Prevent a crash with nested scopes, again caused by calling Py_DECREF when the pointer
is still present in the containing structure.
diff --git a/Lib/test/test_scope.py b/Lib/test/test_scope.py
index db88dbd..cd2d98c 100644
--- a/Lib/test/test_scope.py
+++ b/Lib/test/test_scope.py
@@ -597,6 +597,24 @@
f(4)()
+ def testFreeingCell(self):
+ # Test what happens when a finalizer accesses
+ # the cell where the object was stored.
+ class Special:
+ def __del__(self):
+ nestedcell_get()
+
+ def f():
+ global nestedcell_get
+ def nestedcell_get():
+ return c
+
+ c = (Special(),)
+ c = 2
+
+ f() # used to crash the interpreter...
+
+
def test_main():
run_unittest(ScopeTests)