[issue1545463] New-style classes fail to cleanup attributes
Alexander Belopolsky
report at bugs.python.org
Tue Nov 11 06:23:55 CET 2008
Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:
amaury> What if PyGC_Collect() is called just before?
That would work. With the following patch:
===================================================================
--- Python/import.c (revision 67183)
+++ Python/import.c (working copy)
@@ -498,7 +498,10 @@
PyDict_SetItem(modules, key, Py_None);
}
}
-
+ /* Collect garbage remaining after deleting the
+ modules. Mostly reference cycles created by new style
+ classes. */
+ PyGC_Collect();
/* Next, delete sys and __builtin__ (in that order) */
value = PyDict_GetItemString(modules, "sys");
if (value != NULL && PyModule_Check(value)) {
$ ./python.exe x.py
creating X('new')
creating X('old')
deleting X('old')
deleting X('new')
----------
keywords: +patch
Added file: http://bugs.python.org/file11983/gc-import.patch
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