Sounds obvious, but I didn't even realize that you can put non-string
keys in type dictionaries without using this locals() hack.
diff --git a/Lib/test/crashers/loosing_mro_ref.py b/Lib/test/crashers/loosing_mro_ref.py
index f0b8047..b5fa93b 100644
--- a/Lib/test/crashers/loosing_mro_ref.py
+++ b/Lib/test/crashers/loosing_mro_ref.py
@@ -27,10 +27,9 @@
class Base2(object):
mykey = 'from Base2'
-class X(Base):
- # you can't add a non-string key to X.__dict__, but it can be
- # there from the beginning :-)
- locals()[MyKey()] = 5
+# you can't add a non-string key to X.__dict__, but it can be
+# there from the beginning :-)
+X = type('X', (Base,), {MyKey(): 5})
print X.mykey
# I get a segfault, or a slightly wrong assertion error in a debug build.