Fix do-notation so that it works with -DDEBUG

[ghc-hetmet.git] / compiler / specialise / Specialise.lhs

diff --git a/compiler/specialise/Specialise.lhs b/compiler/specialise/Specialise.lhs
index 37d5d81..67dc39c 100644 (file)
--- a/compiler/specialise/Specialise.lhs
+++ b/compiler/specialise/Specialise.lhs
@@ -805,10 +805,10 @@ specDefn subst calls (fn, rhs)
               rhs_uds `plusUDs` plusUDList spec_uds)
 
   | otherwise  -- No calls or RHS doesn't fit our preconceptions
-  = WARN( notNull calls_for_me, ptext SLIT("Missed specialisation opportunity for") <+> ppr fn ) do
+  = WARN( notNull calls_for_me, ptext SLIT("Missed specialisation opportunity for") <+> ppr fn )
          -- Note [Specialisation shape]
-    (rhs', rhs_uds) <- specExpr subst rhs
-    return ((fn, rhs'), [], rhs_uds)
+    (do  { (rhs', rhs_uds) <- specExpr subst rhs
+       ; return ((fn, rhs'), [], rhs_uds) })
   
   where
     fn_type           = idType fn