Error in shutdownHaskell() in Win32 DLL

If an exception occurs in a Windows DLL produced by GHC,
the following error message appears:

ghcDll: internal error: too many hs_exit()s
    Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
    or http://www.sourceforge.net/projects/ghc/

How to reproduce
----------------
1. Make a Haskell DLL using the enclosed Dll.hs and dllMain.c, e.g.
ghc -c Dll.hs -fglasgow-exts
ghc -c dllMain.c
ghc --mk-dll -o test.dll Dll.o Dll_stub.o dllMain.o

2. Generate an export library for the DLL, e.g.
lib /DEF:test.def /MACHINE:x86 /OUT:test.lib

3. Compile the executable with Visual C++ and run it.
cl -c testdll.cpp
link testdll.obj test.lib /OUT:testdll.exe
testdll.exe


Note: if I comment out the shutdownHaskell() call from dllMain.c
(the line marked with /***/), it works fine.

Kind regards,

Cyril


 --- Dll.hs ---
module Dll (test) where

foreign export ccall test :: IO ()

test = error "Exception occurred"

 --- dllMain.c ---
#include <windows.h>
#include <Rts.h>

extern void __stginit_Dll(void);

static char* args[] = { "ghcDll", NULL };

BOOL
STDCALL
DllMain
   ( HANDLE hModule
   , DWORD reason
   , void* reserved
   )
{
  if (reason == DLL_PROCESS_ATTACH) {
      startupHaskell(1, args, __stginit_Dll);
      return TRUE;
  } else if (reason == DLL_PROCESS_DETACH) {
/***/   shutdownHaskell();
  }
  return TRUE;
}

 --- test.def ---
EXPORTS
        test

 --- testdll.cpp ---
extern "C" void test();

int main() {
        test();
        return 0;
}