From af46eb8d5f23c6f4e69a6a1f579fac8c2250b7c2 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 5 Sep 2017 23:30:16 +0200
Subject: _pickle: Fix whichmodule() (#3358)

_PyUnicode_FromId() can return NULL: replace Py_INCREF() with
Py_XINCREF().

Fix coverity report: CID 1417269.
---
 Modules/_pickle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 2a3e739..2525536 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -1705,7 +1705,7 @@ whichmodule(PyObject *global, PyObject *dotted_path)
 
     /* If no module is found, use __main__. */
     module_name = _PyUnicode_FromId(&PyId___main__);
-    Py_INCREF(module_name);
+    Py_XINCREF(module_name);
     return module_name;
 }
 
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