From 418fd74f87756c4312db496db92118bba2c4484a Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@python.org>
Date: Sun, 19 Apr 2015 21:08:42 +0200
Subject: [PATCH] Issue #23998: PyImport_ReInitLock() now checks for lock
 allocation error

---
 Misc/NEWS       | 5 +++++
 Python/import.c | 6 +++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Misc/NEWS b/Misc/NEWS
index ae04f59ac24..83666278a8d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -32,6 +32,11 @@ Library
 - Issue #23365: Fixed possible integer overflow in
   itertools.combinations_with_replacement.
 
+C API
+-----
+
+- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error
+
 
 What's New in Python 3.3.6?
 ===========================
diff --git a/Python/import.c b/Python/import.c
index 26f82cf29b4..b0b2405ab8b 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -199,8 +199,12 @@ _PyImport_ReleaseLock(void)
 void
 _PyImport_ReInitLock(void)
 {
-    if (import_lock != NULL)
+    if (import_lock != NULL) {
         import_lock = PyThread_allocate_lock();
+        if (import_lock == NULL) {
+            Py_FatalError("PyImport_ReInitLock failed to create a new lock");
+        }
+    }
     if (import_lock_level > 1) {
         /* Forked as a side effect of import */
         long me = PyThread_get_thread_ident();