dovecot - Dec 2016 - imap Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0 on Fedora 24

Seems to be related to https://bugzilla.redhat.com/show_bug.cgi?id=1189198
<https://bugzilla.redhat.com/show_bug.cgi?id=1189198>. Separate note the
link to Overview of all dovecot.org mailing lists
<http://dovecot.org/mailman/listinfo> http://dovecot.org/mailman/listinfo
<http://dovecot.org/mailman/listinfo> is broken as are the images on the
page.

Here?s the backtrace.

dovecot[12438]: imap(username): Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0x91ab2) [0x7ff01e98cab2] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x91bad) [0x7ff01e98cbad] ->
/usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7ff01e925f41] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(+0xaa1ed) [0x7ff01ecc01ed] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_mail_get_first_header+0xd2)
[0x7ff01ecc0652] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_get_first_header+0x3d)
[0x7ff01ec4c88d] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbe717)
[0x7ff01ecd4717] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbe952)
[0x7ff01ecd4952] -> /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x53)
[0x7ff01e997653] ->
/usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7ff01e99807d]
-> /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x72)
[0x7ff01e9748e2] -> /usr/lib64/dovecot/libdovecot.so.0(+0x73d91)
[0x7ff01e96ed91] -> /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x53)
[0x7ff01e997653] ->
/usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7ff01e99807d]
-> /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x72)
[0x7ff01e9748e2] ->
/usr/lib64/dovecot/libdovecot.so.0(message_parse_header+0x4f) [0x7ff01e97527f]
-> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb0d4b) [0x7ff01ecc6d4b]
-> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb2e63) [0x7ff01ecc8e63]
->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x114)
[0x7ff01ecc9574] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x22)
[0x7ff01ec56d52] -> dovecot/imap(+0x221ff) [0x559b559541ff] ->
dovecot/imap(imap_search_start+0xd1) [0x559b559545c1] ->
dovecot/imap(cmd_search+0xd3) [0x559b55946063] ->
dovecot/imap(command_exec+0xa5) [0x559b5594d5d5] -> dovecot/imap(+0x19852)
[0x559b5594b852] -> dovecot/imap(+0x198de) [0x559b5594b8de] ->
dovecot/imap(client_handle_input+0x1b5) [0x559b5594bce5] ->
dovecot/imap(client_input+0x82) [0x559b5594c262]

dovecot[12438]: imap(username): Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0x91ab2) [0x7f77a0cd7ab2] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x91bad) [0x7f77a0cd7bad] ->
/usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f77a0c70f41] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(+0xaa1ed) [0x7f77a100b1ed] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_mail_get_first_header+0xd2)
[0x7f77a100b652] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_get_first_header+0x3d)
[0x7f77a0f9788d] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbe717)
[0x7f77a101f717] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbe952)
[0x7f77a101f952] -> /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x53)
[0x7f77a0ce2653] ->
/usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7f77a0ce307d]
-> /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x72)
[0x7f77a0cbf8e2] -> /usr/lib64/dovecot/libdovecot.so.0(+0x73d91)
[0x7f77a0cb9d91] -> /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x53)
[0x7f77a0ce2653] ->
/usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7f77a0ce307d]
-> /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x72)
[0x7f77a0cbf8e2] ->
/usr/lib64/dovecot/libdovecot.so.0(message_parse_header+0x4f) [0x7f77a0cc027f]
-> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb0d4b) [0x7f77a1011d4b]
-> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xb2e63) [0x7f77a1013e63]
->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x114)
[0x7f77a1014574] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x22)
[0x7f77a0fa1d52] -> dovecot/imap(+0x221ff) [0x563492d1d1ff] ->
dovecot/imap(imap_search_start+0xd1) [0x563492d1d5c1] ->
dovecot/imap(cmd_search+0xd3) [0x563492d0f063] ->
dovecot/imap(command_exec+0xa5) [0x563492d165d5] -> dovecot/imap(+0x19852)
[0x563492d14852] -> dovecot/imap(+0x198de) [0x563492d148de] ->
dovecot/imap(client_handle_input+0x1b5) [0x563492d14ce5] ->
dovecot/imap(client_input+0x82) [0x563492d15262]


dovecot --version
2.2.26.0 (23d1de6)


dovecot -n
# 2.2.26.0 (23d1de6): /etc/dovecot/dovecot.conf
# OS: Linux 4.8.4-200.fc24.x86_64 x86_64 Fedora release 24 (Twenty Four) 
mail_fsync = always
mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u
mail_nfs_index = yes
mail_nfs_storage = yes
mbox_write_locks = fcntl
mmap_disable = yes
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  driver = pam
}
ssl = required
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_cipher_list = PROFILE=SYSTEM
ssl_key =  # hidden, use -P to show it
userdb {
  driver = passwd
}