Close #19156: add tests and fix for Enum helper edge cases. Patch from CliffM.
diff --git a/Lib/enum.py b/Lib/enum.py
index 921d00c..7ca8503 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -17,14 +17,16 @@
"""Returns True if a __dunder__ name, False otherwise."""
return (name[:2] == name[-2:] == '__' and
name[2:3] != '_' and
- name[-3:-2] != '_')
+ name[-3:-2] != '_' and
+ len(name) > 4)
def _is_sunder(name):
"""Returns True if a _sunder_ name, False otherwise."""
return (name[0] == name[-1] == '_' and
name[1:2] != '_' and
- name[-2:-1] != '_')
+ name[-2:-1] != '_' and
+ len(name) > 2)
def _make_class_unpicklable(cls):