Function thread_i32_target

src/lower2/optimise2.rs:1467–1477

(instructions: &[Instruction], target: i32)

            .get(old)
            .and_then(|mapped| *mapped)
            .and_then(|mapped| u16::try_from(mapped).ok())
            .ok_or_else(|| jvm::Error::VerificationError {
                context: "optimise2".to_string(),
                message: format!("Removed or invalid exception boundary {old}"),
            })
    };
    let map_end_boundary = |old: u16| -> jvm::Result<u16> {
        let old = usize::from(old);
        let mapped = old_to_new
            .iter()
            .skip(old)
            .find_map(|mapped| *mapped)
            .unwrap_or(next_index);
        u16::try_from(mapped).map_err(|_| jvm::Error::VerificationError {