From e8b4e0d627176e4d4028698e48e1d67440913d88 Mon Sep 17 00:00:00 2001
From: chengduo <zhaochengduo@baidu.com>
Date: Wed, 22 Aug 2018 16:53:21 +0800
Subject: [PATCH] fix load_vars bug (#12869)

---
 python/paddle/fluid/io.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/python/paddle/fluid/io.py b/python/paddle/fluid/io.py
index b3ed094c8..5c4ec99c5 100644
--- a/python/paddle/fluid/io.py
+++ b/python/paddle/fluid/io.py
@@ -406,6 +406,9 @@ def load_vars(executor,
                 attrs={'file_path': os.path.join(dirname, filename)})
         executor.run(load_prog)
 
+        if main_program is None:
+            main_program = default_main_program()
+
         # load slice vars on pserver, if have it.
         _load_slice_up_vars(executor, dirname,
                             main_program._slice_vars_and_attrs)
-- 
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