Make part of the parser a bit stricter

diff --git a/compiler/parser/Parser.y.pp b/compiler/parser/Parser.y.pp
index e0fb04b..e4285ba 100644 (file)
--- a/compiler/parser/Parser.y.pp
+++ b/compiler/parser/Parser.y.pp
@@ -606,8 +606,8 @@ ty_decl :: { LTyClDecl RdrName }
        | data_or_newtype tycl_hdr constrs deriving
                {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
                       ; checkTyVars tparms    -- no type pattern
-                     ; return $
-                         L (comb4 $1 $2 $3 $4)
+                     ; return $!
+                         sL (comb4 $1 $2 $3 $4)
                                   -- We need the location on tycl_hdr in case 
                                   -- constrs and deriving are both empty
                            (mkTyData (unLoc $1) (ctxt, tc, tvs, Nothing) 
@@ -619,8 +619,8 @@ ty_decl :: { LTyClDecl RdrName }
                 deriving
                {% do { let {(ctxt, tc, tvs, tparms) = unLoc $2}
                       ; checkTyVars tparms    -- can have type pats
-                     ; return $
-                         L (comb4 $1 $2 $4 $5)
+                     ; return $!
+                         sL (comb4 $1 $2 $4 $5)
                            (mkTyData (unLoc $1) (ctxt, tc, tvs, Nothing) 
                              (unLoc $3) (reverse (unLoc $5)) (unLoc $6)) } }