[New-bugs-announce] [issue39073] email regression in 3.8: folding

[Jasper Spaans]

New submission from Jasper Spaans <jasper at startmail.com>:

big-bob:t spaans$ cat fak.py
import sys

from email.message import EmailMessage
from email.policy import SMTP
from email.headerregistry import Address

msg = EmailMessage(policy=SMTP)

a = Address(display_name='Extra Extra Read All About It This Line Does Not Fit In 80 Characters So Should Be Wrapped <dev at local>\r\nX:', addr_spec='evil at local')
msg['To'] = a
print(sys.version)
print(msg.as_string())
big-bob:t spaans$ python3.5 fak.py
3.5.2 (default, Jul 16 2019, 13:40:43) 
[GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.46.4)]
To: "Extra Extra Read All About It This Line Does Not Fit In 80 Characters So Should Be Wrapped <dev at local>
X:" <evil at local>


big-bob:t spaans$ python3.8 fak.py
3.8.0 (default, Dec 17 2019, 13:32:18) 
[Clang 11.0.0 (clang-1100.0.33.16)]
To: Extra Extra Read All About It This Line Does Not Fit In 80 Characters So
 Should Be Wrapped <dev at local>
X: <evil at local>

----------
components: email
messages: 358544
nosy: barry, jap, r.david.murray
priority: normal
severity: normal
status: open
title: email regression in 3.8: folding
type: security
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39073>
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