[GHC] #10799: "I found a duplicate definition for symbol: __x86.get_pc_thunk.bx" in package network

[GHC]

#10799: "I found a duplicate definition for symbol: __x86.get_pc_thunk.bx" in
package network
-------------------------------------+-------------------------------------
              Reporter:  blueonyx    |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  GHC API     |           Version:  7.10.2
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  Runtime crash
  Unknown/Multiple                   |
             Test Case:              |        Blocked By:
              Blocking:              |   Related Tickets:  #9657
Differential Revisions:              |
-------------------------------------+-------------------------------------
 hi, i get this panic! using hint to interpret code which uses the  network
 package (on 32bit ubuntu):

 {{{
 GHC runtime linker: fatal error: I found a duplicate definition for symbol
    __i686.get_pc_thunk.bx
 whilst processing object file
    /home/mechgen/get_pc_thunk.bx/.cabal-sandbox/lib/i386-linux-
 ghc-7.10.2/network-2.6.2.1-F6mK9sCIw3M5SbZMt2lUQE/libHSnetwork-2.6.2.1-F6mK9sCIw3M5SbZMt2lUQE.a
 This could be caused by:
    * Loading two different object files which export the same symbol
    * Specifying the same object file twice on the GHCi command line
    * An incorrect `package.conf' entry, causing some object to be
      loaded twice.
 Left (GhcException "panic! (the 'impossible' happened)\n  (GHC version
 7.10.2 for i386-unknown-linux):\n\tloadArchive
 \"/home/mechgen/get_pc_thunk.bx/.cabal-sandbox/lib/i386-linux-
 ghc-7.10.2/network-2.6.2.1-F6mK9sCIw3M5SbZMt2lUQE/libHSnetwork-2.6.2.1-F6mK9sCIw3M5SbZMt2lUQE.a\":
 failed\n\nPlease report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug\n")
 }}}

 the problem also arises when the interpreted module imports a module which
 imports network, so it doesn't have to import network directly.

 also "it worked before". i can't really remember the previous working
 versions, but it must have been something like ghc 7.6.3 and haskell-
 platform 2013.2.0.0.

 the related ticket mentioned building without -fPIC, but i can't find it
 in network's cabal file.

 more info:
 {{{
 $  uname -a
 Linux mechgen 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:15:33
 UTC 2013 i686 i686 i386 GNU/Linux
 $  ghc --version
 The Glorious Glasgow Haskell Compilation System, version 7.10.2
 $  cabal --version
 cabal-install version 1.22.6.0
 using version 1.22.4.0 of the Cabal library
 }}}

 to reproduce:

 {{{
 $  mv ~/Compile.hs ~/DummyImportingNetwork.hs .
 $  cabal sandbox init
 $  cabal install  network==2.6.2.1 hint==0.4.2.3
 $  cabal exec -- ghc --make -o compile Compile.hs
 $  PATH=.:$PATH cabal exec compile
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10799>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler