[Haskell-cafe] plugins and internal error: stg_ap_v_ret

[Andy Stewart]

Hi Michael,

I have write some dynamic-loading code for my Manatee project
(http://hackage.haskell.org/package/manatee)

Dynload.hs use GHC API, if you interested it, you can read source code:

https://patch-tag.com/r/AndyStewart/manatee-core/snapshot/current/content/pretty/Manatee/Core/Dynload.hs

Cheers,

  -- Andy

Michael Snoyman <michael at snoyman.com> writes:

> 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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