From 8dd49fe09fc4ac3b527914a0703c0dc0429aa125 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 2 Jun 2014 21:36:59 +0200
Subject: Issue #21639: Add a test to check that PyMem_Malloc(0) with
 tracemalloc enabled does not crash.

---
 Lib/test/test_tracemalloc.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Lib/test/test_tracemalloc.py b/Lib/test/test_tracemalloc.py
index c953885..33b0dc2 100644
--- a/Lib/test/test_tracemalloc.py
+++ b/Lib/test/test_tracemalloc.py
@@ -807,6 +807,12 @@ class TestCommandLine(unittest.TestCase):
                                   b'number of frames',
                                   stderr)
 
+    def test_pymem_alloc0(self):
+        # Issue #21639: Check that PyMem_Malloc(0) with tracemalloc enabled
+        # does not crash.
+        code = 'import _testcapi; _testcapi.test_pymem_alloc0(); 1'
+        assert_python_ok('-X', 'tracemalloc', '-c', code)
+
 
 def test_main():
     support.run_unittest(
-- 
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