From a6cd0cf0f5530f1e96114927b2824f6dc61f1bbd Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@haypocalc.com>
Date: Mon, 2 May 2011 01:05:37 +0200
Subject: Issue #11277: mmap calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get
 around a mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.

---
 Lib/test/test_zlib.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Lib/test/test_zlib.py')

diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index 48ac40a4f7..7593c064b0 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -74,7 +74,7 @@ class ChecksumBigBufferTestCase(unittest.TestCase):
         with open(support.TESTFN, "wb+") as f:
             f.seek(_4G)
             f.write(b"asdf")
-        with open(support.TESTFN, "rb") as f:
+            f.flush()
             self.mapping = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
 
     def tearDown(self):
-- 
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