From 2b2a9be9135be0135649a2a869856dbe4cc543f1 Mon Sep 17 00:00:00 2001
From: Berker Peksag <berker.peksag@gmail.com>
Date: Thu, 8 Sep 2016 19:40:30 +0300
Subject: [PATCH] Issue #27445: Don't pass str(_charset) to
 MIMEText.set_payload()

Patch by Claude Paroz.
---
 Lib/email/mime/text.py            | 4 +---
 Lib/test/test_email/test_email.py | 5 ++++-
 Misc/NEWS                         | 3 +++
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/Lib/email/mime/text.py b/Lib/email/mime/text.py
index 479928ec945..da03086ee8a 100644
--- a/Lib/email/mime/text.py
+++ b/Lib/email/mime/text.py
@@ -35,10 +35,8 @@ class MIMEText(MIMENonMultipart):
                 _charset = 'us-ascii'
             except UnicodeEncodeError:
                 _charset = 'utf-8'
-        if isinstance(_charset, Charset):
-            _charset = str(_charset)
 
         MIMENonMultipart.__init__(self, 'text', _subtype,
-                                  **{'charset': _charset})
+                                  **{'charset': str(_charset)})
 
         self.set_payload(_text, _charset)
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index 1e5366c2a4e..1d50feb593f 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -1652,9 +1652,12 @@ class TestMIMEText(unittest.TestCase):
         eq(msg.get_charset().input_charset, 'us-ascii')
         eq(msg['content-type'], 'text/plain; charset="us-ascii"')
         # Also accept a Charset instance
-        msg = MIMEText('hello there', _charset=Charset('utf-8'))
+        charset = Charset('utf-8')
+        charset.body_encoding = None
+        msg = MIMEText('hello there', _charset=charset)
         eq(msg.get_charset().input_charset, 'utf-8')
         eq(msg['content-type'], 'text/plain; charset="utf-8"')
+        eq(msg.get_payload(), 'hello there')
 
     def test_7bit_input(self):
         eq = self.assertEqual
diff --git a/Misc/NEWS b/Misc/NEWS
index 15818383c4f..a18ceb674e8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,6 +60,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #27445: Don't pass str(_charset) to MIMEText.set_payload().
+  Patch by Claude Paroz.
+
 - lib2to3.pgen3.driver.load_grammar() now creates a stable cache file
   between runs given the same Grammar.txt input regardless of the hash
   randomization setting.