghci tinychess.hs
 GHCi, version 7.10.2.20151118: http://www.haskell.org/ghc/  :? for help
 [1 of 1] Compiling Main             ( tinychess.hs, interpreted )
 Ok, modules loaded: Main.
 λ> import Control.Monad (forever)
 λ> forever $ playGame 6
 .
 .
 .
    D---+---+---C
    |   | K |   |
    \---A---A---/
 [-2,3,-3,5,-3,3]
 <interactive>: internal error: evacuate: strange closure type 1195407224
     (GHC version 7.10.2.20151118 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Aborted
 $
 }}}

 The problem is evidently still lurking as I see segmentation faults if I
 run the same test with a recent `ghc-8.0` snapshot.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11746#comment:2>
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