From f6e61df01536493f1280cd07639c7ff9bffb2cdc Mon Sep 17 00:00:00 2001
From: Oren Milman <orenmn@gmail.com>
Date: Thu, 14 Sep 2017 01:30:05 +0300
Subject: bpo-31418: Fix an assertion failure in PyErr_WriteUnraisable() in
 case of an exception with a bad __module__ attribute. (#3539)

---
 Python/errors.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Python/errors.c')

diff --git a/Python/errors.c b/Python/errors.c
index 3cb6d5306f..5709fddb58 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -961,7 +961,7 @@ PyErr_WriteUnraisable(PyObject *obj)
     }
 
     moduleName = _PyObject_GetAttrId(t, &PyId___module__);
-    if (moduleName == NULL) {
+    if (moduleName == NULL || !PyUnicode_Check(moduleName)) {
         PyErr_Clear();
         if (PyFile_WriteString("<unknown>", f) < 0)
             goto done;
-- 
cgit v1.2.1