Timo Sirainen <tss@iki.fi> writes:

...

Any guess at what would cause this?

Feb 7 21:20:53 server dovecot: imap(user): Panic: file mailbox-list-fs-iter.c: line 447 (fs_list_get_roots): assertion failed: (full_fs_access)

LIST command that had invalid parameters that somehow got through the first validity check. What namespace config do you have?

I got more info from the user that had this problem. He reported that he was was setting up a new Email client (Nexus4 Android) and he sent me a screenshot of his setup. Everything look ordinary except perhaps the IMAP prefix set to "mail". My setup documents inform users to leave it blank, but sometimes they use "mail/", a holdover from the uw-imapd days. I provide some aliases for that, but I don't know what would happen if you leave off the trailing "/".

My namespace settings as reported by dovecot -n:

namespace {
  inbox = yes
  location =
  prefix =
  separator = /
}

(The following are aliases to keep backward compatibility)
namespace {
  alias_for =
  hidden = yes
  list = no
  location =
  prefix = /
  separator = /
}
namespace {
  alias_for =
  hidden = yes
  list = no
  location =
  prefix = mail/
  separator = /
}
namespace {
  alias_for =
  hidden = yes
  list = no
  location =
  prefix = ~/mail/
  separator = /
}
namespace {
  alias_for =
  hidden = yes
  list = no
  location =
  prefix = ~%u/mail/
  separator = /
}

I've asked the user to change his prefix, and he'll probably report back.

Joseph Tam <jtam.home@gmail.com>