Function alloc_unsafe_slow

modules/llrt_buffer/src/buffer.rs:172–183

(ctx: Ctx<'_>, size: usize)

    let mut bytes: Vec<MaybeUninit<u8>> = Vec::with_capacity(size);
    unsafe {
        bytes.set_len(size);
    }

    Buffer(maybeuninit_to_u8(bytes)).into_js(&ctx)
}

fn maybeuninit_to_u8(vec: Vec<MaybeUninit<u8>>) -> Vec<u8> {
    let len = vec.len();
    let capacity = vec.capacity();
    let ptr = vec.as_ptr() as *mut u8;

    std::mem::forget(vec);

    // This conversion is safe because MaybeUninit has the same memory layout as u8, meaning the underlying bytes are identical.
    // Since Vec<MaybeUninit> and Vec share the same memory representation, a simple reinterpretation of the pointer is valid.