From: simonpj <unknown>
Date: Tue, 13 Mar 2001 16:57:34 +0000 (+0000)
Subject: [project @ 2001-03-13 16:57:34 by simonpj]
X-Git-Tag: Approximately_9120_patches~2427
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=8f7d8614c5ea91e2df8c26ba4871e19b71a97805;p=ghc-hetmet.git

[project @ 2001-03-13 16:57:34 by simonpj]
Add error location for deriving failure errors
---

diff --git a/ghc/compiler/typecheck/TcDeriv.lhs b/ghc/compiler/typecheck/TcDeriv.lhs
index 298d2dd..86084ab 100644
--- a/ghc/compiler/typecheck/TcDeriv.lhs
+++ b/ghc/compiler/typecheck/TcDeriv.lhs
@@ -405,7 +405,8 @@ solveDerivEqns inst_env_in orig_eqns
         in
 	    -- Simplify each RHS
 	tcSetInstEnv inst_env (
-	  listTc [ tcAddErrCtxt (derivCtxt tc) $
+	  listTc [ tcAddSrcLoc (getSrcLoc tc)	$
+		   tcAddErrCtxt (derivCtxt tc)	$
 		   tcSimplifyThetas deriv_rhs
 	         | (_, _,tc,_,deriv_rhs) <- orig_eqns ]  
 	)					`thenTc` \ next_solns ->