[project @ 2003-02-14 14:19:29 by simonpj]

Comments

diff --git a/ghc/compiler/typecheck/TcSimplify.lhs b/ghc/compiler/typecheck/TcSimplify.lhs
index 90fcb9c..6c845aa 100644 (file)
--- a/ghc/compiler/typecheck/TcSimplify.lhs
+++ b/ghc/compiler/typecheck/TcSimplify.lhs
@@ -1608,6 +1608,8 @@ It's OK: the final zonking stage should zap y to (), which is fine.
 
 \begin{code}
 tcSimplifyTop :: [Inst] -> TcM TcDictBinds
+-- The TcLclEnv should be valid here, solely to improve
+-- error message generation for the monomorphism restriction
 tcSimplifyTop wanteds
   = getLclEnv                                                  `thenM` \ lcl_env ->
     traceTc (text "tcSimplifyTop" <+> ppr (lclEnvElts lcl_env))        `thenM_`