[web-devel] GHCi runtime linker: fatal error: I found a duplicate definition for symbol (Yesod)

Anton Cheshkov acheshkov at gmail.com
Wed Mar 23 18:27:17 CET 2011

Hi Rick! I got the the same error day ago on my server. Probably it happens
because you have two *network* packages in you system.

Try to compile all your packages  only on  network-, and delete
package network-2.3

Hope it helps you

2011/3/23 Rick Richardson <rick.richardson at gmail.com>

> I just installed the generic 7.0.2 binary on Ubuntu  on both 32 bit and 64
> bit machines.  Then I rm'd   .ghc and .cabal  then fetched the current
> haskell platform. Built and installed.
> After cabal installing all of the dependencies cabal said were required for
> yesod,  I run yesod.. the script creates the project.
> When executing runhaskell devel-server.hs  I get this message
> GHCi runtime linker: fatal error: I found a duplicate definition for symbol
>    ghczm7zi0zi2_AsmCodeGen_zdfMonadCmmOptM2_closure
> whilst processing object file
>    /usr/local/lib/ghc-7.0.2/ghc-7.0.2/libHSghc-7.0.2.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.
> GHCi cannot safely continue in this situation.  Exiting now.  Sorry.
> it's the same on both 32 and 64 bit.
> Any ideas?   I am going to try to build 7.0.2 from source to see if that
> fixes it.
> _______________________________________________
> web-devel mailing list
> web-devel at haskell.org
> http://www.haskell.org/mailman/listinfo/web-devel

Best regards,
Cheshkov Anton
Phone: +7 909 005 18 82
Skype: cheshkov_anton
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/web-devel/attachments/20110323/800edb19/attachment.htm>

More information about the web-devel mailing list