diff --git a/paddle/scripts/docker/build.sh b/paddle/scripts/docker/build.sh
old mode 100755
new mode 100644
diff --git a/paddle/scripts/travis/build_doc.sh b/paddle/scripts/travis/build_doc.sh
old mode 100755
new mode 100644
diff --git a/python/paddle/fluid/parallel_executor.py b/python/paddle/fluid/parallel_executor.py
index 4153049c05a71fe827abfefd68b31b1d095b5782..1b3ba414ecb50cc4d75dcaecd1f31265334c9aec 100644
--- a/python/paddle/fluid/parallel_executor.py
+++ b/python/paddle/fluid/parallel_executor.py
@@ -76,6 +76,9 @@ class ParallelExecutor(object):
           or numpy array.
         :return: fetched value list.
         """
+        if not isinstance(feed_dict, dict):
+            raise TypeError("feed_dict should be a dict")
+
         feed_tensor_dict = {}
         for i, feed_name in enumerate(feed_dict):
             feed_tensor = feed_dict[feed_name]
diff --git a/tools/codestyle/cpplint_pre_commit.hook b/tools/codestyle/cpplint_pre_commit.hook
old mode 100755
new mode 100644