[dovecot/core] 59a82d: mdbox: Fix assert-crash caused by race condition w...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 59a82d4b3adeef388aa66435e3fe9d9a37290c1b
      https://github.com/dovecot/core/commit/59a82d4b3adeef388aa66435e3fe9d9a37290c1b
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-10-31 (Mon, 31 Oct 2016)

  Changed paths:
    M src/lib-storage/index/dbox-multi/mdbox-map.c

  Log Message:
  -----------
  mdbox: Fix assert-crash caused by race condition with multiple doveadm purges.

This fixes a problem where an email that was just written to a new m.* file gets
expunged and purged by another process.

Fixes:
Panic: file mdbox-map.c: line 1359: unreached