Merge remote branch 'origin/master' into ghc-new-co

[ghc-hetmet.git] / compiler / rename / RnBinds.lhs

diff --git a/compiler/rename/RnBinds.lhs b/compiler/rename/RnBinds.lhs
index 21822a8..286e3f2 100644 (file)
--- a/compiler/rename/RnBinds.lhs
+++ b/compiler/rename/RnBinds.lhs
@@ -306,7 +306,10 @@ rnValBindsRHS trim mb_bound_names (ValBindsIn mbinds sigs)
            (anal_binds, anal_dus) -> return (valbind', valbind'_dus)
               where
                 valbind' = ValBindsOut anal_binds sigs'
-                valbind'_dus = usesOnly (hsSigsFVs sigs') `plusDU` anal_dus
+                valbind'_dus = anal_dus `plusDU` usesOnly (hsSigsFVs sigs')
+                              -- Put the sig uses *after* the bindings
+                              -- so that the binders are removed from 
+                              -- the uses in the sigs
        }
 
 rnValBindsRHS _ _ b = pprPanic "rnValBindsRHS" (ppr b)
@@ -455,7 +458,7 @@ rnBind :: (Name -> [Name])          -- Signature tyvar function
 rnBind _ trim (L loc bind@(PatBind { pat_lhs = pat
                                    , pat_rhs = grhss 
                                       -- pat fvs were stored in bind_fvs
-                                      -- after processing the LHS          
+                                      -- after processing the LHS
                                    , bind_fvs = pat_fvs }))
   = setSrcSpan loc $ 
     do { let bndrs = collectPatBinders pat
@@ -475,7 +478,7 @@ rnBind sig_fn trim
                             , fun_infix = is_infix 
                             , fun_matches = matches })) 
        -- invariant: no free vars here when it's a FunBind
-  = setSrcSpan loc $ 
+  = setSrcSpan loc $
     do { let plain_name = unLoc name
 
        ; (matches', fvs) <- bindSigTyVarsFV (sig_fn plain_name) $