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Galchin, Vasili | 3 Dec 08:52
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Re: Data.ByteString vs Data.ByteString.Lazy vs Data.ByteString.Char8

Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package binary-0.4.2 requires bytestring-0.9.0.1
package bio-0.3.4.1 requires bytestring-0.9.1.0


ah ha .. Ketil, this is what you are saying? If so, how do I fix? install a newer version of binary?

regards, vasili

On Wed, Dec 3, 2008 at 1:32 AM, Ketil Malde <ketil <at> malde.org> wrote:
"Galchin, Vasili" <vigalchin <at> gmail.com> writes:

> I think I am getting a namespace collition between
>
>       Data.ByteString.Lazy.Char8.ByteString
>
> and
>
>      Data.ByteString.Lazy.Internal.ByteString ....

You rarely need to import 'Internal' directly.

> here is the error message ....
>
>     Couldn't match expected type `B.ByteString'
>            against inferred type
> `bytestring-0.9.0.1:Data.ByteString.Lazy.Internal.ByteString'

Are you sure this is not just a versioning problem?  I.e. that some
library is built against bytestring-0.X.Y, but your current import is
bytestring-0.A.B, but your program expects these to be the same?  (And
they probably are, but the compiler can't really tell).

-k
--
If I haven't seen further, it is by standing in the footprints of giants

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