(gdb) bt full
#0  0x7fa1ce38 in _private_close () from /usr/lib/libc.so.1
No symbol table info available.
#1  0x7f965fe0 in close () from /usr/lib/libaio.so.1
No symbol table info available.
#2  0x7cdc0 in file_dotlock_create (set=0x1,
    path=0xdd2a0 "/home4/bhowell/Mail/Inbox.inbtest", flags=0,
    dotlock_r=0xdd230) at file-dotlock.c:514
        dotlock = (struct dotlock *) 0xeaf58
        lock_path = 0x10d7d0 "/home4/bhowell/Mail/Inbox.inbtest.lock"
        st = {st_dev = 0, st_pad1 = {5594600, 33152, 1},
  st_ino = 216350387601509, st_mode = 0, st_nlink = 0, st_uid = 0, st_gid = 0,
  st_rdev = 0, st_pad2 = {-4263120, 0}, st_size = 0, st_atim = {tv_sec = 0,
    tv_nsec = 0}, st_mtim = {tv_sec = 16, tv_nsec = 34}, st_ctim = {
    tv_sec = 34, tv_nsec = -4263504}, st_blksize = 136192,
  st_blocks = -18312022562992632,
  st_fstype = "\000\000\000\000\000\000\000\020\000\000\000\000\000\000\000",
  st_pad4 = {0, 0, 0, 0, 173, 0, 2141451620, 0}}
        fd = 18
        ret = 1
#3  0x38bc8 in mbox_lock_dotlock (ctx=0xffbef2c0, lock_type=2,
    max_wait_time=1169749509) at mbox-lock.c:259
        mbox = (struct mbox_mailbox *) 0xdd100
        set = {temp_prefix = 0x0, lock_suffix = 0x0, timeout = 300,
  stale_timeout = 120, callback = 0x38a04 <dotlock_callback>,
  context = 0xffbef2c0, use_excl_lock = 0}
        ret = 1
#4  0x38fe0 in mbox_lock_list (ctx=0xffbef2c0, lock_type=2,
    max_wait_time=1169749509, idx=1) at mbox-lock.c:448
        lock_types = (enum mbox_lock_type *) 0xaedf0
        i = 1
        ret = -4263232
#5  0x390a0 in mbox_update_locking (mbox=0xdd100, lock_type=-4263232)
    at mbox-lock.c:492
        ctx = {mbox = 0xdd100, lock_status = {1, 0, 0, 0},
  checked_file = false, lock_type = 2, dotlock_last_stale = true}
        max_wait_time = -4263232
        ret = 905472
        i = 1169749509
        drop_locks = false
#6  0x3932c in mbox_lock (mbox=0xdd100, lock_type=2, lock_id_r=0xffbef3ec)
    at mbox-lock.c:534
        ret = 905472
#7  0x3ef14 in mbox_sync (mbox=0xdd100, flags=44) at mbox-sync.c:1642
        lock_type = 2
        index_sync_ctx = (struct mail_index_sync_ctx *) 0x156e1302
        sync_view = (struct mail_index_view *) 0x395c0
        sync_ctx = {mbox = 0xe4234234, flags = 0, input = 0x0,
  file_input = 0x0, write_fd = 0, index_sync_ctx = 0x0, sync_view = 0xdd100,
  t = 0x1, hdr = 0x0, header = 0x1, from_line = 0x1, base_uid_validity = 0,
  base_uid_last = 3, base_uid_last_offset = 0, mails = {buffer = 0x0,
    element_size = 0}, syncs = {buffer = 0xdd100, element_size = 0},
  sync_rec = {uid1 = 1, uid2 = 4, type = 4290704368, add_flags = 0 '\000',
    remove_flags = 0 '\000', keyword_idx = 0}, mail_keyword_pool = 0x0,
  saved_keywords_pool = 0xdf570, prev_msg_uid = 913752, next_uid = 1,
  idx_next_uid = 4290704655, prev_next_uid = 4290704776,
  need_space_next_uid = 1, seq = 4290704552, idx_seq = 235160,
  need_space_seq = 0, expunged_space = 0, space_diff = 0, dest_first_mail = 0,
  first_mail_crlf_expunged = 0, delay_writes = 1}
        seq = 900784
        offset = 8585671828
        lock_id = 0
        ret = 905472
        changed = 1
#8  0x396f8 in mbox_mail_seek (mail=0xdf570) at mbox-mail.c:47
        t = (struct mbox_transaction_context *) 0xdbeb0
        mbox = (struct mbox_mailbox *) 0xdd100
        sync_flags = 44
        ret = 905472
        deleted = false
#9  0x39798 in mbox_mail_get_received_date (_mail=0xdf570) at mbox-mail.c:100
        data = (struct index_mail_data *) 0xdf5d8
        mbox = (struct mbox_mailbox *) 0xdd100
        t = 938304
#10 0x6b800 in mail_get_received_date (mail=0xdf570) at mail.c:54
No locals.
#11 0x24b50 in fetch_internaldate (ctx=0xd5760, mail=0xdf570, context=0x0)
    at imap-fetch.c:518
        time = 6
#12 0x24334 in imap_fetch (ctx=0xd5760) at imap-fetch.c:291
        handlers = (struct imap_fetch_context_handler *) 0xd5880
        count = 4
        ret = 874592
#13 0x1f188 in cmd_fetch (cmd=0xcfeec) at cmd-fetch.c:163
        client = (struct client *) 0xcfea8
        ctx = (struct imap_fetch_context *) 0xd5760
        args = (struct imap_arg *) 0xd3718
        search_arg = (struct mail_search_arg *) 0xd5728
        messageset = 0xd5760 ""
        ret = 874336
#14 0x21eec in cmd_uid (cmd=0xcfeec) at cmd-uid.c:19
        cmd_name = 0xd37c8 "FETCH"
#15 0x22ab8 in client_handle_input (cmd=0xcfeec) at client.c:331
        client = (struct client *) 0xcfea8
#16 0x22a3c in client_handle_input (cmd=0xcfeec) at client.c:388
        client = (struct client *) 0xcfea8
#17 0x22bb0 in _client_input (context=0xcfea8) at client.c:428
        client = (struct client *) 0xcfea8
        cmd = (struct client_command_context *) 0xcfeec
        ret = 715776
#18 0x80e58 in io_loop_handler_run (ioloop=0xcfe78) at ioloop-poll.c:199
        ctx = (struct ioloop_handler_context *) 0xb8f20
        pollfd = (struct pollfd *) 0x2
        tv = {tv_sec = 0, tv_usec = 421865}
        io = (struct io *) 0xb9248
        t_id = 2
        msecs = 0
        ret = 0
        call = true
#19 0x80764 in io_loop_run (ioloop=0xcfe78) at ioloop.c:281
No locals.
#20 0x2b3d0 in main (argc=0, argv=0xffbefae4, envp=0xffbefaf4) at main.c:280
No locals.