From 0d8da265dadfd9170800a60a7d1a59543da5a6f5 Mon Sep 17 00:00:00 2001
From: "simonpj@microsoft.com" <unknown>
Date: Thu, 11 Oct 2007 12:34:26 +0000
Subject: [PATCH] Fix Trac #1680; check for unboxed tuples in
 TcType.marshalableTyCon

---
 compiler/typecheck/TcType.lhs |    1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/typecheck/TcType.lhs b/compiler/typecheck/TcType.lhs
index 388a28d..1d4d166 100644
--- a/compiler/typecheck/TcType.lhs
+++ b/compiler/typecheck/TcType.lhs
@@ -1276,6 +1276,7 @@ legalFFITyCon tc
 marshalableTyCon dflags tc
   =  (dopt Opt_UnliftedFFITypes dflags 
       && isUnLiftedTyCon tc
+      && not (isUnboxedTupleTyCon tc)
       && case tyConPrimRep tc of	-- Note [Marshalling VoidRep]
 	   VoidRep -> False
 	   other   -> True)
-- 
1.7.10.4