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-rw-r--r--Lib/importlib/__init__.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/importlib/__init__.py b/Lib/importlib/__init__.py
index 22c90f24a7..d07f02ed74 100644
--- a/Lib/importlib/__init__.py
+++ b/Lib/importlib/__init__.py
@@ -68,6 +68,8 @@ def find_loader(name, path=None):
return loader
except KeyError:
pass
+ except AttributeError:
+ raise ValueError('{}.__loader__ is not set'.format(name))
return _bootstrap._find_module(name, path)