diff options
| -rw-r--r-- | pkg_resources.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pkg_resources.py b/pkg_resources.py index de50c4b0..511068a6 100644 --- a/pkg_resources.py +++ b/pkg_resources.py @@ -628,7 +628,7 @@ class WorkingSet(object): if dist not in req: # Oops, the "best" so far conflicts with a dependency tmpl = "%s is installed but %s is required by %s" - args = dist, req, list(required_by.get(req)) + args = dist, req, list(required_by.get(req, [])) raise VersionConflict(tmpl % args) # push the new requirements onto the stack |