commit 4cde4bdcc86cb08ee3847500a172cc24eba37ffe
author INADA Naoki <methane@users.noreply.github.com> Mon Sep 04 12:31:41 2017 +0900
committer GitHub <noreply@github.com> Mon Sep 04 12:31:41 2017 +0900
tree cfc4c00f39f0cc6e9fec1e9756cf81c059ff9d6a
parent 990b2d043cdfaafc3378550f7d27259410a6b918

bpo-31095: Fix potential crash during GC (GH-3197)

(cherry picked from commit a6296d34a478b4f697ea9db798146195075d496c)

Modules/_functoolsmodule.c

diff --git a/Modules/_functoolsmodule.c b/Modules/_functoolsmodule.c
index e0781a9..e9e8933 100644
--- a/Modules/_functoolsmodule.c
+++ b/Modules/_functoolsmodule.c
@@ -143,6 +143,7 @@
 static void
 partial_dealloc(partialobject *pto)
 {
+    /* bpo-31095: UnTrack is needed before calling any callbacks */
     PyObject_GC_UnTrack(pto);
     if (pto->weakreflist != NULL)
         PyObject_ClearWeakRefs((PyObject *) pto);