Error message from fastjson::dom::parse_string is always empty.

[mikeando]

Errors might be reported by the parsing code. and spewed to the console, but the actual string that should hold the error message is always empty.

OMG an error [4003] : Unexpected character while parsing array
It seems to have happened here...
}]

^ Unable to parse json :

When trying to parse this json

[{},{}}]