I'm trying to run the following code. I'm not at all sure it's correct, it's based off of a bit of poking around in the ghc api. Running it with a command line argument like "show (5 + 2)" gives me a segmentation fault. Poking around with gdb and following the steps at http://hackage.haskell.org/trac/ghc/wiki/Debugging/CompiledCode yields precisely nothing, as even the "disassemble" command complains "No function contains program counter for selected frame." Any ideas? == code == module Main where import GHC import DynFlags import Data.Dynamic import System evalString :: Typeable a => String -> IO (Maybe a) evalString s = defaultErrorHandler defaultDynFlags $ runGhc Nothing $ do dynflags <- getSessionDynFlags setSessionDynFlags $ dynflags target <- guessTarget "Prelude" Nothing setTargets [target] load LoadAllTargets dyn <- dynCompileExpr s return $ fromDynamic dyn main = do (s:_) <- getArgs e <- evalString s putStrLn $ maybe "oops" id e -- Edward Amsden Undergraduate Computer Science Rochester Institute of Technology www.edwardamsden.com