[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 osa1):

 I managed to reproduce this without stack or cabal. Steps:

 - Install dependencies: `cabal install containers split ghc-prim
 primitive`
 - Build the executable: `ghc-stage2 common/Data/Trie/Naive.hs
 src/Packed/Bytes.hs src/Packed/Bytes/Parser.hs src/Packed/Bytes/Small.hs
 src/Packed/Bytes/Stream/ST.hs src/Packed/Bytes/Window.hs test/Main.hs
 test/Parser.hs  -fforce-recomp -o main`
 - Run `./main`

 It works fine with `-O0`, fails with `-O1` and `-O2`, but with different
 "strange closure" types. `-O1` prints 16661, `-O2` prints 16665. Even more
 interestingly I get a different number if I also add `-debug`: 16621.

 The object with "strange closure type" is a static one, and does not
 reside in heap. On my system it's at 0x967900.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15038#comment:7>
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