[web-devel] Yesod devel error: Yesod: panic! System/Plugins.hs:(84, 14)-(86, 29): Non-exhaustive patterns in lambda

Greg Weber greg at gregweber.info
Tue Apr 26 06:51:29 CEST 2011


Hi all,

You should still be able to still use the old wai-handler-devel

Greg Weber

On Mon, Apr 25, 2011 at 9:33 PM, Anton Cheshkov <acheshkov at gmail.com> wrote:

> I have the same problem. It was stop all my work.
>
>
> 2011/4/26 <vagif.verdi at gmail.com>
>
> Completely fresh install of yesod 0.8
>> I migrated my application successfully. It builds and works fine.
>>
>> But when trying yesod devel i get this error:
>>
>> yesod: panic! (the 'impossible' happened)
>>  (GHC version 7.0.2 for x86_64-unknown-linux):
>>        System/Plugins.hs:(84,14)-(86,29): Non-exhaustive patterns in
>> lambda
>>
>>
>> Also cabal gives me following warning on configure:
>>
>> Warning: This package indirectly depends on multiple versions of the same
>> package. This is highly likely to cause a compile failure.
>> package haskell-src-meta-0.3 requires syb-0.2.2
>> package aeson-0.3.2.4 requires syb-0.3
>>
>> Not sure if its related to the error in any way, but it does not affect
>> the
>> build, and my executable works fine.
>>
>> Cheers,
>> Vagif Verdi
>>
>> _______________________________________________
>> 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
>
> _______________________________________________
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> web-devel at haskell.org
> http://www.haskell.org/mailman/listinfo/web-devel
>
>
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