[GHC] #8103: Segfault when passing unboxed Float# and Double# across modules

[GHC]

#8103: Segfault when passing unboxed Float# and Double# across modules
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        Reporter:  jstolarek      |            Owner:
            Type:  bug            |           Status:  new
        Priority:  highest        |        Milestone:  7.8.1
       Component:  Compiler       |          Version:  7.7
      Resolution:                 |         Keywords:
Operating System:  Linux          |     Architecture:  x86
 Type of failure:  Runtime crash  |       Difficulty:  Unknown
       Test Case:                 |       Blocked By:
        Blocking:  6135           |  Related Tickets:
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Changes (by simonmar):

 * priority:  normal => highest
 * milestone:   => 7.8.1


Comment:

 I tried and failed to reproduce this today, with a freshly built GHC on a
 32-bit x86 Amazon EC2 instance running Ubuntu 12.04.

 {{{
 ubuntu at ip-10-245-94-31:~/scratch$ ~/ghc/inplace/bin/ghc-stage2  8103.hs
 -fforce-recomp
 [1 of 2] Compiling AddWraps         ( AddWraps.hs, AddWraps.o )
 [2 of 2] Compiling Main             ( 8103.hs, 8103.o )
 Linking 8103 ...
 ubuntu at ip-10-245-94-31:~/scratch$ ./8103
 0
 }}}

 Incidentally the Cmm code above cannot be generated on x86, because it
 mentions D1 and D2 which are never used by the x86 backend.  Maybe you
 generated it on x86_64?

 I'm stumped on this one - I tried the repro in #7953 too and that didn't
 crash for me either.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8103#comment:2>
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