message: Disable exceptions when parsing the options string
diff: @@ -365,7 +365,7 @@ bool CjsonFormat::write(std::ostream& file, const Molecule& molecule)
  {
  json opts;
  if (!options().empty())
  - opts = json::parse(options());
  + opts = json::parse(options(), nullptr, false);
  else
  opts = json::object();
  