Function sanitizeLogAttributes

packages/core/src/logs/internal.ts:235–246

* Sanitizes serialized log attributes by replacing lone surrogates in both * keys and string values with U+FFFD.

(attributes: Attributes)

 * keys and string values with U+FFFD.
 */
function sanitizeLogAttributes(attributes: Attributes): Attributes {
  const sanitized: Attributes = {};
  for (const [key, attr] of Object.entries(attributes)) {
    const sanitizedKey = _removeLoneSurrogates(key);
    if (attr.type === 'string') {
      sanitized[sanitizedKey] = { ...attr, value: _removeLoneSurrogates(attr.value) };
    } else {
      sanitized[sanitizedKey] = attr;
    }
  }
  return sanitized;
}

/**
 * Replaces unpaired UTF-16 surrogates with U+FFFD (replacement character).