[web-devel] [Haskell-cafe] plugins and internal error: stg_ap_v_ret

[Michael Snoyman]

Hi Andy,

plugins *is* working in general for me for some trivial test cases.
It's specifically this use case with WAI that's causing trouble, which
implies to me I'm misusing the API somehow.

Michael

On Tue, Feb 1, 2011 at 4:22 AM, Andy Stewart <lazycat.manatee at gmail.com> wrote:
> Hi Michael,
>
> plugins use it's own function instead GHC API, so it's easy to break
> with new version GHC.
>
>  -- Andy
>
> Michael Snoyman <michael at snoyman.com>
> writes:
>
>> Hi all,
>>
>> I'm trying to convert wai-handler-devel to use plugins instead of
>> hint, but cannot even get some basic usages to work properly. I've put
>> together a minimal example that loads a WAI application from a
>> separate file and runs it, but this immediately causes the program to
>> crash saying:
>>
>> loader: internal error: stg_ap_v_ret
>>     (GHC version 6.12.3 for i386_unknown_linux)
>>     Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
>>
>> Is this an actual bug in GHC, or am I misusing the plugins package?
>>
>> The two source files:
>>
>> MyModule.hs
>> {-# LANGUAGE OverloadedStrings #-}
>> module MyModule where
>>
>> import Network.Wai
>> import Data.ByteString.Lazy.Char8 ()
>>
>> myapp _ = responseLBS status200 [("Content-Type", "text/plain")] "myapp"
>>
>> loader.hs
>> import System.Plugins.Make
>> import System.Plugins.Load
>> import Network.Wai.Handler.Warp (run)
>>
>> main :: IO ()
>> main = do
>>     MakeSuccess _ obj <- makeAll "MyModule.hs" []
>>     LoadSuccess _ app <- load_ obj [] "myapp"
>>     run 3000 app
>>
>> Thanks,
>> Michael
>
>
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