X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcDeriv.lhs;h=550b274ec501ab8ca3b7d29dc06e5a44ddbf6673;hb=b97e1705d4bfd96d6a274d1fe593fff46edd23f6;hp=857999b95b47bc8de6850fdac551400bcde01364;hpb=e6e3c778b0723dd98842f223576dbef4d8ec57a1;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcDeriv.lhs b/compiler/typecheck/TcDeriv.lhs
index 857999b..550b274 100644
--- a/compiler/typecheck/TcDeriv.lhs
+++ b/compiler/typecheck/TcDeriv.lhs
@@ -465,7 +465,7 @@ makeDerivEqns overlap_flag tycl_decls
 		-- If there are no tyvars, there's no need
 		-- to abstract over the dictionaries we need
 	dict_tvs = deriv_tvs ++ tc_tvs
-	dict_args | null dict_tvs = []
+	dict_args -- | null dict_tvs = []
 		  | otherwise     = rep_pred : sc_theta
 
 		-- Finally! Here's where we build the dictionary Id