Error while migrating mailbox with 'doveadm sync'

Zhang Huangbin zhb at
Sun Dec 18 12:42:18 UTC 2016

> On Dec 18, 2016, at 8:26 PM, Zhang Huangbin <zhb at> wrote:
> # doveadm -o mail_fsync=never sync -1 -R -s '' -u user at imapc:
> dsync(user at Panic: file mailbox-alias-plugin.c: line 77 (mailbox_symlink_exists): assertion failed: (ret > 0)
> Abort trap

Checked IMAP folders on old server, this user has ‘.Sent’ and ‘.Sent Messages’ on old server, but ‘.Sent Message’ is configured to be a alias mailbox on new server. After merge 2 folders, then sync works fine.

Sorry about the noise.

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