[Dovecot] Copy from INBOX to INBOX corrupts file

Aloha, again, Timo.

Concerning the problem of copying within one folder...

I'm still not sure it's not a problem I created myself, but I think it's caused by the use of the buffered IO routines in ostream-file.c ... you use io_add() to schedule write operations for later while simultanously reading new chunks from the very same file. This seems to confuse dovecot and make it write the copy to the strangest locations. I think when working within one folder I should use either blocking IO or a lot of calls to o_stream_flush()... what do you think?

Greetings, Andy