#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