Unescaped " in value produces invalid json when encoded

[SimonSchneider]

coming here from polars:
reference issue: pola-rs/polars#2548

When encoding any value containing " to json will produce invalid json. The " is not escaped correctly. An example is available here pola-rs/polars#2548 (comment) (It comes from polars which I hope is ok, but if needed I can try making a new one for only the arrow2 part)

Some digging lead me here (" is an ascii byte)

arrow2/src/io/json/write/serialize.rs

Line 141 in 9a8edd0

fn utf8_serialize(value: &str, buf: &mut Vec<u8>) {

#[inline]
fn utf8_serialize(value: &str, buf: &mut Vec<u8>) {
    if value.as_bytes().is_ascii() {
        buf.reserve(value.len() + 2);
        buf.push(b'"');
        buf.extend_from_slice(value.as_bytes());
        buf.push(b'"');
    } else {
        // it may contain reserved keywords: perform roundtrip for
        // todo: avoid this roundtrip over serde_json
        serde_json::to_writer(buf, &Value::String(value.to_string())).unwrap();
    }
}