Segfault when using `appender` with Generated Columns

[samuelcolvin]

This may be related to #211, but I'm creating a new issue since:

1. This the cause is somewhat different
2. The SQL/logic here is completely valid, works fine with duckdb CLI

As far as I can tell, any/all generated columns cause appender.append_row to seg fault immediately (I'm running on M1 MacOS, using duckdb = { version = "0.10.1", features = ["bundled"] }).

Minimal reproduction:

fn main() -> Result<(), duckdb::Error> {
    let conn = duckdb::Connection::open_in_memory()?;
    conn.execute_batch(
        r"CREATE TABLE foo (
          foobar TEXT,
          foobar_split TEXT[] AS (split(trim(foobar), ','))
        );",
    )?;
    let mut appender = conn.appender("foo")?;
    appender.append_row(duckdb::params!["foo"])?;
    appender.flush();
    Ok(())
}

Output:

cargo r
    Finished dev [unoptimized + debuginfo] target(s) in 0.25s
     Running `/Users/samuel/code/testing/target/debug/testing`
zsh: segmentation fault  cargo r