Code review comment for lp:~mir-team/mir/handle-mis-shaped-cookies

Yes! It would, which is why it wouldnt be supported, but our main use case is sending Empty cookies. This case would fail if we created cookies that were to large for our internal storage but that internal storage *should* hopefully go away when i finish going to captnproto in the input layer so its a vector all the way.

For now its safer to handle with out crashing!