gh-93010: InvalidHeaderError used but nonexistent (GH-93015)

* fix issue 93010

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
(cherry picked from commit 71abeb0895f7563dc5ac4b4f077a8f87dab57e7a)

Co-authored-by: oda-gitso <105083118+oda-gitso@users.noreply.github.com>

1 files changed, 14 insertions, 8 deletions

diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index af0ea03fed..3a5663ac01 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -18,24 +18,25 @@ import email
 import email.policy
 
 from email.charset import Charset
-from email.header import Header, decode_header, make_header
-from email.parser import Parser, HeaderParser
 from email.generator import Generator, DecodedGenerator, BytesGenerator
+from email.header import Header, decode_header, make_header
+from email.headerregistry import HeaderRegistry
 from email.message import Message
 from email.mime.application import MIMEApplication
 from email.mime.audio import MIMEAudio
-from email.mime.text import MIMEText
-from email.mime.image import MIMEImage
 from email.mime.base import MIMEBase
+from email.mime.image import MIMEImage
 from email.mime.message import MIMEMessage
 from email.mime.multipart import MIMEMultipart
 from email.mime.nonmultipart import MIMENonMultipart
-from email import utils
-from email import errors
+from email.mime.text import MIMEText
+from email.parser import Parser, HeaderParser
+from email import base64mime
 from email import encoders
+from email import errors
 from email import iterators
-from email import base64mime
 from email import quoprimime
+from email import utils
 
 from test.support import threading_helper
 from test.support.os_helper import unlink
@@ -5508,7 +5509,12 @@ class TestSigned(TestEmailBase):
         result = fp.getvalue()
         self._signed_parts_eq(original, result)
 
-
+class TestHeaderRegistry(TestEmailBase):
+    # See issue gh-93010.
+    def test_HeaderRegistry(self):
+        reg = HeaderRegistry()
+        a = reg('Content-Disposition', 'attachment; 0*00="foo"')
+        self.assertIsInstance(a.defects[0], errors.InvalidHeaderDefect)
 
 if __name__ == '__main__':
     unittest.main()