[Dovecot] Debugging test72

[Doug Luce]

> I can't really see how this could happen.. You can reproduce this every
> time? Does it matter what the source or destination mailboxes are?

I can reproduce it every time I save a message to any folder
collection subfolder.  I haven't tried yet to a non-subfolder
collection.

> Could you show output of these commands in gdb:

(gdb) p *map
$1 = {refcount = 537733560, hdr = {major_version = 4 '\004',
     minor_version = 0 '\0', base_header_size = 0, header_size = 0,
     record_size = 806526976, compat_data = "\001\0\0", indexid =
     191112,
     flags = 0, uid_validity = 191112, next_uid = 0, messages_count =
     0,
     recent_messages_count = 0, seen_messages_count = 537585472,
     deleted_messages_count = 1, first_recent_uid_lowwater = 0,
     first_unseen_uid_lowwater = 0, first_deleted_uid_lowwater = 0,
     log_file_seq = 0, log_file_int_offset = 0, log_file_ext_offset =
     0,
     sync_size = 4832625920, sync_stamp = 537668480, day_stamp = 1,
     day_first_uid = {537667072, 1, 537667072, 1, 0, 0, 0, 0}},
     hdr_base = 0x0,
   records = 0x3c, records_count = 60, extension_pool = 0x0, extensions
   = {
     buffer = 0x0, element_size = 0}, ext_id_map = {buffer =
     0x120091ab8,
     element_size = 60}, mmap_base = 0x3c, mmap_size = 0,
     mmap_used_size = 0,
   buffer = 0x0, hdr_copy_buf = 0x3e2a, keyword_idx_map = {
     buffer = 0x1200c5620, element_size = 4832646784}, write_to_disk =
     0}
(gdb) p *map.ext_id_map
Structure has no component named operator*.
(gdb) p *map.ext_id_map.buffer
$2 = {data = 0x6b636f6c77656e2e, used = 7162254444802766080}

>> Program received signal SIGABRT, Aborted.
>> 0x130247908 in kill () from /lib/libc.so.5
>
> SIGABRT? I was expecting SIGSEGV. Does it write something to log? Is the
> backtrace different after the SIGABRT?

Here's from /var/log/messages:

Jun  7 18:44:36 aurora dovecot: execv(libexec/dovecot/dovecot-auth)
failed: No such file or directory
Jun  7 18:44:36 aurora dovecot: execv(libexec/dovecot/imap-login)
failed: No such file or directory

You can find my source tree, including my config.h and dovecot.conf,
at this address:

   http://aurora.aaronsen.com/dovecot/


Doug