[GHC] #12658: GHC 7.10.3 sometimes reports unimplemented/strange closure type 63270

[GHC]

#12658: GHC 7.10.3 sometimes reports unimplemented/strange closure type 63270
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        Reporter:  clint               |                Owner:
            Type:  bug                 |               Status:  new
        Priority:  normal              |            Milestone:
       Component:  Compiler            |              Version:  7.10.3
      Resolution:                      |             Keywords:
Operating System:  Linux               |         Architecture:  powerpc
 Type of failure:  Compile-time crash  |            Test Case:
      Blocked By:                      |             Blocking:
 Related Tickets:                      |  Differential Rev(s):
       Wiki Page:                      |
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Comment (by clint):

 On the buildds it is often a SIGABRT instead.  I cannot reproduce it
 myself.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12658#comment:2>
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