[dovecot/core] 381d90: imapc: Fix expunges+appends in same session with i...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 381d900a2d0c8a40d53a811c10607e88c9ca378e
      https://github.com/dovecot/core/commit/381d900a2d0c8a40d53a811c10607e88c9ca378e
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2018-04-17 (Tue, 17 Apr 2018)

  Changed paths:
    M src/lib-storage/index/imapc/imapc-mailbox.c

  Log Message:
  -----------
  imapc: Fix expunges+appends in same session with imapc_features=no-msn-updates

Since the EXPUNGEs were ignored, the sequence numbers weren't updated.
When a new mail arrived, the sequence number sent by the remote IMAP server
pointed to existing mails in imapc's mapping. Fix this by changing the
sequence number if the returned UID is >= next_uid.

Fixes "FETCH UID mismatch" errors.