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-rwxr-xr-xsetuptools/package_index.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/setuptools/package_index.py b/setuptools/package_index.py
index b7c71f23..35cd04a6 100755
--- a/setuptools/package_index.py
+++ b/setuptools/package_index.py
@@ -250,7 +250,7 @@ class PackageIndex(Environment):
"scan is required.", url
)
- def scan_all(self, msg, *args):
+ def scan_all(self, msg=None, *args):
if self.index_url not in self.fetched_urls:
if msg: self.warn(msg,*args)
self.warn(