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-rw-r--r--Objects/tupleobject.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index f8648d2..c0b59c0 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -22,6 +22,12 @@ class tuple "PyTupleObject *" "&PyTuple_Type"
#define PyTuple_MAXFREELIST 2000 /* Maximum number of tuples of each size to save */
#endif
+/* bpo-40521: tuple free lists are shared by all interpreters. */
+#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
+# undef PyTuple_MAXSAVESIZE
+# define PyTuple_MAXSAVESIZE 0
+#endif
+
#if PyTuple_MAXSAVESIZE > 0
/* Entries 1 up to PyTuple_MAXSAVESIZE are free lists, entry 0 is the empty
tuple () of which at most one instance will be allocated.
@@ -248,7 +254,9 @@ tupledealloc(PyTupleObject *op)
#endif
}
Py_TYPE(op)->tp_free((PyObject *)op);
+#if PyTuple_MAXSAVESIZE > 0
done:
+#endif
Py_TRASHCAN_END
}