bpo-35717: Fix KeyError exception raised when using enums and compile (GH-11523)

https://bugs.python.org/issue17467

Lib/enum.py

@@ -419,7 +419,7 @@ class EnumMeta(type):
         if module is None:
             try:
                 module = sys._getframe(2).f_globals['__name__']
-            except (AttributeError, ValueError) as exc:
+            except (AttributeError, ValueError, KeyError) as exc:
                 pass
         if module is None:
             _make_class_unpicklable(enum_class)

Lib/test/test_enum.py

@@ -1858,6 +1858,15 @@ class TestEnum(unittest.TestCase):
             REVERT_ALL = "REVERT_ALL"
             RETRY = "RETRY"
 
+    def test_empty_globals(self):
+        # bpo-35717: sys._getframe(2).f_globals['__name__'] fails with KeyError
+        # when using compile and exec because f_globals is empty
+        code = "from enum import Enum; Enum('Animal', 'ANT BEE CAT DOG')"
+        code = compile(code, "<string>", "exec")
+        global_ns = {}
+        local_ls = {}
+        exec(code, global_ns, local_ls)
+
 
 class TestOrder(unittest.TestCase):
 

Misc/ACKS

@@ -906,6 +906,7 @@ Glenn Langford
 Andrew Langmead
 Wolfgang Langner
 Detlef Lannert
+Rémi Lapeyre
 Soren Larsen
 Amos Latteier
 Piers Lauder

Misc/NEWS.d/next/Library/2019-01-11-17-56-15.bpo-35717.6TDTB_.rst

+Fix KeyError exception raised when using enums and compile. Patch
+contributed by Rémi Lapeyre.