[GHC] #15892: Segmentation fault with ByteString and -O

[GHC]

#15892: Segmentation fault with ByteString and -O
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        Reporter:  akio           |                Owner:  (none)
            Type:  bug            |               Status:  new
        Priority:  normal         |            Milestone:  8.6.3
       Component:  Compiler       |              Version:  8.6.2
      Resolution:                 |             Keywords:
Operating System:  Linux          |         Architecture:  x86_64 (amd64)
 Type of failure:  Runtime crash  |            Test Case:
      Blocked By:                 |             Blocking:
 Related Tickets:                 |  Differential Rev(s):
       Wiki Page:                 |
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Comment (by fumieval):

 Here's an equivalent code with bytestring operations unrolled:
 https://github.com/tsurucapital/segfault/blob/fumieval/app/Main.hs

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15892#comment:3>
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