Issue #13389: Full garbage collection passes now clear the freelists for
list and dict objects.  They already cleared other freelists in the
interpreter.
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index 6c8ca38..154f136 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -762,6 +762,8 @@
     (void)PyTuple_ClearFreeList();
     (void)PyUnicode_ClearFreeList();
     (void)PyFloat_ClearFreeList();
+    (void)PyList_ClearFreeList();
+    (void)PyDict_ClearFreeList();
 }
 
 static double