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LibPDF: Reject non-hexdigits in hex string with error
...instead of VERIFY()ing input data. I haven't seen this in the wild, but since I'm here anyways, might as well fix this.
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@ -380,7 +380,9 @@ PDFErrorOr<DeprecatedString> Parser::parse_hex_string()
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builder.append(static_cast<char>(hex_value));
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return builder.to_deprecated_string();
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}
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VERIFY(isxdigit(ch));
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if (!isxdigit(ch))
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return error("character in hex string isn't hex digit");
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hex_value *= 16;
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if (ch <= '9') {
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