From: simonpj@microsoft.com <unknown>
Date: Sun, 22 Apr 2007 21:19:37 +0000 (+0000)
Subject: Warning police
X-Git-Tag: 2007-05-06~132
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=7edaba2692e2c3c47e24d5746b5cf16233bca6e5

Warning police
---

diff --git a/compiler/typecheck/TcDeriv.lhs b/compiler/typecheck/TcDeriv.lhs
index 7a584cd..58db618 100644
--- a/compiler/typecheck/TcDeriv.lhs
+++ b/compiler/typecheck/TcDeriv.lhs
@@ -381,6 +381,8 @@ deriveTyData (deriv_pred, L loc decl@(TyData { tcdLName = L _ tycon_name,
 		-- The "deriv_pred" is a LHsType to take account of the fact that for
 		-- newtype deriving we allow deriving (forall a. C [a]).
 	; mkEqnHelp DerivOrigin (tvs++deriv_tvs) cls cls_tys tc_app } }
+deriveTyData (deriv_pred, other_decl)
+  = panic "derivTyData"	-- Caller ensures that only TyData can happen
 
 ------------------------------------------------------------------
 mkEqnHelp orig tvs cls cls_tys tc_app