From a02ebdedc945fedb7173edfed5ad4d6f7a04a760 Mon Sep 17 00:00:00 2001
From: Giampaolo Rodola <g.rodola@gmail.com>
Date: Tue, 5 Oct 2021 18:53:42 +0200
Subject: [PATCH] fix #1965 / win / users() / critical: Py_INCREF(Py_None)
 before setting None object in C

Signed-off-by: Giampaolo Rodola <g.rodola@gmail.com>
---
 HISTORY.rst              | 2 ++
 psutil/_psutil_windows.c | 1 +
 2 files changed, 3 insertions(+)

diff --git a/HISTORY.rst b/HISTORY.rst
index adcaaa459..55c6b2b95 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -33,6 +33,8 @@ XXXX-XX-XX
   by Xuehai Pan)
 - 1953_: [Windows] disk_partitions() crashes due to insufficient buffer len.
   (patch by MaWe2019)
+- 1965_: [Windows] fix "Fatal Python error: deallocating None" when calling
+  psutil.users() multiple times.
 - 1991_: process_iter() can raise TypeError if invoked from multiple threads
   (not thread-safe).
 
diff --git a/psutil/_psutil_windows.c b/psutil/_psutil_windows.c
index 13cf58c48..8abd8a8d7 100644
--- a/psutil/_psutil_windows.c
+++ b/psutil/_psutil_windows.c
@@ -1252,6 +1252,7 @@ psutil_users(PyObject *self, PyObject *args) {
                 goto error;
         }
         else {
+            Py_INCREF(Py_None);
             py_address = Py_None;
         }