[GHC] #15038: Memory Corruption (strange closure type)

[GHC]

#15038: Memory Corruption (strange closure type)
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        Reporter:  andrewthad        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by andrewthad):

 My additional changes have been pushed to the github repo. Also, here's my
 two cents about what I think is going on. The thing that causes the
 problem appears to be:

 {{{
 snmptrapdNaive :: Naive.Trie (Parser Word)
 snmptrapdNaive = Naive.fromStringList
   [ ("STRING: ", P.any >>= \_ -> return 5)
   ]
 }}}

 If I use my parser language to simply build up a parser, and then I run
 the parser, everything works fine. However, sticking it inside of some
 other data structure seems like it causes problems (I'm not sure if it
 matters that the value is a CAF). Also, my parser type is a newtype
 wrapper around a function that uses unboxed sums. I'm also not sure if
 that matters.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15038#comment:11>
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