classification
Title: Infinite recursion in email.message.as_string()
Type: behavior Stage: resolved
Components: email Versions: Python 3.7, Python 3.6
process
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: Silla Rizzoli, barry, r.david.murray
Priority: normal Keywords:

Created on 2017-11-30 14:59 by Silla Rizzoli, last changed 2017-12-04 00:53 by r.david.murray. This issue is now closed.

Messages (5)
msg307319 - (view) Author: Silla Rizzoli (Silla Rizzoli) Date: 2017-11-30 14:59
Sometimes RFC-correct email headers do not get folded correctly; the example code below results in an infinite recursion exception.

import sys
import mailbox
from email.message import EmailMessage
from email.headerregistry import Address
from email import policy

ePol = policy.SMTP.clone(refold_source='long',max_line_length=78)
msg = EmailMessage(ePol)
msg['From'] = Address("abcdefgh ijklnopq","a.ijklnopq","antani.com")
msg['To'] = (Address("abcdef.ghijklmno@pqrstuvwxyz12345678.it","abcdef.ghijklmnop","pqrstuvwxyz12345678.it"), Address("Jane Doe", "jane", "doe.com"))
msg['Subject'] = "Test"
msg.set_content("Body")
finalMail = msg.as_string()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.6/email/message.py", line 968, in as_string
    return super().as_string(maxheaderlen=maxheaderlen, policy=policy)
  File "/usr/lib/python3.6/email/message.py", line 158, in as_string
    g.flatten(self, unixfrom=unixfrom)
  File "/usr/lib/python3.6/email/generator.py", line 116, in flatten
    self._write(msg)
  File "/usr/lib/python3.6/email/generator.py", line 195, in _write
    self._write_headers(msg)
  File "/usr/lib/python3.6/email/generator.py", line 222, in _write_headers
    self.write(self.policy.fold(h, v))
  File "/usr/lib/python3.6/email/policy.py", line 183, in fold
    return self._fold(name, value, refold_binary=True)
  File "/usr/lib/python3.6/email/policy.py", line 205, in _fold
    return value.fold(policy=self)
  File "/usr/lib/python3.6/email/headerregistry.py", line 255, in fold
    return header.fold(policy=policy)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 300, in fold
    self._fold(folded)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 1226, in _fold
    rest._fold(folded)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 338, in _fold
    if folded.append_if_fits(part, tstr):
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 149, in append_if_fits
    token._fold(self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 325, in _fold
    tstr = str(part)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in __str__
    return ''.join(str(x) for x in self)
  File "/usr/lib/python3.6/email/_header_value_parser.py", line 196, in <genexpr>
    return ''.join(str(x) for x in self)
RecursionError: maximum recursion depth exceeded while calling a Python object
msg307325 - (view) Author: R. David Murray (r.david.murray) * (Python committer) Date: 2017-11-30 16:19
This is almost certainly either a duplicate or will be fixed by a PR I have pending, that I don't have time to look for right now, that rewrites the folder.  I'll try to get to merging that PR soonish, but it might not happen before the holidays ;)
msg307386 - (view) Author: Silla Rizzoli (Silla Rizzoli) Date: 2017-12-01 12:52
Ok, thanks!
I'm writing a program to convert Outlook for Mac backup files (.olm) into
plain mbox files as a way to teach myself Python (and at the same time
regain control of my email), so I have tens of thousand of emails to test
your new code on, if you feel you need some fedback before releasing it.

Best regards,
Silla

On Thu, Nov 30, 2017 at 5:19 PM, R. David Murray <report@bugs.python.org>
wrote:

>
> R. David Murray <rdmurray@bitdance.com> added the comment:
>
> This is almost certainly either a duplicate or will be fixed by a PR I
> have pending, that I don't have time to look for right now, that rewrites
> the folder.  I'll try to get to merging that PR soonish, but it might not
> happen before the holidays ;)
>
> ----------
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue32182>
> _______________________________________
>
msg307391 - (view) Author: R. David Murray (r.david.murray) * (Python committer) Date: 2017-12-01 16:25
It is gh-3488 if you want to try it out.  Feedback welcome.
msg307533 - (view) Author: R. David Murray (r.david.murray) * (Python committer) Date: 2017-12-04 00:53
I checked, and your example works correctly with the patch applied.  I've committed the PR.  Let me know if you find any other issues (there are several open issues with exactly how headers are wrapped, but I don't think there are any open where serialization fails completely.)
History
Date User Action Args
2017-12-04 00:53:35r.david.murraysetstatus: open -> closed
versions: + Python 3.7
type: crash -> behavior
messages: + msg307533

resolution: fixed
stage: resolved
2017-12-01 16:25:33r.david.murraysetmessages: + msg307391
2017-12-01 12:52:27Silla Rizzolisetmessages: + msg307386
2017-11-30 16:19:27r.david.murraysetmessages: + msg307325
2017-11-30 14:59:00Silla Rizzolicreate