[Dovecot] version 1.1.3 assertion on index-sort-string

[Nuno Lopes]

Hi,
  I am seeing the following log lines on some accounts on my setup:

Sep 11 01:42:36 xxxx dovecot: Panic: IMAP(xxxxxxxxxxxxxxxx): file 
index-sort-string.c: line 610 (index_sort_add_ids_range): assertion 
failed: (skip > 0)
Sep 11 01:42:36 xxxx dovecot: IMAP(xxxxxxxxxxxxxx): Raw backtrace: imap 
[0x5555555d3690] -> imap [0x5555555d36f7] -> imap [0x5555555d2d58] -> 
imap(index_sort_list_finish_string+0xf13) [0x5555555a04b3] -> 
imap(index_storage_search_next_nonblock+0x432) [0x55555559cd22] -> 
imap(mailbox_search_next+0x21) [0x5555555a42b1] -> imap(imap_sort+0xdc) 
[0x555555577ddc] -> imap(cmd_sort+0x33d) [0x555555570ead] -> 
imap(cmd_uid+0x54) [0x555555571934] -> imap [0x55555557234c] -> imap 
[0x555555572402] -> imap [0x555555572c1f] -> imap(client_input+0x62) 
[0x555555572e42] -> imap(io_loop_handler_run+0xf8) [0x5555555da6d8] -> 
imap(io_loop_run+0x1d) [0x5555555d972d] -> imap(main+0x462) 
[0x55555557a5f2] -> /lib64/libc.so.6(__libc_start_main+0xf4) 
[0x2b7c871d8154] -> imap [0x55555556c8c9]

these assertions happen when ordering by from and go away by deleting 
index files.

As usual if you wish I can send you the index files as they were when 
this error happened.

Thanks,
--
Nuno Lopes