diff -r 04d3d67ef5ac Lib/email/parser.py
--- a/Lib/email/parser.py	Fri May 30 11:21:14 2014 -0400
+++ b/Lib/email/parser.py	Fri May 30 23:15:13 2014 +0700
@@ -106,8 +106,9 @@
         meaning it parses the entire contents of the file.
         """
         fp = TextIOWrapper(fp, encoding='ascii', errors='surrogateescape')
-        with fp:
-            return self.parser.parse(fp, headersonly)
+        parsed_data = self.parser.parse(fp, headersonly)
+        fp.detach()
+        return parsed_data
 
 
     def parsebytes(self, text, headersonly=False):
diff -r 04d3d67ef5ac Lib/test/test_email/test_email.py
--- a/Lib/test/test_email/test_email.py	Fri May 30 11:21:14 2014 -0400
+++ b/Lib/test/test_email/test_email.py	Fri May 30 23:15:13 2014 +0700
@@ -3390,6 +3390,18 @@
         self.assertIsInstance(msg.get_payload(), str)
         self.assertIsInstance(msg.get_payload(decode=True), bytes)
 
+    def test_bytes_parser_not_close_file(self):
+        fp = openfile('msg_02.txt', 'rb')
+        self.addCleanup(fp.close)
+        email.parser.BytesParser().parse(fp)
+        self.assertFalse(fp.closed)
+
+    def test_parser_not_close_file(self):
+        fp = openfile('msg_02.txt', 'r')
+        self.addCleanup(fp.close)
+        email.parser.Parser().parse(fp)
+        self.assertFalse(fp.closed)
+
     def test_whitespace_continuation(self):
         eq = self.assertEqual
         # This message contains a line after the Subject: header that has only