add -fsimpleopt-before-flatten

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

diff --git a/compiler/rename/RnPat.lhs b/compiler/rename/RnPat.lhs
index d8bcb22..76be451 100644 (file)
--- a/compiler/rename/RnPat.lhs
+++ b/compiler/rename/RnPat.lhs
@@ -245,7 +245,7 @@ rnPat :: HsMatchContext Name -- for error messages
       -> RnM (a, FreeVars)     -- Variables bound by pattern do not 
                               -- appear in the result FreeVars 
 rnPat ctxt pat thing_inside 
-  = rnPats ctxt [pat] (\[pat'] -> thing_inside pat')
+  = rnPats ctxt [pat] (\pats' -> let [pat'] = pats' in thing_inside pat')
 
 applyNameMaker :: NameMaker -> Located RdrName -> RnM Name
 applyNameMaker mk rdr = do { (n, _fvs) <- runCps (newName mk rdr); return n }