[extractor/common] Skip malformed ISM manifest XMLs while extracting …

…ISM formats (#24667)
pareronia · Jun 22, 2020 · 05598a2 · 05598a2
1 parent 8c5ca77
commit 05598a2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
@@ -2340,6 +2340,8 @@ def _extract_ism_formats(self, ism_url, video_id, ism_id=None, note=None, errnot
         if res is False:
             return []
         ism_doc, urlh = res
+        if ism_doc is None:
+            return []
 
         return self._parse_ism_formats(ism_doc, urlh.geturl(), ism_id)