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LibWeb: Fix crash parsing an invalid pseudo compound selector
Reduced from a crash on: https://github.com/SerenityOS/serenity/pulls Fixes #20568
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3 changed files with 19 additions and 3 deletions
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@ -635,13 +635,13 @@ Parser::ParseErrorOr<Selector::SimpleSelector> Parser::parse_pseudo_simple_selec
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return parse_nth_child_selector(pseudo_class, pseudo_function.values(), true);
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case PseudoClassMetadata::ParameterType::CompoundSelector: {
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auto function_token_stream = TokenStream(pseudo_function.values());
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auto compound_selector = MUST(parse_compound_selector(function_token_stream));
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if (!compound_selector.has_value()) {
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auto compound_selector_or_error = parse_compound_selector(function_token_stream);
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if (compound_selector_or_error.is_error() || !compound_selector_or_error.value().has_value()) {
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dbgln_if(CSS_PARSER_DEBUG, "Failed to parse :{}() parameter as a compound selector", pseudo_function.name());
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return ParseError::SyntaxError;
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}
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Vector compound_selectors { compound_selector.release_value() };
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Vector compound_selectors { compound_selector_or_error.release_value().release_value() };
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auto selector = Selector::create(move(compound_selectors));
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return Selector::SimpleSelector {
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