RE: GHCi Package problem?

On 03 February 2005 16:11, Martin Erwig wrote:

> On Feb 3, 2005, at 2:13 AM, Simon Marlow wrote:
> 
>>> 
>>>    Prelude> Data.Graph.Inductive.Example.clr486
>>> 
>>>    GHCi runtime linker: fatal error: I found a duplicate definition
>>>       for symbol
>>>    _DataziGraphziInductiveziInternalziFiniteMap_Empty_closure
>>>       whilst processing object file
>>>    ./Data/Graph/Inductive/Internal/FiniteMap.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. 
>>> 
>>> I don't know what to do about this.
>> 
>> Looks like GHCi is trying to load an object file for a module that is
>> already present in the package.  If
>> Data.Graph.Inductive.Internal.FiniteMap is present in the fgl
>> package, then you shouldn't also have it in the current directory,
> 
> I don't.
> 
> There is another FiniteMap.hi (and FiniteMap.p_hi) in
> 
>     /usr/local/lib/ghc-6.2/imports/Data
> 
> Could this be the offender?

No.  The error message says that it is trying to load
./Data/Graph/Inductive/Internal/FiniteMap.o.  but that module is already
part of the fgl package isn't it?  (when I said current directory, I
really meant "relative to the current directory").

Cheers,
        Simon