[Bug 276831] Re: Thunderbird crashes with "Segmentation Fault", debug log shows "failed creating protocol instance to play queued url", trying to download headers from Dovecot IMAP server

[Earl Ruby]

I did have "Make the messages in my Inbox available when I am working
offline" checked, but I am not out of disk space.

I also narrowed down the problem somewhat.

On the mail server I moved all of my weekend mail out of ~/Maildir/cur
this morning (9000+ messages) into ~/tmpmail, then deleted the
~/Maildir/dovecot* index files.

On my box I fired up Thunderbird and told it to get all new mail. This
rebuilt the ~/Maildir/dovecot* index files on the mail server.

On the mail server I moved 500 messages at a time back to ~/Maildir/cur.

On my box I clicked the Thunderbird Drafts folder, then Inbox, forcing
it to check mail in the Inbox. At the bottom of the screen it would say
"Downloading message header 1 of 500" and it would successfully get all
500 mail headers.

I'd repeat the two steps above. About every 4th or 5th download
Thunderbird would crash. After restarting Thunderbird, rather than
saying "Downloading message header 1 of 500" it would say "Downloading
message header 1 of 501" or "Downloading message header 1 of 502".

In other words, Thunderbird is crashing when new mail arrives on the
mail server while Thunderbird is in the process of downloading IMAP
headers. Something about the fact that the number of messages on the
server changes while Thunderbird is in the middle of downloading IMAP
headers causes Thunderbird to crash.

I can reproduce this error by making new mail show up while Thunderbird
is downloading many message headers.

I will try unchecking "Make the messages in my Inbox available when I am
working offline" and see if the problem still occurs.

-- 
Thunderbird crashes with "Segmentation Fault", debug log shows "failed creating protocol instance to play queued url", trying to download headers from Dovecot IMAP server
https://bugs.launchpad.net/bugs/276831
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