Issue #6695: Full garbage collection runs now clear the freelist of set objects.
Initial patch by Matthias Troffaes.
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index 154f136..1876e93 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -764,6 +764,7 @@
     (void)PyFloat_ClearFreeList();
     (void)PyList_ClearFreeList();
     (void)PyDict_ClearFreeList();
+    (void)PySet_ClearFreeList();
 }
 
 static double