diff -r 5738c611ff2a Lib/test/test_subprocess.py
--- a/Lib/test/test_subprocess.py	Sat Mar 05 20:31:42 2011 +0100
+++ b/Lib/test/test_subprocess.py	Sat Mar 05 16:16:39 2011 -0800
@@ -119,6 +119,15 @@
 env=newenv)
 self.assertEqual(rc, 1)
 
+ def test_stdout_large(self):
+ # see: issue #11395
+ p = subprocess.Popen([sys.executable, "-c",
+ "print(b'a' * 66000)"],
+ stderr=subprocess.PIPE)
+ self.addCleanup(p.stderr.close)
+ p.wait()
+ self.assertEqual(p.returncode, 0)
+
 def test_stdin_none(self):
 # .stdin is None when not redirected
 p = subprocess.Popen([sys.executable, "-c", 'print("banana")'],
diff -r 5738c611ff2a Modules/_io/fileio.c
--- a/Modules/_io/fileio.c	Sat Mar 05 20:31:42 2011 +0100
+++ b/Modules/_io/fileio.c	Sat Mar 05 16:16:39 2011 -0800
@@ -712,6 +712,9 @@
 errno = 0;
 len = pbuf.len;
 #if defined(MS_WIN64) || defined(MS_WINDOWS)
+ /* See: issue #11395 */
+ if (len> 32000 && isatty(self->fd))
+ len = 32000;
 if (len> INT_MAX)
 len = INT_MAX;
 n = write(self->fd, pbuf.buf, (int)len);
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://bugs.python.org/file21012/wconsole_large.patch">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://bugs.python.org/file21012/wconsole_large.patch" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>