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email.header.Header.encode() crashes with IndexError on spaces only value #71924

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timgraham mannequin opened this issue Aug 11, 2016 · 4 comments
Closed

email.header.Header.encode() crashes with IndexError on spaces only value #71924

timgraham mannequin opened this issue Aug 11, 2016 · 4 comments
Labels
3.7 (EOL) end of life 3.8 only security fixes stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@timgraham
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timgraham mannequin commented Aug 11, 2016

BPO 27737
Nosy @warsaw, @bitdancer, @timgraham
PRs
  • bpo-27737: Allow whitespace only headers encoding #13478
  • [3.7] bpo-27737: Allow whitespace only headers encoding (GH-13478) #13517
    		•
    Files
  • whitespace-header-test.diff: regression test for cpython's test suite
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2019-05-23.01:17:21.594>
created_at = <Date 2016-08-11.13:51:04.796>
labels = ['3.7', '3.8', 'type-bug', 'library']
title = 'email.header.Header.encode() crashes with IndexError on spaces only value'
updated_at = <Date 2019-05-23.01:41:47.667>
user = 'https://github.com/timgraham'

    bugs.python.org fields:

    activity = <Date 2019-05-23.01:41:47.667>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2019-05-23.01:17:21.594>
closer = 'r.david.murray'
components = ['Library (Lib)']
creation = <Date 2016-08-11.13:51:04.796>
creator = 'Tim.Graham'
dependencies = []
files = ['44077']
hgrepos = []
issue_num = 27737
keywords = ['patch']
message_count = 4.0
messages = ['272447', '343262', '343264', '343269']
nosy_count = 3.0
nosy_names = ['barry', 'r.david.murray', 'Tim.Graham']
pr_nums = ['13478', '13517']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27737'
versions = ['Python 3.7', 'Python 3.8']
    @timgraham
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    timgraham mannequin commented Aug 11, 2016 

    Python 2.7:
>>> from email.header import Header
>>> Header(' ').encode()
''

Python 3.2+ (I didn't check older versions of Python 3):
>>> Header(' ').encode()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/tim/code/cpython/Lib/email/header.py", line 391, in encode
    value = formatter._str(linesep)
  File "/home/tim/code/cpython/Lib/email/header.py", line 427, in _str
    self.newline()
  File "/home/tim/code/cpython/Lib/email/header.py", line 439, in newline
    self._lines[-1] += str(self._current_line)
IndexError: list index out of range

    (Originally reported at https://code.djangoproject.com/ticket/27051)

    @timgraham timgraham mannequin added the stdlib Python modules in the Lib dir label Aug 11, 2016
    @SilentGhost SilentGhost mannequin added the type-bug An unexpected behavior, bug, or error label Aug 11, 2016
    @bitdancer
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    New changeset ef5bb25 by R. David Murray (Batuhan Taşkaya) in branch 'master':
    bpo-27737: Allow whitespace only headers encoding (bpo-13478)
    ef5bb25

    @bitdancer
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    Thanks.

    @bitdancer bitdancer added 3.7 (EOL) end of life 3.8 only security fixes labels May 23, 2019
    @bitdancer
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    New changeset 0416d6f by R. David Murray (Miss Islington (bot)) in branch '3.7':
    bpo-27737: Allow whitespace only headers encoding (GH-13478) (bpo-13517)
    0416d6f

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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