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Fix: Replace surrogates in Unicode code points #164

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Fix: Replace surrogates in Unicode code points #164

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Fix: Replace surrogates in Unicode code points
Synrom May 7, 2026
0109175
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Synrom May 7, 2026
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2 changes: 1 addition & 1 deletion cssselect/parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -919,7 +919,7 @@ def _compile(pattern: str) -> MatchFunc:

def _replace_unicode(match: re.Match[str]) -> str:
codepoint = int(match.group(1), 16)
if codepoint > sys.maxunicode:
if codepoint > sys.maxunicode or 0xD800 <= codepoint <= 0xDFFF:
codepoint = 0xFFFD
return chr(codepoint)

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1 change: 1 addition & 0 deletions tests/test_cssselect.py
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Expand Up @@ -213,6 +213,7 @@ def test_pseudo_repr(css: str) -> str:
assert parse_one("*") == ("Element[*]", None)
assert parse_one(":empty") == ("Pseudo[Element[*]:empty]", None)
assert parse_one(":scope") == ("Pseudo[Element[*]:scope]", None)
assert parse_one(":\\DDDD") == ("Pseudo[Element[*]:\ufffd]", None)

# Special cases for CSS 2.1 pseudo-elements
assert parse_one(":BEfore") == ("Element[*]", "before")
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