Fix Trac #1680; check for unboxed tuples in TcType.marshalableTyCon

[ghc-hetmet.git] / compiler / typecheck / TcType.lhs

diff --git a/compiler/typecheck/TcType.lhs b/compiler/typecheck/TcType.lhs
index 9525001..1d4d166 100644 (file)
--- a/compiler/typecheck/TcType.lhs
+++ b/compiler/typecheck/TcType.lhs
@@ -15,11 +15,11 @@ The "tc" prefix is for "TypeChecker", because the type checker
 is the principal client.
 
 \begin{code}
-{-# OPTIONS_GHC -w #-}
+{-# OPTIONS -w #-}
 -- The above warning supression flag is a temporary kludge.
 -- While working on this module you are encouraged to remove it and fix
 -- any warnings in the module. See
---     http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
 -- for details
 
 module TcType (
@@ -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)