Show case: reference cycles involving only the ob_type field are rather

uncommon but possible. Inspired by SF bug 1469629.
2006-04-14 14:58:30 +00:00 · 2006-04-14 14:58:30 +00:00 · 969ef7501c
parent db4018f320
commit 969ef7501c
1 changed files with 13 additions and 0 deletions
--- a/Lib/test/leakers/test_selftype.py
+++ b/Lib/test/leakers/test_selftype.py
@ -0,0 +1,13 @@
+# Reference cycles involving only the ob_type field are rather uncommon
+# but possible.  Inspired by SF bug 1469629.
+
+import gc
+
+def leak():
+    class T(type):
+        pass
+    class U(type):
+        __metaclass__ = T
+    U.__class__ = U
+    del U
+    gc.collect(); gc.collect(); gc.collect()