From 8f403c07048bd7361db53b5976e04c198c409fc7 Mon Sep 17 00:00:00 2001
From: Ivan Shcheklein <shcheklein@gmail.com>
Date: Mon, 4 Nov 2019 13:01:28 -0800
Subject: [PATCH] fix NPE when we do get that does not provide progress
 callback

---
 dvc/output/base.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dvc/output/base.py b/dvc/output/base.py
index 8fa3ad367..df2d3d2ce 100644
--- a/dvc/output/base.py
+++ b/dvc/output/base.py
@@ -287,7 +287,8 @@ class OutputBase(object):
 
     def checkout(self, force=False, progress_callback=None, tag=None):
         if not self.use_cache:
-            progress_callback(str(self.path_info), self.get_files_number())
+            if progress_callback:
+                progress_callback(str(self.path_info), self.get_files_number())
             return None
 
         if tag: