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-rw-r--r--bs4/builder/_html5lib.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/bs4/builder/_html5lib.py b/bs4/builder/_html5lib.py
index 914b1df..58bc176 100644
--- a/bs4/builder/_html5lib.py
+++ b/bs4/builder/_html5lib.py
@@ -8,6 +8,7 @@ __all__ = [
import warnings
import re
from bs4.builder import (
+ DetectsXMLParsedAsHTML,
PERMISSIVE,
HTML,
HTML_5,
@@ -70,6 +71,11 @@ class HTML5TreeBuilder(HTMLTreeBuilder):
# UnicodeDammit.
if exclude_encodings:
warnings.warn("You provided a value for exclude_encoding, but the html5lib tree builder doesn't support exclude_encoding.")
+
+ # html5lib only parses HTML, so if it's given XML that's worth
+ # noting.
+ DetectsXMLParsedAsHTML.warn_if_markup_looks_like_xml(markup)
+
yield (markup, None, None, False)
# These methods are defined by Beautiful Soup.