Re: Error while installing new packages with GHC 7.4.1

Hi Antoras, My suspicion is you've ended up with corrupted packages in your package database - nothing to do with Hoogle. I suspect trying to install parsec-3.1.2 directly would give the same error message. Can you try ghc-pkg list, and at the bottom it will probably say something like: The following packages are broken, either because they have a problem listed above, or because they depend on a broken package. warp-1.1.0 I often find ghc-pkg unregister <warp> --force on all the packages cleans them up enough, but someone else may have a better suggestion. Thanks, Neil On Fri, Mar 2, 2012 at 12:02 AM, Antoras wrote:

Hi Neil,

thanks for your effort. But it still does not work. The old errors disappeared, but new ones occur.

Maybe I have not yet the most current versions:

$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.4.1

$ cabal --version cabal-install version 0.10.2 using version 1.10.1.0 of the Cabal library

This seems to be the most current version of Cabal. The command 'cabal info cabal' brings: "Versions installed: 1.14.0" but not 1.15

An extract of the error messages:

[...] Configuring parsec-3.1.2... Preprocessing library parsec-3.1.2... Building parsec-3.1.2... <command line>: cannot satisfy -package-id text-0.11.1.13-9b63b6813ed4eef16b7793151cdbba4d: text-0.11.1.13-9b63b6813ed4eef16b7793151cdbba4d is unusable due to missing or recursive dependencies: deepseq-1.3.0.0-a73ec930018135e0dc0a1a3d29c74c88

(use -v for more information) <command line>: cannot satisfy -package Cabal-1.14.0: Cabal-1.14.0-5875475606fe70ef919bbc055077d744 is unusable due to missing or recursive dependencies: array-0.4.0.0-59d1cc0e7979167b002f021942d60f46 containers-0.4.2.1-cfc6420ecc2194c9ed977b06bdfd9e69 directory-1.1.0.2-07820857642f1427d8b3bb49f93f97b0 process-1.1.0.1-18dadd8ad5fc640f55a7afdc7aace500 (use -v for more information) [...]

On Thu 01 Mar 2012 11:06:43 PM CET, Neil Mitchell wrote:

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Hi Antoras,

I've just released Hoogle 4.2.9, which allows Cabal 1.15, so hopefully will install correctly for you.

Thanks, Neil

On Thu, Mar 1, 2012 at 5:02 PM, Neil Mitchell  wrote:

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Hi Antoras,

The darcs version of Hoogle has had a more permissive dependency for a few weeks. Had I realised the dependency caused problems I'd have released a new version immediately! As it stands, I'll release a new version in about 4 hours. If you can't wait that long, try darcs get http://code.haskell.org/hoogle

Thanks, Neil

On Thursday, March 1, 2012, Antoras wrote:

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Ok, interesting info. But how to solve the problem now? Should I contact the author of Hoogle and ask him about how solving this?

On 03/01/2012 02:02 AM, Albert Y. C. Lai wrote:

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On 12-02-29 06:04 AM, Antoras wrote:

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I don't know where the dependency to array-0.3.0.3 comes from. Is it possible to get more info from cabal than -v?

hoogle-4.2.8 has "Cabal>= 1.8&&  <  1.13", this brings in Cabal-1.12.0.

Cabal-1.12.0 has "array>= 0.1&&  <  0.4", this brings in array-0.3.0.3.

It is a mess to have 2nd instances of libraries that already come with GHC, unless you are an expert in knowing and avoiding the treacherous consequences. See my http://www.vex.net/~trebla/haskell/sicp.xhtml

It is possible to fish the output of "cabal install --dry-run -v3 hoogle" for why array-0.3.0.3 is brought in. It really is fishing, since the output is copious and of low information density. Chinese idiom: needle in ocean (haystack is too easy). Example:

"selecting hoogle-4.2.8 (hackage) and discarding Cabal-1.1.6, 1.2.1, 1.2.2.0, 1.2.3.0, 1.2.4.0, 1.4.0.0, 1.4.0.1, 1.4.0.2, 1.6.0.1, 1.6.0.2, 1.6.0.3, 1.14.0, blaze-builder-0.1, case-insensitive-0.1,"

We see that selecting hoogle-4.2.8 causes ruling out Cabal 1.14.0

Similarly, the line for "selecting Cabal-1.12.0" mentions ruling out array-0.4.0.0

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