ghci can't continue in a situation (HXml Toolbox)

[Ferenc Wagner]

               Hello,

Please have a look at the transcript below.  GHC happily
compiles the file with the Makefile, while GHCi chokes on
it.  I would be grateful for any insight into the problem.

Feri.

tba:~/haskell/xml/ $ cat xml2wiki.hs
import System

import XmlInput
import XmlTree
import XmlState

getLength :: String -> XState () Int
getLength file = do [xmlTree] <- getXmlContents $ newDocument file
                    io $ putStr $ show xmlTree
                    return 14

main :: IO ()
main = do [xmlFile] <- getArgs
          l <- run' $ getLength xmlFile
          putStrLn (show l)

----------------------------------------------------------------------

tba:~/haskell/xml/ $ cat Makefile
HXT := $(HOME)/haskell/xml/HXmlToolbox-3.01
INCLUDES := $(HXT)/hdom:$(HXT)/hparser:$(HXT)/http:$(HXT)/popen:$(HXT)/parsec:$(HOME)/haskell/HTTP
PACKAGES := -package util -package net

xml2wiki: xml2wiki.hs
        ghc -o $@ --make -i$(INCLUDES) $(PACKAGES) $<

----------------------------------------------------------------------

tba:~/haskell/xml/ $ cat .ghci
:set -package net -package util
:set -i/home/wferi/haskell/xml/HXmlToolbox-3.01/hdom:/home/wferi/haskell/xml/HXmlToolbox-3.01/hparser:/home/wferi/haskell/xml/HXmlToolbox-3.01/http:/home/wferi/haskell/xml/HXmlToolbox-3.01/popen:/home/wferi/haskell/xml/HXmlToolbox-3.01/parsec:/home/wferi/haskell/HTTP

----------------------------------------------------------------------

tba:~/haskell/xml/ $ ghci xml2wiki
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.2, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base ... linking ... done.
Loading package lang ... linking ... done.
Loading package concurrent ... linking ... done.
Loading package QuickCheck ... linking ... done.
Loading package readline ... linking ... done.
Loading package unix ... linking ... done.
Loading package posix ... linking ... done.
Loading package util ... linking ... done.
Loading package network ... linking ... done.
Loading package net ... linking ... done.
Skipping  Zord64_HARD      ( /home/wferi/haskell/HTTP/Zord64_HARD.lhs, /home/wferi/haskell/HTTP/Zord64_HARD.o )
Skipping  ParsecPos        ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecPos.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecPos.o )
Skipping  ParsecError      ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecError.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecError.o )
Skipping  ParsecPrim       ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecPrim.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecPrim.o )
Skipping  ParsecChar       ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecChar.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecChar.o )
Skipping  ParsecCombinator ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecCombinator.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/ParsecCombinator.o )
Skipping  Base64           ( /home/wferi/haskell/xml/HXmlToolbox-3.01/http/Base64.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/http/Base64.o )
Skipping  MD5              ( /home/wferi/haskell/HTTP/MD5.lhs, /home/wferi/haskell/HTTP/MD5.o )
Skipping  AssocList        ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/AssocList.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/AssocList.o )
Skipping  NTree            ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/NTree.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/NTree.o )
Skipping  Util             ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/Util.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/Util.o )
Skipping  Unicode          ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/Unicode.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/Unicode.o )
Skipping  Parsec           ( /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/Parsec.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/parsec/Parsec.o )
Skipping  XmlCharParser    ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlCharParser.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlCharParser.o )
Skipping  POpen            ( /home/wferi/haskell/xml/HXmlToolbox-3.01/popen/POpen.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/popen/POpen.o )
Skipping  HTTP             ( /home/wferi/haskell/xml/HXmlToolbox-3.01/http/HTTP.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/http/HTTP.o )
Skipping  Browser          ( /home/wferi/haskell/xml/HXmlToolbox-3.01/http/Browser.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/http/Browser.o )
Skipping  XmlTreeTypes     ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeTypes.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeTypes.o )
Skipping  XmlKeywords      ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlKeywords.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlKeywords.o )
Skipping  XmlTreeFunctions ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeFunctions.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeFunctions.o )
Skipping  XmlTreeFilter    ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeFilter.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTreeFilter.o )
Skipping  MonadStateIO     ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/MonadStateIO.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/MonadStateIO.o )
Skipping  XmlTree          ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTree.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlTree.o )
Skipping  XmlState         ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlState.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/XmlState.o )
Skipping  FormatXmlTree    ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/FormatXmlTree.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hdom/FormatXmlTree.o )
Skipping  XmlOutput        ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlOutput.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlOutput.o )
Skipping  XmlParser        ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlParser.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlParser.o )
Skipping  XmlInput         ( /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlInput.hs, /home/wferi/haskell/xml/HXmlToolbox-3.01/hparser/XmlInput.o )
Compiling Main             ( xml2wiki.hs, interpreted )
Ok, modules loaded: Main, XmlInput, XmlParser, XmlOutput, FormatXmlTree, XmlState, XmlTree, MonadStateIO, XmlTreeFilter, XmlTreeFunctions, XmlKeywords, XmlTreeTypes, Browser, HTTP, POpen, XmlCharParser, Parsec, Unicode, Util, NTree, AssocList, MD5, Base64, ParsecCombinator, ParsecChar, ParsecPrim, ParsecError, ParsecPos, Zord64_HARD.
*Main> run' $ getLength "texi2/lilypond.xml"
Loading package haskell98 ... linking ... done.


GHCi runtime linker: fatal error: I found a duplicate definition for symbol
   __stginit_POpen
whilst processing object file
   /home/wferi/haskell/xml/HXmlToolbox-3.01/popen/POpen.o
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.