From a91d9e1084ca87472b952d189eb897dc8a52fec5 Mon Sep 17 00:00:00 2001
From: flashdagger <flashdagger@googlemail.com>
Date: Mon, 13 Nov 2023 07:14:14 +0100
Subject: [PATCH] [parsing] support comment end tag '--!>' as suggested by
 github-advanced-security bot

---
 test/test_parsing.py | 2 +-
 yt_dlp/parsing.py    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/test_parsing.py b/test/test_parsing.py
index 0e006298f..9641df91d 100644
--- a/test/test_parsing.py
+++ b/test/test_parsing.py
@@ -343,7 +343,7 @@ class TestParsing(unittest.TestCase):
         -----------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-----------
         this is a leftover comment -->     <!-- a new comment without closing
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-        here   is   <!-- a comment -->   and   <!-- another comment -->   end
+        here   is   <!-- a comment -->   and   <!-- another comment --!>  end
         ----------------^^^^^^^^^^^----------------^^^^^^^^^^^^^^^^^---------
         <script> ignore here </script>            <SCRIPT> and here </SCRIPT>
         --------^^^^^^^^^^^^^-----------------------------^^^^^^^^^^---------
diff --git a/yt_dlp/parsing.py b/yt_dlp/parsing.py
index f4aaf1ac4..72d7e448b 100644
--- a/yt_dlp/parsing.py
+++ b/yt_dlp/parsing.py
@@ -20,7 +20,7 @@ class HTMLIgnoreRanges:
             if offset in ranges:
                 ...
     """
-    REGEX = re.compile(r'<!--|-->|</?\s*(?:script|style)\b[^>]*>', flags=re.IGNORECASE)
+    REGEX = re.compile(r'<!--|--!?>|</?\s*(?:script|style)\b[^>]*>', flags=re.IGNORECASE)
 
     def __init__(self, html):
         self.html = html
@@ -40,7 +40,7 @@ class HTMLIgnoreRanges:
         if self._last_match is None:
             return False
         match_string = self._last_match.group()
-        if match_string.startswith('</') or match_string == '-->':
+        if match_string.startswith('</') or match_string in ('-->', '--!>'):
             return offset < self._last_match.start()
         return offset >= self._last_match.end()