#5053: Internal error with runhaskell and System.Plugins.dynload
---------------------------------+------------------------------------------
Reporter: robnik | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.2 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
I've been trying to learn how to use the `plugins` package, specifically
the `dynload` function. I ran some code and got the message below: (The
"Loading" is from my program)
{{{
> runhaskell Main.hs
Loading
Main.hs: internal error: evacuate: strange closure type 894
(GHC version 7.0.2 for i386_apple_darwin)
Please report this as a GHC bug:
http://www.haskell.org/ghc/reportabug
}}}
I've copied the two relevant files below - Main.hs and Plug.hs. Before
running Main.hs I compiled Plug.hs to Plug.o by running `ghc -c Plug.hs`.
All files are in the same directory.
Main.hs:
{{{
-- Test dynamic loading
module Main (main) where
import System.Plugins
import Data.Dynamic
main :: IO ()
main = do
putStrLn "Loading"
mv <- dynload "Plug.o" [] [] "thing"
putStrLn "Loaded"
case mv of
LoadFailure msgs -> putStrLn "fail" >> print msgs
LoadSuccess _ v -> putStrLn "success" >> print (v::Integer)
}}}
Plug.hs:
{{{
module Plug (thing) where
import Data.Dynamic
thing :: Dynamic
thing = toDyn (1234000::Integer)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5053>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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