[thaumasiotes]

> But we can *VERIFY* that measures were taken. In fact, easily! We can look at the references at the very top of the bug report!

>> Title: move/copying multiple imap messages to local folder bypasses offline store and redownloads messages. Need to preflight the move/copy.

>> Status: RESOLVED FIXED

This might be a more compelling observation if the bug was related to data loss. This just says "if you have a local copy of something, read from that instead of reading from the remote server".

It addresses the specific observation made in the thread that you can encounter the data loss bug even if you already have local copies of the messages, because Thunderbird ignores those, redownloads from the server, fails, and then deletes everything. Now, if you have local copies, Thunderbird won't try to redownload them from the server and the fact that the data loss bug isn't fixed won't matter to you.

You could apply this same approach to the entire bug, by guarding the "delete all of the user's emails" action instead of the "move emails that already exist locally" action. But they don't.