De-polymorphise

diff --git a/compiler/typecheck/TcArrows.lhs b/compiler/typecheck/TcArrows.lhs
index 231901c..2e59926 100644 (file)
--- a/compiler/typecheck/TcArrows.lhs
+++ b/compiler/typecheck/TcArrows.lhs
@@ -214,11 +214,10 @@ tc_cmd env cmd@(HsLam (MatchGroup [L mtch_loc (match@(Match pats _maybe_rhs_sig
 
 tc_cmd env cmd@(HsDo do_or_lc stmts body _ty) (cmd_stk, res_ty)
   = do         { checkTc (null cmd_stk) (nonEmptyCmdStkErr cmd)
 
 tc_cmd env cmd@(HsDo do_or_lc stmts body _ty) (cmd_stk, res_ty)
   = do         { checkTc (null cmd_stk) (nonEmptyCmdStkErr cmd)

-       ; (stmts', body') <- tcStmts do_or_lc tc_stmt stmts res_ty $
+       ; (stmts', body') <- tcStmts do_or_lc (tcMDoStmt tc_rhs) stmts res_ty $

                             tcGuardedCmd env body []
        ; return (HsDo do_or_lc stmts' body' res_ty) }
   where
                             tcGuardedCmd env body []
        ; return (HsDo do_or_lc stmts' body' res_ty) }
   where

-    tc_stmt = tcMDoStmt tc_rhs

     tc_rhs rhs = do { ty <- newFlexiTyVarTy liftedTypeKind
                    ; rhs' <- tcCmd env rhs ([], ty)
                    ; return (rhs', ty) }
     tc_rhs rhs = do { ty <- newFlexiTyVarTy liftedTypeKind
                    ; rhs' <- tcCmd env rhs ([], ty)
                    ; return (rhs', ty) }