#27051: Exception when using a single space character as e-mail subject
-----------------------------+---------------------------------
Reporter: MoritzS | Owner: nobody
Type: Bug | Status: new
Component: Core (Mail) | Version: master
Severity: Normal | Keywords: mail subject header
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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Steps to reproduce:
{{{
Python 3.5.2 (default, Jun 28 2016, 08:46:01)
[GCC 6.1.1 20160602] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import django.conf
>>> django.conf.settings.configure()
>>> from django.core import mail
>>> mail.EmailMessage(subject=' ',
from_email='[email protected]').message()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/user/django/django/core/mail/message.py", line 311, in
message
msg['Subject'] = self.subject
File "/home/user/django/django/core/mail/message.py", line 236, in
__setitem__
name, val = forbid_multi_line_headers(name, val, self.encoding)
File "/home/user/django/django/core/mail/message.py", line 102, in
forbid_multi_line_headers
val = Header(val).encode()
File "/usr/lib/python3.5/email/header.py", line 387, in encode
value = formatter._str(linesep)
File "/usr/lib/python3.5/email/header.py", line 423, in _str
self.newline()
File "/usr/lib/python3.5/email/header.py", line 435, in newline
self._lines[-1] += str(self._current_line)
IndexError: list index out of range
}}}
This error doesn't occur when directly setting `msg['Subject'] = ' '` on a
plain `email.message.Message`. Using subjects like `' foo'` or `'foo '`
also works.
It might still be a bug in Python, though, as the Exception isn't raised
in Django's code but in the `email` module while trying to encode the
Subject header.
--
Ticket URL: <https://code.djangoproject.com/ticket/27051>
Django <https://code.djangoproject.com/>
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