`AttributeError` in `email._header_value_parser.get_address`

[gabe-sherman]

Bug report

Bug description:

During fuzzing of Python standard libraries, the following code snippet causes an AttributeError with the following message: AttributeError: 'InvalidHeaderDefect' object has no attribute 'all_defects'. This occurs in the all_defects function at line 140 in email/_header_value_parser.py.

import email._header_value_parser
email._header_value_parser.get_address("!an??:=m==fr2@[C")

Exception Trace

Traceback (most recent call last):
  File "rep.py", line 3, in <module>
    email._header_value_parser.get_address("!an??:=m==fr2@[C")
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 1988, in get_address
    token, value = get_group(value)
                   ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 1954, in get_group
    token, value = get_group_list(value)
                   ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 1926, in get_group_list
    token, value = get_mailbox_list(value)
                   ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 1860, in get_mailbox_list
    token, value = get_mailbox(value)
                   ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 1822, in get_mailbox
    for x in token.all_defects):
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in all_defects
    return sum((x.all_defects for x in self), self.defects)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in <genexpr>
    return sum((x.all_defects for x in self), self.defects)
                ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in all_defects
    return sum((x.all_defects for x in self), self.defects)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in <genexpr>
    return sum((x.all_defects for x in self), self.defects)
                ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in all_defects
    return sum((x.all_defects for x in self), self.defects)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/email/_header_value_parser.py", line 140, in <genexpr>
    return sum((x.all_defects for x in self), self.defects)
                ^^^^^^^^^^^^^
AttributeError: 'InvalidHeaderDefect' object has no attribute 'all_defects'

CPython versions tested on:

3.12, 3.11, 3.10, 3.9

Operating systems tested on:

Linux

Linked PRs

• gh-134155: fix AttributeError in email._header_value_parser.get_address #134194
• [3.14] gh-134155: fix AttributeError in email._header_value_parser.get_address (GH-134194) #135191
• [3.13] gh-134155: fix AttributeError in email._header_value_parser.get_address (GH-134194) #135192

[bitdancer]

This will be fixed by #134194.