Crash in [@ neqo_transport::path::Path::local_cid]

[KershawChang]

See https://bugzilla.mozilla.org/show_bug.cgi?id=1882863.

The crash is at this line.
It seems the reason is that local_cid is called before make_permanent, but I am not exactly sure how this could happen.

[larseggert]

We need to find better ways to create reproducers from these crash reports. (In general, not just for this one.) What can we do?

[larseggert]

Was fixed by #1698