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-rw-r--r--setuptools/dist.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/setuptools/dist.py b/setuptools/dist.py
index c31020f0..6ae3886b 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -292,7 +292,7 @@ def check_specifier(dist, attr, value):
"""Verify that value is a valid version specifier"""
try:
packaging.specifiers.SpecifierSet(value)
- except packaging.specifiers.InvalidSpecifier as error:
+ except (packaging.specifiers.InvalidSpecifier, AttributeError) as error:
tmpl = (
"{attr!r} must be a string "
"containing valid version specifiers; {error}"