Function run_with_context 

pub fn run_with_context(
    reader: impl Read,
    writer: impl Write,
    stderr: &mut dyn Write,
    items: &[LineItem],
    ctx: &RunContext<'_>,
) -> Result<()>

Full-control entry with injected stderr and explicit run context. Parse failures render a ? marker to writer; only stdin/stdout I/O failures surface as errors.

Errors

Returns an io::Error if reading from reader or writing to writer fails. Stderr write failures are swallowed (a broken stderr pipe must not abort a valid stdout render).