Merge branch 'develop'

2 files changed, 6 insertions, 2 deletions

diff --git a/pip/__init__.py b/pip/__init__.py
index e89c4301a..b04cb00e0 100755
--- a/pip/__init__.py
+++ b/pip/__init__.py
@@ -30,7 +30,7 @@ import pip.cmdoptions
 cmdoptions = pip.cmdoptions
 
 # The version as used in the setup.py and the docs conf.py
-__version__ = "7.1.1"
+__version__ = "7.2.0.dev0"
 
 
 logger = logging.getLogger(__name__)
diff --git a/pip/utils/outdated.py b/pip/utils/outdated.py
index 5549b7865..6365c6c06 100644
--- a/pip/utils/outdated.py
+++ b/pip/utils/outdated.py
@@ -99,7 +99,11 @@ def pip_version_check(session):
     the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
     of the pip script path.
     """
-    pip_version = packaging_version.parse(get_installed_version('pip'))
+    installed_version = get_installed_version("pip")
+    if installed_version is None:
+        return
+
+    pip_version = packaging_version.parse(installed_version)
     pypi_version = None
 
     try: