[Dovecot] unusual dsync lines

[Anand Kumria]

Hi,

Another day, another dysnc attempt. Using Dovecot v2.2.5.4; I see:

# doveadm -v -o imapc_user=user at example.com -o imapc_password=password -o
imapc_host=imap.example.com -o imapc_port=993 -o imapc_ssl=imaps -o
imapc_ssl_dir=/etc/ssl -o imapc_feature=rfc822.size -o imapc_ssl_verify=no
sync -1 -R -u user at example.com imapc:
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8343,
msgid=<4F387A25.5010900 at example.com>, size=2954969
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8344,
msgid=<5237B0BF.7030402 at example.com>, size=3371710
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8345,
msgid=<5237B588.6040009 at example.com>, size=3266
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8346,
msgid=<5237B6B4.2030203 at example.com>, size=4201
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8347,
msgid=<5237B888.7030807 at example.com>, size=3371445
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8348,
msgid=<5237C224.9010608 at example.com>, size=3371745
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8349,
msgid=<5237C350.5080608 at example.com>, size=3371700
dsync(user at example.com): Info: copy from Drafts: box=Drafts, uid=8350,
msgid=<5237C5EE.5030408 at example.com>, size=3371619
dsync(user at example.com): Info: expunge: box=Drafts, uid=8209, msgid=<
4F387A25.5010900 at example.com>, size=2954969

The interesting lines being uid=8209 and uid=8343; why would dsync both
copy and then expunge the same message from the same mailbox?

Regards,
Anand