When using the GHC API with this minimal example, using the -fexternal-interpreter option, compiled with profiling enabled:

import GHC
import Control.Monad.IO.Class
import GHC.Paths ( libdir )
import DynFlags
import Linker

main = runGhc (Just libdir) $ do
        env <- getSession
        dflags <- getSessionDynFlags
        liftIO $ initDynLinker env
        setSessionDynFlags (setGeneralFlag' Opt_ExternalInterpreter dflags) 
        target <- guessTarget "A.hs" Nothing
        setTargets [target]
        load LoadAllTargets

Invoking the main executable:

testprof

While A.hs contains a TH splice:

{-# LANGUAGE TemplateHaskell #-}
module A where

$(return [])

The compiler crashes:

Access violation in generated code when writing 0000000000000024

Probably I'm misusing the API in this example, but the way it crashes is suspicious.